Huawei NetCol5000-C Operation & User’s Manual

Smart Cooling Product User Manual Issue 07 Date 2020-03-16 HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. i Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website: https://e.huawei.com

Cooling Product User Manual About This Document Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. ii About This Document Purpose This document describes the NetCol5000-C(065, 080) full-size chilled water smart cooling product (NetCol5000-C for short) in terms of the product description, indoor unit installation, commissioning, and system operation and maintenance, helping readers to systematically master the usage and maintenance of the NetCol5000-C. The figures provided in this document are for reference only. Intended Audience This document is intended for:  Sales engineers  Technical support engineers  System engineers  Hardware installation engineers  Commissioning engineers  Data configuration engineers  Maintenance engineers Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol Description Indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury. Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury. Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

Cooling Product User Manual About This Document Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. iii Symbol Description Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results. NOTICE is used to address practices not related to personal injury. Supplements the important information in the main text. NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration. Change History Changes between document issues are cumulative. The latest document issue contains all the changes made in earlier issues. Issue 07 (2020-03-16) Optimized the Preparations and WebUI Login section. Issue 06 (2019-12-20) Updated the safety information. Issue 05 (2019-06-26) Updated chilled water valve. Issue 04 (2019-04-20) Added the description of installing a water sensor. Issue 03 (2019-01-15) Updated the manual name and so on. Issue 02 (2018-09-15) Canceled the configuration of the condensate pump. Issue 01 (2018-01-25) This issue is the first official release.

Cooling Product User Manual Contents Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. iv Contents About This Document ............................................................................................................... ii 1 Safety Information ................................................................................................................... 1 1.1 General Safety ....................................................................................................................................................... 1 1.2 Personnel Requirements ........................................................................................................................................ 4 1.3 Electrical Safety .................................................................................................................................................... 4 1.4 Installation Environment Requirements .................................................................................................................. 6 1.5 Mechanical Safety ................................................................................................................................................. 7 1.6 Cooling System Safety .........................................................................................................................................10 1.7 Others ..................................................................................................................................................................10 2 Product Description ............................................................................................................... 11 2.1 Model Description ................................................................................................................................................ 11 2.2 Component ...........................................................................................................................................................12 2.2.1 Appearance and Components .............................................................................................................................12 2.2.2 Controller ..........................................................................................................................................................14 2.2.2.1 Appearance and Ports ......................................................................................................................................14 2.2.2.2 Functions and Features ....................................................................................................................................17 2.2.3 Monitoring System ............................................................................................................................................18 2.3 Application Conditions .........................................................................................................................................20 2.4 Technical Specifications .......................................................................................................................................23 2.5 Performance Curves .............................................................................................................................................24 3 Installation .............................................................................................................................. 26 3.1 Installation Precautions .........................................................................................................................................26 3.1.1 Tools .................................................................................................................................................................27 3.1.2 Pipe Connection ................................................................................................................................................28 3.1.3 Material Preparations .........................................................................................................................................29 3.1.3.1 Automatic Drainpipe .......................................................................................................................................29 3.1.3.2 (Optional) Condensate Pump Drainpipe ..........................................................................................................30 3.1.3.3 (Optional) Humidifier Water Inlet Pipe ............................................................................................................31 3.1.3.4 Chilled Water Inlet and Outlet Pipes ................................................................................................................32 3.1.3.5 Pipe Support ...................................................................................................................................................32 3.1.3.6 Cables ............................................................................................................................................................33 3.1.4 Structural Specifications ....................................................................................................................................34

Cooling Product User Manual Contents Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. v 3.1.4.1 NetCol5000-C065 external structure ...............................................................................................................34 3.1.4.2 NetCol5000-C080 external structure ...............................................................................................................35 3.1.4.3 Cabinet Holes .................................................................................................................................................35 3.2 Unpacking ............................................................................................................................................................36 3.3 Installation Process ...............................................................................................................................................37 3.4 Checking the nitrogen pressure .............................................................................................................................37 3.5 Removing the Pallet .............................................................................................................................................39 3.6 Leveling and Combining Cabinets ........................................................................................................................40 3.7 Securing the NetCol5000-C ..................................................................................................................................42 3.8 Connecting Water Pipes ........................................................................................................................................42 3.8.1 Connect Automatic Drainpipe ............................................................................................................................42 3.8.2 (Optional) Connecting the Water Pump Drainpipe ..............................................................................................44 3.8.3 (Optional) Connecting the Humidifier Water Inlet Pipe .......................................................................................45 3.8.4 Connecting the Chilled Water Inlet and Outlet Pipes ...........................................................................................46 3.8.4.1 Connecting Seamless Steel Pipes .....................................................................................................................46 3.8.4.2 Connecting Aluminum Plastic Pipes ................................................................................................................47 3.9 (Optional) Performing a Leakage Test with Nitrogen .............................................................................................49 3.10 Injecting Water to Expel Gas ...............................................................................................................................50 3.11 (Optional) Leakage Test with Water ....................................................................................................................51 3.12 Cable Connections ..............................................................................................................................................51 3.12.1 Overview and Precautions ................................................................................................................................51 3.12.2 Connecting Power Cables ................................................................................................................................51 3.12.3 Connecting an Equipotential PE Cable .............................................................................................................53 3.12.4 Teamwork Networking and Monitoring ............................................................................................................54 3.12.4.1 Main Control Panel .......................................................................................................................................54 3.12.4.2 Signal Ports ..................................................................................................................................................55 3.12.4.3 Connecting the Teamwork Network Cable .....................................................................................................55 3.12.4.3.1 Connecting the FE Teamwork Network Cable .............................................................................................55 3.12.4.3.2 Connecting the CAN Teamwork Cable .......................................................................................................56 3.12.4.4 Connecting the Monitoring Network Cable ....................................................................................................57 3.12.4.4.1 Connecting the FE Monitoring Network Cable (SNMP/Modbus-TCP) ........................................................57 3.12.4.4.2 Connecting the RS485 Monitoring Network Cable (Modbus-RTU) .............................................................57 3.12.5 Connecting the Water Sensor............................................................................................................................59 3.12.6 Connecting the T/H Sensor Outside the Cabinet ...............................................................................................59 3.12.7 (Optional) Installing a Differential Pressure Sensor ..........................................................................................61 3.13 Checking After Installation .................................................................................................................................62 4 Commissioning....................................................................................................................... 64 4.1 Power-On .............................................................................................................................................................64 4.2 Home Screen ........................................................................................................................................................69 4.3 Initial Configuration .............................................................................................................................................71 4.3.1 Setting Temperature and Humidity Values and (Optional) Enabling T/H Sensors.................................................71

Cooling Product User Manual Contents Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. vi 4.3.2 (Optional) Setting the Pressure Difference Control .............................................................................................74 4.3.3 Setting Teamwork Control Parameters................................................................................................................75 4.3.4 Setting Communications Parameters ..................................................................................................................81 4.3.4.1 Setting Communications Parameters (Modbus RTU Protocol) .........................................................................81 4.3.4.2 Setting Communications Parameters (Modbus TCP Protocol) ..........................................................................81 4.3.4.3 Setting Communications Parameters (SNMP Protocol) ....................................................................................83 4.3.5 (Optional) Setting WIFI Parameters ...................................................................................................................88 4.4 Startup..................................................................................................................................................................89 4.5 Startup Wizard ......................................................................................................................................................93 4.6 (Optional) Power-off ............................................................................................................................................97 4.7 Checking After Commissioning ............................................................................................................................98 5 WebUI ...................................................................................................................................... 99 5.1 Preparations and WebUI Login .............................................................................................................................99 5.2 WebUI Introduction ............................................................................................................................................ 101 6 System Operation and Maintenance ................................................................................. 105 6.1 Routine Maintenance .......................................................................................................................................... 105 6.1.1 Routine Maintenance Overview ....................................................................................................................... 105 6.1.2 Routine Maintenance Item ............................................................................................................................... 106 6.2 Alarm References ............................................................................................................................................... 108 6.3 Troubleshooting.................................................................................................................................................. 153 6.4 Parts Replacement .............................................................................................................................................. 155 6.4.1 Replacement Requirements .............................................................................................................................. 155 6.4.2 Replacing the Air Filter .................................................................................................................................... 156 6.4.3 Replacing the Humidifier Pump ....................................................................................................................... 157 6.4.4 Replacing the Fan ............................................................................................................................................ 159 6.4.5 Replacing the Wet Film Humidifier .................................................................................................................. 160 6.4.6 Replacing the Differential Pressure Switch ....................................................................................................... 161 6.4.7 Replacing the T/H Sensor ................................................................................................................................ 162 6.4.8 Replacing the Return Air Temperature Sensor .................................................................................................. 163 6.4.9 Replacing the Supply Air Temperature Sensor .................................................................................................. 164 6.4.10 Replacing the Water Inlet or Outlet Temperature Sensor ................................................................................. 166 6.4.11 Replacing a rectifier ....................................................................................................................................... 167 6.4.12 Replacing the Water Valve Actuator 1 ............................................................................................................. 168 6.4.13 Replacing Water Valve Actuator 2 .................................................................................................................. 169 6.4.14 Replacing the Chilled Water Valve ................................................................................................................. 172 6.4.15 Replacing the Controller Panel ....................................................................................................................... 173 7 FAQ ........................................................................................................................................ 175 7.1 Operations on the LCD ....................................................................................................................................... 175 7.1.1 Querying Temperature and Humidity Curves .................................................................................................... 175 7.1.2 Querying Logs ................................................................................................................................................. 176 7.1.3 Querying Component Status............................................................................................................................. 176

Cooling Product User Manual Contents Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. vii 7.1.4 Querying System Parameters ........................................................................................................................... 177 7.1.5 Querying Version Details ................................................................................................................................. 178 7.1.6 How to View Teamwork Control Information ................................................................................................... 179 7.1.7 How to Silence the Buzzer ............................................................................................................................... 180 7.1.8 How Can I Handle Active Alarms? ................................................................................................................... 181 7.1.9 Deleting Historical Alarms ............................................................................................................................... 182 7.1.10 Deleting Logs ................................................................................................................................................ 183 7.1.11 Clearing the Runtime ..................................................................................................................................... 184 7.1.12 Calibrating a Sensor ....................................................................................................................................... 184 7.1.13 Calibrating the Screen .................................................................................................................................... 185 7.1.14 How to Modify a Password ............................................................................................................................ 186 7.1.15 How to Set Alarm Parameters ........................................................................................................................ 188 7.1.16 How to Commission Single Component ......................................................................................................... 189 7.1.17 Restoring Factory Settings ............................................................................................................................. 190 7.1.18 Which Parameters Are Restored to Default Values After Default Settings Are Operated .................................. 193 7.1.19 Exporting Data .............................................................................................................................................. 193 7.1.20 How to Export and Import a Configuration file ............................................................................................... 195 7.1.21 How to Import a Certificate and a Key ........................................................................................................... 198 7.1.22 Correlation Relationship of Parameters .......................................................................................................... 199 7.2 WebUI Operations .............................................................................................................................................. 201 7.2.1 How to Manage WebUI Users? ........................................................................................................................ 201 7.2.2 How to Install a Network Security Certificate? ................................................................................................. 203 7.2.3 How Can I View Active Alarms and Historical Alarms?.................................................................................... 204 7.2.4 How Can I Export or Import a Configuration File? ........................................................................................... 204 7.2.5 How Can I Export Fault Information? .............................................................................................................. 205 7.2.6 How Can I Change the Smart Cooling Product IP Address on the WebUI? ........................................................ 205 7.2.7 How Can I View Version Information? ............................................................................................................. 206 A Glycol Adding Requirements............................................................................................ 207 B Acronyms and Abbreviations ............................................................................................ 208 C Base Dimensions ................................................................................................................. 209 D Electrical Conceptual Diagram .......................................................................................... 210

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 1 1 Safety Information 1.1 General Safety Statement Before installing, operating, and maintaining the equipment, read this document and observe all the safety instructions on the equipment and in this document. The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this document do not cover all the safety instructions. They are only supplements to the safety instructions. Huawei will not be liable for any consequence caused by the violation of general safety requirements or design, production, and usage safety standards. Ensure that the equipment is used in environments that meet its design specifications. Otherwise, the equipment may become faulty, and the resulting equipment malfunction, component damage, personal injuries, or property damage are not covered under the warranty. Follow local laws and regulations when installing, operating, or maintaining the equipment. The safety instructions in this document are only supplements to local laws and regulations. Huawei will not be liable for any consequences of the following circumstances:  Operation beyond the conditions specified in this document  Installation or use in environments which are not specified in relevant international or national standards  Unauthorized modifications to the product or software code or removal of the product  Failure to follow the operation instructions and safety precautions on the product and in this document  Equipment damage due to force majeure, such as earthquakes, fire, and storms  Damage caused during transportation by the customer  Storage conditions that do not meet the requirements specified in this document General Requirements  Do not install, use, or operate outdoor equipment and cables (including but not limited to moving equipment, operating equipment and cables, inserting connectors to or removing connectors from signal ports connected to outdoor facilities, working at heights, and performing outdoor installation) in harsh weather conditions such as lightning, rain, snow, and level 6 or stronger wind.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 2  Before installing, operating, or maintaining the equipment, remove any conductive objects such as watches or metal jewelry like bracelets, bangles, and rings to avoid electric shock.  When installing, operating, or maintaining the equipment, wear dedicated protective gears such as insulation gloves, goggles, and safety clothing, helmet, and shoes, as shown in the following figure.  Follow the specified procedures for installation, operation, and maintenance.  Before handling a conductor surface or terminal, measure the contact point voltage and ensure that there is no risk of electric shock.  After installing the equipment, remove idle packing materials such as cartons, foam, plastics, and cable ties from the equipment area.  In the case of a fire, immediately leave the building or the equipment area, and turn on the fire alarm bell or make an emergency call. Do not enter the building on fire in any case.  Do not stop using protective devices. Pay attention to the warnings, cautions, and related precautionary measures in this document and on the equipment. Promptly replace warning labels that have worn out.  Keep irrelevant people away from the equipment. Only operators are allowed to access the equipment.  Use insulated tools or tools with insulated handles, as shown in the following figure.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 3  All cable holes should be sealed. Seal the used cable holes with firestop putty. Seal the unused cable holes with the caps delivered with the cabinet. The following figure shows the criteria for correct sealing with firestop putty.  Do not scrawl, damage, or block any warning label on the equipment.  Tighten the screws using tools when installing the equipment.  Do not work with power on during installation.  Repaint any paint scratches caused during equipment transportation or installation in a timely manner. Equipment with scratches cannot be exposed to an outdoor environment for a long period of time.  Before operations, ensure that the equipment is firmly secured to the floor or other solid objects, such as a wall or an installation rack.  Do not use water to clean electrical components inside or outside of a cabinet.  Do not change the structure or installation sequence of equipment without permission.  Do not touch a running fan with your fingers, components, screws, tools, or boards before the fan is powered off or stops running. Personal Safety  If there is a probability of personal injury or equipment damage during operations on the equipment, immediately stop the operations, report the case to the supervisor, and take feasible protective measures.  To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telecommunication network voltage (TNV) circuits.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 4  Do not power on the equipment before it is installed or confirmed by professionals. 1.2 Personnel Requirements  Personnel who plan to install or maintain Huawei equipment must receive thorough training, understand all necessary safety precautions, and be able to correctly perform all operations.  Only qualified professionals or trained personnel are allowed to install, operate, and maintain the equipment.  Only qualified professionals are allowed to remove safety facilities and inspect the equipment.  Personnel who will operate the equipment, including operators, trained personnel, and professionals, should possess the local national required qualifications in special operations such as high-voltage operations, working at heights, and operations of special equipment.  Professionals: personnel who are trained or experienced in equipment operations and are clear of the sources and degree of various potential hazards in equipment installation, operation, maintenance  Trained personnel: personnel who are technically trained, have required experience, are aware of possible hazards on themselves in certain operations, and are able to take protective measures to minimize the hazards on themselves and other people  Operators: operation personnel who may come in contact with the equipment, except trained personnel and professionals  Only professionals or authorized personnel are allowed to replace the equipment or components (including software). 1.3 Electrical Safety Grounding  For the equipment that needs to be grounded, install the ground cable first when installing the equipment and remove the ground cable last when removing the equipment.  Do not damage the ground conductor.  Do not operate the equipment in the absence of a properly installed ground conductor.  Ensure that the equipment is connected permanently to the protective ground. Before operating the equipment, check its electrical connection to ensure that it is securely grounded. General Requirements Use dedicated insulated tools when performing high-voltage operations. AC and DC Power

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 5 Do not connect or disconnect power cables with power on. Transient contact between the core of the power cable and the conductor will generate electric arcs or sparks, which may cause fire or personal injury.  If a "high electricity leakage" tag is attached on the equipment, ground the protective ground terminal on the equipment enclosure before connecting the AC power supply; otherwise, electric shock as a result of electricity leakage may occur.  Before installing or removing a power cable, turn off the power switch.  Before connecting a power cable, check that the label on the power cable is correct.  If the equipment has multiple inputs, disconnect all the inputs before operating the equipment.  A circuit breaker equipped with a residual current device (RCD) is not recommended.  A damaged power cable must be replaced by the manufacturer, service agent, or professionals to avoid risks.  High voltage operations and installation of AC-powered facilities must be performed by qualified personnel. Cabling  When routing cables, ensure that a distance of at least 30 mm exists between the cables and heat-generating components or areas. This prevents damage to the insulation layer of the cables.  Do not route cables behind the air intake and exhaust vents of the equipment.  Ensure that cables meet the VW-1 flame spread rating requirements.  Bind cables of the same type together. When routing cables of different types, ensure that they are at least 30 mm away from each other.  If an AC input power cable is connected to the cabinet from the top, bend the cable in a U shape outside the cabinet and then route it into the cabinet.  When the temperature is low, violent impact or vibration may damage the plastic cable sheathing. To ensure safety, comply with the following requirements:  Cables can be laid or installed only when the temperature is higher than 0°C. Handle cables with caution, especially at a low temperature.  Cables stored at subzero temperatures must be stored at room temperature for at least 24 hours before they are laid out.  Do not perform any improper operations, for example, dropping cables directly from a vehicle.  When selecting, connecting, and routing cables, follow local safety regulations and rules. ESD The static electricity generated by human bodies may damage the electrostatic-sensitive components on boards, for example, the large-scale integrated (LSI) circuits.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 6  Wear ESD gloves or a well-grounded ESD wrist strap when touching the device or handling boards or application-specific integrated circuits (ASICs).  When holding a board, hold its edge without touching any components. Do not touch the components with your bare hands.  Package boards with ESD packaging materials before storing or transporting them. Figure 1-1 Wearing an ESD wrist strap Neutral-Ground Voltage It is recommended that the three-phase loads be equalized and the neutral-ground voltage be kept at less than 2 V to meet power distribution requirements. 1.4 Installation Environment Requirements  To prevent fire due to high temperature, ensure that the ventilation vents or heat dissipation system are not blocked when the equipment is running.  Install the equipment in an area far away from liquids. Do not install it under areas prone to condensation, such as under water pipes and air exhaust vents, or areas prone to water leakage, such as air conditioner vents, ventilation vents, or feeder windows of the equipment room. Ensure that no liquid enters the equipment to prevent faults or short circuits.  If any liquid is detected inside the equipment, immediately disconnect the power supply and contact the administrator.  Do not expose the equipment to flammable or explosive gas or smoke. Do not perform any operation on the equipment in such environments.  Ensure that the equipment room provides good heat insulation, and the walls and floor are dampproof.  Install a rat guard at the door of the equipment room.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 7 Installation at Heights  Working at heights refers to operations that are performed at least 2 meters above the ground.  Do not work at heights if the steel pipes are wet or other potential danger exists. After the preceding conditions no longer exist, the safety director and relevant technical personnel need to check the involved equipment. Operators can begin working only after obtaining consent.  When working at heights, comply with local relevant laws and regulations.  Only trained and qualified personnel are allowed to work at heights.  Before working at heights, check the climbing tools and safety gears such as safety helmets, safety belts, ladders, springboards, scaffolding, and lifting equipment. If they do not meet the requirements, take corrective measures or disallow working at heights.  Wear personal protective equipment such as the safety helmet and safety belt or waist rope and fasten it to a solid structure. Do not mount it on an insecure moveable object or metal object with sharp edges. Make sure that the hooks will not slide off.  Set a restricted area and eye-catching signs for working at heights to warn away irrelevant personnel.  Carry the operation machinery and tools properly to prevent them from falling off and causing injuries.  Personnel involving working at heights are not allowed to throw objects from the height to the ground, or vice versa. Objects should be transported by tough slings, hanging baskets, highline trolleys, or cranes.  Ensure that guard rails and warning signs are set at the edges and openings of the area involving working at heights to prevent falls.  Do not pile up scaffolding, springboards, or other sundries on the ground under the area involving working at heights. Do not allow people to stay or pass under the area involving working at heights.  Inspect the scaffolding, springboards, and workbenches used for working at heights in advance to ensure that their structures are solid and not overloaded.  Any violations must be promptly pointed out by the site manager or safety supervisor and the involved personnel should be prompted for correction. Personnel who fail to stop violations will be forbidden from working. 1.5 Mechanical Safety Hoisting Devices  Do not walk under hoisted objects.  Only trained and qualified personnel should perform hoisting operations.  Check that hoisting tools are available and in good condition.  Before hoisting objects, ensure that hoisting tools are firmly secured onto a load-bearing object or wall.  Ensure that the angle formed by two hoisting cables is no more than 90 degrees, as shown in the following figure.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 8  Do not drag steel ropes and hoisting tools or bump hoisted objects against hard objects during hoisting. Using Ladders  Use wooden or fiberglass ladders when you need to perform live working at heights.  When a step ladder is used, ensure that the pull ropes are secured and the ladder is held firm.  Before using a ladder, check that it is intact and confirm its load bearing capacity. Do not overload it.  Ensure that the ladder is securely positioned. The recommended angle for a ladder against the floor is 75 degrees, as shown in the following figure. An angle rule can be used to measure the angle. Ensure that the wider end of the ladder is at the bottom, or protective measures have been taken at the bottom to prevent the ladder from sliding.  When climbing a ladder, take the following precautions to reduce risks and ensure safety:  Keep your body steady.  Do not climb higher than the fourth rung of the ladder from the top.  Ensure that your body's center of gravity does not shift outside the legs of the ladder.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 9 Drilling Holes When drilling holes into a wall or floor, observe the following safety precautions: Do not drill holes into the equipment. Doing so may affect the electromagnetic shielding of the equipment and damage components or cables inside. Metal shavings from drilling may short-circuit boards inside the equipment.  Obtain the consent from the customer, subcontractor, and Huawei before drilling.  Wear goggles and protective gloves when drilling holes.  When drilling holes, protect the equipment from shavings. After drilling, clean up any shavings that have accumulated inside or outside the equipment. Moving Heavy Objects When removing a heavy or unstable component from a cabinet, be aware of unstable or heavy objects on the cabinet.  Be cautious to avoid injury when moving heavy objects.  When moving the equipment by hand, wear protective gloves to prevent injuries.  Move or lift the equipment by holding its handles or lower edges. Do not hold the handles of modules (such as power supply units, fans, and boards) that are installed in the equipment because they cannot support the weight of the equipment.  Avoid scratching the cabinet surface or damaging cabinet components and cables during equipment transportation.  When transporting the equipment using a forklift truck, ensure that the forks are properly positioned to ensure that the equipment does not topple. Before moving the equipment, secure it to the forklift truck using ropes. When moving the equipment, assign dedicated personnel to take care of it.  Choose railways, sea, or a road with good condition for transportation to ensure equipment safety. Avoid tilt or jolt during transportation.  Move a cabinet with caution. Any bumping or falling may damage the equipment.

Cooling Product User Manual 1 Safety Information Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 10 1.6 Cooling System Safety Welding  At least two persons are required on a welding site.  A welder must have a work permit.  A welding site must be free from inflammables.  Ensure that a fire extinguisher, wet wiper, and water container are available.  A burning welding torch must not be placed on a component or on the floor, and must not be placed in a metal container with acetylene and oxygen. Otherwise, the gas may leak and cause a fire.  High-temperature pipes after welding must be promptly cooled.  Do not weld or cut on pressurized containers or pipes. Electric devices must be powered off before welding. High Temperature and Pressure  When maintaining or replacing components, pay attention to high-temperature components (such as the compressor, refrigerant pipe, and electric heater) to prevent scalds.  When maintaining or replacing components, pay attention to high-pressure components (such as the compressor and refrigerant pipe) to prevent the refrigerant system from being cracked or exploded due to misoperations. Refrigerant Frostbite Refrigerant leakage may cause frostbite. Take protective measures (for example, wear antifreeze gloves) when handling refrigerant. Storage and Recycling  Do not store devices near a heat source or under direct sunshine.  Keep devices away from fire or high-temperature objects, especially devices injected with pressurized nitrogen or refrigerant; otherwise, explosion or refrigerant leakage may occur, causing personal injury.  The sign indicates that the product cannot be disposed of with other wastes that have a shell in European Union (EU) areas. To avoid environment pollution and harm to human health, wastes must be classified and recycled. This also promotes resource reuse. When recycling a device, fill in the device information in the recycling collection system or contact your dealer for help. The dealer can help you recycle devices in a safe and environment-friendly way. 1.7 Others Exercise caution when shutting down the smart cooling product. Doing so may cause equipment and room overheating, which will damage the equipment.

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 11 2 Product Description 2.1 Model Description

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 12 2.2 Component 2.2.1 Appearance and Components Appearance Figure 2-1 NetCol5000-C065

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 13 Figure 2-2 NetCol5000-C080 Figure 2-3 Component appearance Components The smart cooling product consists of the heat exchanger, chilled water valve, EC fan, air filter, condensate pump, wet film humidifier (optional), and micro differential pressure sensor (optional).  Heat exchanger The I-type finned-tube exchanger with a high cooling efficiency adopts the synergy field principle and computational fluid dynamics (CFD) to optimize the flow path design, which greatly improves the heat exchange efficiency.  Chilled water valve

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 14 The chilled water valve, also known as the chilled water proportional integral regulating valve, features incremental proportional-integral-derivative (PID) control with precise adjustment and accurate control.  EC fan − The axial fan comes from a high-end brand and provides high reliability and a long service life. − The highly efficient EC fan saves more than 30% of energy than a common fan. − You can view the power and speed status as well as obtain fault information in real time over the LCD, allowing you to view the status and locate a fault.  Air filter The G4 (optional F5) air filter meets requirements for equipment room cleanliness.  Condensate pump Enhances the reliability in drainage.  Wet film humidifier − The wet film humidifier has low water quality requirements and high environment adaptability. In most cases, tap water can be used without special water treatment. − The wet film humidifier has a simple structure and is easy to remove, clean, and maintain. − The wet film humidifier quickly starts and generates huge humidification capacity. − The wet film humidifier consumes less than over 95% of energy compared with a traditional electrode humidifier.  Micro differential pressure sensor Intelligent differential pressure control (optional): Saves energy compared with the control mode of a normal fan. 2.2.2 Controller 2.2.2.1 Appearance and Ports Appearance The controller provides a 7-inch true color touchscreen and man-machine interfaces for query, setting, monitoring, and maintenance. The indicator on the panel displays operating status of the smart cooling product. Figure 2-4 shows the position of the indicator. Table 2-1 describes the mapping between indicators, buzzers, and alarms. If alarms of different severities (critical, major, minor, or warning) are raised simultaneously, the indicator status corresponds to the alarm with the highest severity level and the buzzer status corresponds to the unacknowledged alarm with the highest severity level.

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 15 Figure 2-4 Display panel (1) Indicator (2) Display panel Table 2-1 Indicator and buzzer status description Alarm Status Indicator Buzzer The device is operating properly, or a warning is generated. Green No buzzing There is an unacknowledged major alarm. Yellow Intermittent buzzing There is an unacknowledged critical alarm. Red Constant buzzing

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 16 Ports Figure 2-5 Controller side ports Table 2-2 Ports No. Name Note 1 MUS05A Reserved 2 FE (fast Ethernet) communications port 3 CAN communications port for the main control board and LCD 4 RS485_1 Reserved 5 USB Host  After installing the WiFi module, locally connect to the smart cooling product over the Service Expert app. Obtain the initial startup password during deployment. View or obtain the running information about the smart cooling product during preventive maintenance. (Applicable to V200R001C20 and later versions) NOTE Only Huawei service engineers or authorized service engineers are allowed to use the WiFi module. To ensure security, remove the WiFi module immediately after use.  Insert the USB flash drive, import and export the configuration file, export run logs, and upgrade software. 6 RST restart switch for the display

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 17 No. Name Note 7 SD Reserved 8 SW1-4 Dual in-line package (DIP) switch on LCD 2.2.2.2 Functions and Features Functions  Single unit control: Each smart cooling product has an independent control system, LCD, humidifier, and T/H sensor to ensure its normal operating and high-precision operating. The controller provides logic control over components in each smart cooling product to meet the indoor temperature and humidity requirements.  Display and operations: The 7-inch touchscreen of the controller allows you to set parameters for the device and query the device status.  The smart cooling product has the following four remote functions. − Telemetry: supply air temperature, return air temperature, supply air humidity, return air humidity, and working status of the unit − Teleindication: startup/shutdown, overvoltage/undervoltage, supply water overtemperature/undertemperature, return air overtemperature/undertemperature, return air overhumidity/underhumidity, air filter normal/blocked, and fan normal/fault − Teleadjust: smart cooling product startup/shutdown − Teleadjusting: temperature, humidity, and alarm threshold  Teamwork control: Up to 32 smart cooling products can be networked for teamwork. When multiple smart cooling products work cooperatively, heat load is optimally distributed to reduce power consumption and backup is provided to improve reliability. − Backup: When a smart cooling product in the group is faulty, the backup smart cooling product starts to operate automatically to improve the reliability of the smart cooling product system. − Rotation: Each smart cooling product enters the backup mode periodically. − On-demand operation: The number of operating smart cooling products varies depending on the thermal load in the equipment room to meet requirements promptly, eliminate hot spots, and save energy. − Anti-competitive running: A mechanism is adopted to prevent the smart cooling products in the same equipment room operating in opposite status to save energy.  Remote management: You can monitor, manage, and upgrade one or more smart cooling products using the remote management software (NetEco, ECC, app, and Web) provided by Huawei.  A large space is available for recording and storing fault alarm data, and 1500 historical alarms can be stored.  Access logs can be traced back. At least 1000 historical login and setting records can be stored.  The monitoring system displays 30 days' temperature and humidity in colored curves. O&M personnel can view the unit operating status onsite.  A comprehensive power monitoring function is provided. Faults such as overvoltage, undervoltage, mains power failure, high frequency, and low frequency are diagnosed and

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 18 appropriate alarms are reported and recorded. Automatic protection, recovery, and restart are also provided.  The embedded wizard commissioning program guides the operator through the startup commissioning. The controller automatically collects or instructs the operator to collect the operating data produced in the process, and analyzes the commissioning result automatically. This ensures the commissioning quality, simplifies the startup commissioning, and shortens the commissioning duration.  The embedded professional fault diagnosis system automatically locates the fault cause and instructs the operator to rectify the fault. This simplifies fault handling and improves efficiency.  The controller displays the current cooling load rate and recommended optimal water temperature (intelligently calculated to meet current load requirements), which helps lower the power consumption of chillers. Features  The controller provides a touchscreen with a user-friendly interface.  The controller is highly precise and responsive.  The controller is protected by a multi-level password protection mechanism, avoiding misoperations.  Password verification upon the first startup is required to ensure that the smart cooling product is started after valid authentication to avoid quality or security issues caused by unauthorized startup.  The LCD displays the margin of cooling capacity at the moment so that you can improve the operating efficiency of the equipment room.  The controller protects the smart cooling product against overvoltage, undervoltage, abnormal power failure, and water leakage, which ensures the reliable operation of the system.  The cooling capacity, air volume, as well as the operating status and runtime of each component in the smart cooling product are displayed on the LCD in real time.  The controller provides a professional fault locating system that automatically displays the root cause and maintenance policy for the fault, facilitating maintenance.  The controller provides abundant external ports such as FE ports, CAN ports, RS485 ports, and USB ports that are protected by a security mechanism. These ports flexibly meet the communication requirements and feature good electrical isolation (signal terminals will not break down or flash over within 1 minute at a 500 V DC voltage to ground).  The smart cooling product supports communications protocols such as Modbus RTU, Modbus TCP, and SNMP, facilitating connection to the NetEco.  The controller intelligently identifies abnormal parameter settings (incorrect commands) and rejects them automatically.  If the indoor temperature is out of the normal range, an audible and visible alarm signal is sent automatically.  Fans can be maintained without power-off so that the normal operations of other fans will not be affected. 2.2.3 Monitoring System The monitoring system provides logic control, data collection, control demand delivering, alarm reporting, data storage, user right management, and teamwork control functions.

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 19 The smart cooling product can interwork with the customer's monitoring system over an RS485 port or FE port on the monitoring system. If RS485 connection is used, the Modbus-RTU protocol is supported. If FE connection is used, the Modbus-TCP and SNMP protocols are supported. Key smart cooling product parameters, including but not limited to the temperatures and humidity of the supply and return air, power supply status, operating status, fan status, and alarms, can be uploaded to the monitoring system. Up to 32 smart cooling products can be connected over an FE port or a controller area network (CAN) port for teamwork to save energy and extend the service life. Any smart cooling product can be set as the master unit. The following figure shows the monitoring system network diagram. Figure 2-6 FE teamwork network diagram Figure 2-7 FE monitoring network diagram

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 20 Figure 2-8 Northbound RS485 monitoring network diagram Figure 2-9 CAN teamwork network diagram 2.3 Application Conditions  If the water inlet temperature exceeds 10°C or the total load is less than 30% of the cooling capacity of a single smart cooling product, the humidity may be high. The customer is advised to add a dehumidifier (engineering procurement).  Do not install the smart cooling product near a noise-sensitive place such as an office or a conference room. Pipe Ports The following table describes the ports reserved on the device.

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 21 Table 2-3 Pipe Ports Item Description Water outlet pipe G 1–1/2 in. port with inner threads Water inlet pipe G 1–1/2 in. port with inner threads (Optional) Humidifier water inlet pipe G 1/2 in. port with inner threads Automatic drainpipe BSPP 1/2 in. port with inner threads Installation Requirements Table 2-4 Installation Requirements Item Description Room door  2000 mm high: width ≥ 1.2 m, height ≥ 2.3 m. The cabinet may topple over in a short time.  2500 mm high: width ≥ 1.2 m, height ≥ 2.8 m. The cabinet may topple over in a short time. Floor Floor bearing capacity ≥ 530 kg/m2 Floor height ≥ 300 mm Pipe routing Bottom pipe routing Cabling mode Top cabling Drainage requirements Automatic drainage Water supply requirements of wet film The inlet water pressure should be in the range of 0.1–0.7 MPa (A reducing valve must be installed if the inlet water pressure exceeds 0.7 MPa.), and the temperature should be in the range of 1°C–40°C. The wet film humidifier should use tap water (no water treatment facility needed for the inlet water) that meets the following requirements:  Non-freezing and nephelometric turbidity units (NTU): < 3  No visible substances  6.5 ≤ pH value ≤ 8.5  Total hardness (in CaCO3): ≤ 450 mg/L Power distribution Leakage circuit breakers are not used for the main power route. If leakage circuit breakers are required by the customer or by local regulations, use the residual current

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 22 Item Description circuit breakers (RCCBs) that are not sensitive to the single-phase DC pulses and transient current pulses. Operating Specifications Table 2-5 Operating specifications Item Specifications Operating ambient temperature 4–55°C Operating humidity 5%–95% RH Inlet water temperature of chilled water or glycol solution 7–20°C (water, glycol solution) Requirements for humidifying water supply The inlet water pressure should be in the range of 0.1–0.7 MPa (A reducing valve must be installed if the inlet water pressure exceeds 0.7 MPa.), and the temperature should be in the range of 1°C–40°C. The wet film humidifier should use tap water (no water treatment facility needed for the inlet water) Storage temperature –40°C to +70°C Storage humidity 5%–95% RH (non-condensing) Altitude 0–1000 m: normal use; 1000–4000 m: derated Temperature adjustment range Return air: 18–45°C Supply air: 15–35°C Temperature adjustment precision ±1°C Humidity adjustment range 20%–80% RH Humidity adjustment precision ±5% RH Air outlet static pressure 0–50 Pa

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 23 2.4 Technical Specifications Table 2-6 Technical specifications of NetCol5000-C065 Item NetCol5000-C065H9B202 0030D0 NetCol5000-C065H9B202 W030D0 Power system 220–240 V AC, 1 PH, 50/60 Hz Number of fans 10 Cooling capacity (kW) 65 Air volume (m3/h) 10000 Water flow (m3/h) 12 Water pressure drop (kPa) 100 Humidification No Yes Humidification capacity (kg/h) 0 3 Maximum operating current (A) 15 Recommended upstream circuit breaker (A) 32 External dimensions (H x W x D, mm) 2000 x 600 x 1200 Air filter level G4 Net weight/Gross weight (kg) 200/234 202/236 Note: Rated working conditions are that the return air temperature is 37°C; the return air relative humidity is 24%; the supply/return water temperatures are 10°C/15°C respectively; and the static pressure outside the smart cooling product is 0 Pa. Table 2-7 Technical specifications of NetCol5000-C080 Item NetCol5000-C080H9B20200 30D0 NetCol5000-C080H9B2 02W030D0 Power system 220–240 V AC, 1 PH, 50/60 Hz Number of fans 12 Cooling capacity (kW) 80 Air volume (m3/h) 12000 Water flow (m3/h) 14

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 24 Item NetCol5000-C080H9B20200 30D0 NetCol5000-C080H9B2 02W030D0 Water pressure drop (kPa) 100 Humidification No Yes Humidification capacity (kg/h) 0 3 Maximum operating current (A) 17 Recommended upstream circuit breaker (A) 32 External dimensions (H x W x D, mm) 2500 x 600 x 1200 Air filter level G4 Net weight/Gross weight (kg) 238/268 240/270 Note: Rated working conditions are that the return air temperature is 37°C; the return air relative humidity is 24%; the supply/return water temperatures are 10°C/15°C respectively; and the static pressure outside the smart cooling product is 0 Pa. 2.5 Performance Curves Figure 2-10 and Figure 2-11 show the cooling capacity derating coefficient curve in proportion to the altitude when the NetCol5000-C works under rated power and air flow. Cooling Capacity Derating Coefficient Curve in Proportion to the Altitude Figure 2-10 Cooling capacity derating coefficient curve in proportion to the altitude When the altitude is within 1000 m, the cooling capacity deviation is in the tolerance range and can be ignored.

Cooling Product User Manual 2 Product Description Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 25 Cooling Capacity Curve in Proportion to the Glycol Solution Density The cooling capacity is obtained by multiplying the glycol solution density by the rated cooling capacity. Figure 2-11 Cooling capacity curve in proportion to the glycol solution density

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 26 3 Installation 3.1 Installation Precautions To ensure the optimal operating condition and longest service life, install the NetCol5000-C correctly as required.  Check whether the environment meets the requirements before installation, and whether reconstruction is needed for routing pipes and cables.  Install the NetCol5000-C according to the design drawing and reserve space for maintenance.  Reserve more than 1200 mm maintenance space at the front or rear of the smart cooling product and more than 1000 mm maintenance space at the other end. Figure 3-1 uses more than 1200 mm maintenance space at the front door and more than 1000 mm maintenance space at the rear door as an example.  Install the water inlet and outlet pipes to the predefined paths and reserve proper length for connecting water inlet and outlet pipes. Figure 3-1 Maintenance space

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 27 3.1.1 Tools Table 3-1, Table 3-2, and Table 3-3 list the main tools for installing the NetCol5000-C. Prepare tools based on site requirements. Table 3-1 General tools Appearance, Parameter, and Name Flat-head screwdriver Phillips screwdriver Adjustable wrench 36 mm (2 PCS) Socket wrench M10/M12 Hex key (5 mm) Open end torque wrench Diagonal pliers Wire stripper Crimping tool Torch Electrician's knife Step ladder (2 m) ESD gloves PVC insulation tape Vacuum cleaner Steel wire brush Multimeter Claw hammer Level Hot melt device (used when water pipes are made of PPR or aluminum-plastic material)

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 28 Appearance, Parameter, and Name Heat gun N/A N/A N/A N/A N/A N/A Table 3-2 Transportation tools Appearance, Parameter, and Name Diesel pallet truck Manual pallet truck N/A N/A N/A N/A Table 3-3 Nitrogen injection and pressure preservation tools Appearance, Parameter, and Name Nitrogen cylinder Pressure gauge Fluorine injection hose Reducing valve 3.1.2 Pipe Connection NetCol5000-C pipes are routed from the bottom onsite, as shown in Figure 3-2.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 29 It is recommended that you close the inlet valve in the unit when there is chilled water circulation in the system and the unit is not in use. Figure 3-2 Connection diagram for bottom pipe routing (1) Copper gate valve (2) Y-shaped strainer 3.1.3 Material Preparations Materials are classified to Huawei-provided, self-purchased, and onsite prepared materials, which are marked as mandatory, optional, and engineering purchasing in this document.  Mandatory: materials that are provided by Huawei and can be found in the delivered fittings.  Optional: materials that can be purchased from Huawei or any other vendor (if you have ordered the materials from Huawei, you do not need to purchase them elsewhere). For details about the specifications of such materials to be purchased, see the following sections.  Engineering procurement: materials that are not configured by Huawei and need to be purchased from another vendor. 3.1.3.1 Automatic Drainpipe The drainpipe supports the rigid pipe connection.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 30 Figure 3-3 Connecting an automatic drainpipe (1) Connector with inner screw threads: BSPP 1/2 inch; delivered with smart cooling products (2) Conversion adapter: BSPT 1/2 inch; connected to a rigid pipe with external threads (3) Rigid pipe: made of PP-R, C-PVC, or other materials The object shown in the dotted line box is the drainpipe connector with inner screw threads delivered with smart cooling products. Other parts are not provided and need to be purchased. 3.1.3.2 (Optional) Condensate Pump Drainpipe If condensate water needs to be drained by using a water pump, you can customize a condensate pump. The water pump drainpipe uses the hose connection, as shown in the following figure.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 31 Figure 3-4 Connecting a water pump drainpipe (1) Water pump port with an outer diameter of 9.8 mm (2) Hose clamp (3) Hose (inner diameter of 9 mm; made of EPDM or other materials) The object shown in the dotted line box is the water pump port supplied with the smart cooling product. Other parts are not provided and need to be purchased. 3.1.3.3 (Optional) Humidifier Water Inlet Pipe The humidifier water inlet pipe can be connected using a hose or a rigid pipe. Figure 3-5 shows how to connect the pipe. Figure 3-5 Connecting a water inlet pipe (1) Connector with inner screw threads: G 1/2 inch, delivered with the water inlet pipe for the smart cooling product (2) Rigid pipe conversion adapter: G 1/2 inch; connected to a rigid pipe with outer screw threads (3) Rigid pipe: made of PP-R or other materials (4) Pagoda connector: G 1/2 inch; connected to a pagoda connector with outer screw threads (5) Hose clamp (6) Hose: made of EPDM or other materials

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 32 The object shown in the dotted line box is the water inlet pipe connector with inner screw threads delivered with smart cooling products. Other parts are not provided and need to be purchased. 3.1.3.4 Chilled Water Inlet and Outlet Pipes The following illustrates how to connect water inlet and outlet pipes to reserved ports on the cabinet. Figure 3-6 Connecting the water inlet and outlet pipes (1) G 1–1/2 in. port with inner threads (reserved device port) (2) Seamless steel pipe with a G 1–1/2 in. external threaded connector (engineering purchase) (3) Direct connection of external teeth (engineering purchase) (4) Sealing ring (5) Nut (6) Aluminum plastic pipe with an inner diameter of 41 mm (engineering purchase) 3.1.3.5 Pipe Support Supports for pipes and water pipes as shown in the figure. The actual appearance of the supports will be different based on onsite situations.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 33 Figure 3-7 Pipe supports (unit: mm)  The height of the U-shaped pipe clamp is 5 mm less than the pipe diameter (including the thermal insulation foam).  Install a support every 2500 mm for the straight sections of pipes, and 1000 mm away from each bending point in turning sections. 3.1.3.6 Cables The cable flame spread rating must be at least VB. The following lists the cables and devices to be connected. When connecting cables, fit them with protective hoses. Table 3-4 Cables and switches required Name Specifications Quantity Remarks Power cable Electronic|Electric Cable, 600 V/1000 V, ZA-RVV, 3 x 6 mm2, Black (3 Cores: Brown, Blue, Yellow/Green), 46 A, Outdoor Cable, CE 2 PCS Optional; same cable parameters for the active and standby routes Teamwork networking and monitoring cable Signal cable, Shielded straight-through cable, 10 m, MP8-II, CC4P0.5GY (S), MP8-II, FTP 1 PCS Optional Fuse Slow Blow Fuse, 250 V, 4 A, IEC Specification, 0.03 ohm, 38.7 A x A x Sec, UL/CSA Approved 2 PCS Standard configuration; delivered with the product OT terminal Naked Crimping Terminal, OT, 6 mm2, 6 PCS Standard configuration; delivered with the

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 34 Name Specifications Quantity Remarks M6, Tin Plating, Insulated Ring Terminal, 12-10 AWG, yellow product Cord end terminal Common Terminal, Conductor Cross Section 6 mm2, Length 20 mm, Insertion Depth 12 mm, Black 12 PCS Standard configuration; delivered with the product Cable tie G200IUV (3.6 x 200), Anti-Ultraviolet and Anti-Freeze, Black 15 PCS Standard configuration; delivered with the product 3.1.4 Structural Specifications 3.1.4.1 NetCol5000-C065 external structure Figure 3-8 NetCol5000-C065 external structure (1) Controller panel (2) Door lock (3) Front door (4) Side panel (5) Rear door

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 35 3.1.4.2 NetCol5000-C080 external structure Figure 3-9 NetCol5000-C080 external structure (1) Controller panel (2) Door lock (3) Front door (4) Side panel (5) Rear door 3.1.4.3 Cabinet Holes Figure 3-10 Top view (unit: mm) (1) Power cable hole (2) Signal cable hole

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 36 Figure 3-11 Bottom view (unit: mm) (1) Humidifier water inlet pipe hole (2) Automatic drainpipe hole (3) Equipotential PE cable hole (4) Forcible drainpipe hole (Optional) (5) Chilled water outlet pipe hole (6) Chilled water inlet pipe hole 3.2 Unpacking Prerequisites To avoid damage during transportation, move the smart cooling product closest to the installation position before unpacking. Procedure Step 1 Inspect the outer packaging for signs of damage. If any damage is found, contact the shipping company immediately. Step 2 Remove the packaging. 1. Cut off the straps and remove the cartons. 2. Inspect the cabinet exterior for signs of collision or scratches. If any damage is found, contact the shipping company immediately. Step 3 Check the type and quantity of fittings against the packing list. If fittings are missing or inconsistent with those in the packing list, contact your local Huawei office immediately. ----End

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 37 3.3 Installation Process Remove the protective plastic bag from the cabinet only immediately before installation. Do not remove the bag during equipment room renovation or infrastructure construction; otherwise, dust may enter the cabinet and affect the internal components. Figure 3-12 Installation flowchart 3.4 Checking the nitrogen pressure Context  The device has been injected with 0.3–0.5 MPa nitrogen before delivery. Check the nitrogen pressure for nitrogen leakage.  You can open or close the exhaust valve using a flat-head screwdriver. Procedure Step 1 Open the door lock using a key, and open the cabinet rear door. Step 2 Unfasten the rotating baffle plates, and remove the air filters.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 38 Figure 3-13 Removing an air filter Step 3 Take out the desiccant bag. Step 4 Press and hold the manual adjustment switch and manually turn the chilled water valve to the 100% state, as shown in Figure 3-14. Figure 3-14 Adjusting the chilled water valve Step 5 Use a screwdriver to open the exhaust valve shown in Figure 3-15 and discharge gas through the hose.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 39  If gas emits, the system is normal. Slowly open the exhaust valve to discharge nitrogen and close the valve when there is no airflow through the valve.  If no gas emits out of the valve, contact Huawei technical support. Figure 3-15 Checking the nitrogen pressure ----End Follow-up Procedure Check that thermal insulation foam is in close contact with the pipes, there is no crack in each cutting position, and the chilled water valve is tightly wrapped by thermal insulation foam. 3.5 Removing the Pallet Procedure Step 1 Remove the connecting kit that secures the cabinet to the pallet from the bottom of the two side panels of the cabinet, as shown in Figure 3-16.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 40 Figure 3-16 Removing the connecting kit that secures the cabinet to the pallet 1. Use a 10# socket wrench to remove eight M6x16 bolts that secure the connecting kit to the cabinet. 2. Use an 18# socket wrench to remove four M12x35 bolts that secure the connecting kit to the pallet. 3. Remove the connecting kit. Save the removed bolts for future use. Step 2 Transport the cabinet to the specified position. You are advised to use a pallet truck to transport devices. Exercise caution when moving the cabinet to prevent falling down. ----End 3.6 Leveling and Combining Cabinets Procedure Step 1 Level the cabinet. Use a socket wrench to adjust the leveling feet at the bottom of the smart cooling product, and use a measuring tape and a level to adjust the horizontal and vertical distances of the smart cooling product. Ensure that the leveling feet touch the floor after adjustment, as shown in Figure 3-17.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 41 Figure 3-17 Leveling a cabinet  Wrench an anchor bolt clockwise to elevate a cabinet, wrench an anchor bolt anticlockwise to lower a cabinet. The leveling feet can be adjusted within a range of 0–8 mm.  To prevent damaged caused by cabinet tilt, adjust all the leveling feet at the four corners instead of one foot.  Use a measuring tape to check that the vertical distance between the top of the cabinet and the floor is 2000 mm±2 mm or 2500 mm±2 mm.  Do not remove the leveling feet. Otherwise, you need to rework them for use. Step 2 Combine cabinets, as shown in the following figure. Figure 3-18 Combining cabinets (front door)

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 42 Figure 3-19 Combining cabinets (rear door) 1. Remove the connecting kits from the cabinets. 2. Secure the connecting kits at the connection positions on the front door using screws. Step 3 Secure the connecting kits at the connection positions on the rear door using screws in the same way. Ensure that the vertical distance between each device top and the floor is 2000 mm (±2 mm) or 2500 mm (±2 mm) and that all device tops are on the same plane. ----End 3.7 Securing the NetCol5000-C Secure the smart cooling product to the base. If there are no bases onsite, prepare one by referring to C Base Dimensions. 3.8 Connecting Water Pipes 3.8.1 Connect Automatic Drainpipe Context

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 43  The external drainpipe must have a certain gradient (> 1:50), and no accumulated water is allowed.  The entire drainpipe should be closely wrapped with thermal insulation foam.  The drainpipe can be secured along the door post using cable ties inside a cabinet.  The water pump drainpipe and the automatic drainpipe should not be connected together to the external drainage system. Procedure Step 1 Remove the drainpipe plug. Figure 3-20 Connecting an automatic drainpipe Step 2 Install a pipe adapter and seal it with sealant. Step 3 Connect the PPR water pipe using a heat gun and wrap the pipe with thermal insulation foam. Step 4 Connect the drainpipe to the external drainage system. ----End Follow-up Procedure After installing the condensate pump drainpipe and automatic drainpipe, connect them to the main pipe and bind them with a cable tie according to step 1 in Figure 3-21. Then wrap the pipes with tape or use other materials to secure them, as shown by step 2 in Figure 3-21.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 44 Figure 3-21 Fastening pipes 3.8.2 (Optional) Connecting the Water Pump Drainpipe Context  Do not bend pipes by a large angle when securing pipes. The water pump drainpipe needs to be wrapped with thermal insulation foam and the water pump inlet pipe does not need thermal insulation foam.  In the cabinet, fasten the pipe to vertical pillar of rear door with cable ties. Procedure Step 1 Use a Phillips screwdriver to loosen the screw on the connector of the water pump drainpipe to loosen the hose clamp, and remove the plug of the drainpipe. Step 2 Connect the hose, and use a Phillips screwdriver to re-tighten the screw on the water pump drainpipe to secure the hose clamp.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 45 Figure 3-22 Water pump drainpipe Step 3 Connect the water pump drainpipe to the external drainage system. Step 4 Wrap the water pump drainpipe with thermal insulation foam. ----End 3.8.3 (Optional) Connecting the Humidifier Water Inlet Pipe Context  A reducing valve must be installed if the inlet water pressure exceeds 0.7 MPa.  Appliance is intended to be permanently connected to the water mains and not connected by a hose-set. Procedure Step 1 Straighten the water inlet pipe delivered with the smart cooling product, and route it from the inside to the outside through the water inlet hole at the bottom of the smart cooling product.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 46 Figure 3-23 Downward routing of the water inlet pipe The other end is a reserved G 1/2 inch connector with inner screw threads. Connect the other end to a hose or rigid pipe based on site requirements. Step 2 Clean the engineering pipes before connecting the water inlet pipe to the engineer pipe to avoid impurities entering into the humidifier. Step 3 Connect the water inlet pipe to the engineer pipe and wrap the pipe with thermal insulation foam. ----End 3.8.4 Connecting the Chilled Water Inlet and Outlet Pipes Context  A Y-shaped strainer has been installed on the chilled water inlet.  Connect the water inlet and outlet pipes from the inside to the outside and from the bottom to the top.  Water inlet and outlet pipes are connected using thread connectors.  Chilled water inlet and outlet pipes can be connected in two ways. Select one based on site requirements. 3.8.4.1 Connecting Seamless Steel Pipes Procedure Step 1 Open the rear door and remove the air filter. Step 2 Knock off the knock-out holes for the chilled water inlet and outlet pipes.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 47  Ensure that pipes and power cables are routed through separate holes.  Do not prepare extra knock-out holes to avoid performance loss. Step 3 Remove the water pipe plug using an open-end wrench. Step 4 Apply screw thread sealant evenly on the connecting position of external screw threads at pipe ends, and install the pipes from inside out. Step 5 Use a common wrench (open end: 53 mm) and trimo wrench (18#) to connect and secure water inlet and outlet pipes. Step 6 Attach thermal insulation foam to the pipes and ensure that the foam is in close contact with the pipes. Step 7 After pipes are connected, seal the gaps between the knock-out holes and the pipes using sealant or foaming agent. Figure 3-24 Connecting the water inlet and outlet pipes ----End 3.8.4.2 Connecting Aluminum Plastic Pipes Procedure Step 1 Open the rear door and remove the air filter. Step 2 Knock off the knock-out holes for the chilled water inlet and outlet pipes.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 48  Ensure that pipes and power cables are routed through separate holes.  Do not prepare extra knock-out holes to avoid performance loss.  In connecting the pipes, ensure that the aluminum plastic pipes are in proper contact with the straight male connectors.  In connecting the pipes, avoid violent shake. Step 3 Remove the water pipe plug using an open-end wrench. Step 4 Apply screw thread sealant evenly on the connecting position of external screw threads of the straight male connector shown in Figure 3-6, and use a torque wrench (recommended torque: 130±10 N·m) and a common wrench (open end: 53 mm) in collaboration to secure the straight male connector to the connector on the device. Step 5 Install the sealing ring and nut shown in Figure 3-6 at the end of the aluminum plastic pipe that ran through the hole rubber ring. Step 6 After the aluminum plastic pipe and the straight male connector are connected, secure them to the aluminum plastic pipe with the installed sealing ring and nut, as shown in the following figure. Step 7 Attach thermal insulation foam to the pipes and ensure that the foam is in close contact with the pipes. Step 8 After pipes are connected, seal the gaps between the knock-out holes and the pipes using sealant or foaming agent. Figure 3-25 Connecting the water inlet and outlet pipes ----End

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 49 3.9 (Optional) Performing a Leakage Test with Nitrogen Prerequisites You can decide whether a leakage test with nitrogen needs to be performed or not based on the site situation. Pipes have been properly connected. Procedure Step 1 Manually turn the chilled water valve to the maximum (100%), as shown in Figure 3-14. Step 2 Connect a reducing valve, pressure gauge, and nitrogen cylinder to any needle valve of the smart cooling product, as shown in Figure 3-26. Inject 0.8 MPa nitrogen (the pressure should reach 0.8 MPa after it is stabilized), and keep it for 24 hours. Figure 3-26 Injecting nitrogen Step 3 After 24 hours, if the pressure drop is less than 0.01 MPa, the pipes do not leak. Open the exhaust valve using a screwdriver, and close the valve when there is no airflow through the valve. Then you can perform the following operations. Step 4 After the leakage test has been performed and gas has drained, re-wrap the needle valve with thermal insulation foam. ----End Exception Handling  If the pressure decreases, find out and repair the leakage point by using soap bubbles.  If the pressure is preserved properly, exhaust nitrogen and wrap pipes and joints with thermal insulation foams. ----End

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 50 3.10 Injecting Water to Expel Gas Prerequisites  Nitrogen must be expelled before injecting water.  To avoid blockage of the heat exchanger in the smart cooling product due to foreign matter from the main pipe during the construction, you are advised to clean the main pipe before water is supplied to the smart cooling product. Turn off the isolation valves on the water inlet and outlet pipes before the cleaning and turn them on afterwards. Procedure Step 1 Ensure that the needle valve and exhaust valve on the pipe are closed and the chilled water valve is in the 100% state, as shown in Figure 3-27. Figure 3-27 Adjusting the chilled water valve Step 2 Open the main water inlet valve. Step 3 Gradually open the exhaust valve, as shown in Figure 3-15. Air and chilled water flow out of the exhaust hose together. Step 4 Adjust the air exhausting speed until no bubble flows out of the hose. Step 5 After air is expelled, manually turn the chilled water valve to the 0 state. Step 6 Close the exhaust valve. ----End

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 51 3.11 (Optional) Leakage Test with Water  If the leakage test has been done with nitrogen, skip the test with water.  Ensure that the indoor temperature is always above 0°C during the leakage test with water, otherwise, the pipes may experience frost cracks. If the indoor temperature is below 0°C, take anti-freezing measures for the pipes. Manually open the chilled water valve. Inject water to 0.8 MPa, and preserve the pressure for 24 hours. Then connect a pressure gauge to a needle valve on the pipeline to measure the pressure. If the reading remains unchanged, the pipe is not leaking. You can perform the following operations. 3.12 Cable Connections 3.12.1 Overview and Precautions Precautions  Connections of all power cables, control cables, and ground cables must comply with the local electrical code, and the cable specifications should comply with the local cabling specifications.  For details about the maximum current, see the equipment nameplate.  Ensure that the voltage and frequency of the primary power supply meet the requirements.  Only trained and qualified personnel are allowed to connect cables.  Before connecting cables, use a multimeter to measure the input voltage and ensure that the power supply is off.  Ensure that all smart cooling products are safely grounded before powering them on.  Keep cables away from the fan, and so on (if unavoidable, take protective measures), and ensure that cables are securely connected.  When laying out cables, ensure that the power and signal cables are reliably separated and that the strong- and weak-current cables are bound separately. 3.12.2 Connecting Power Cables Prerequisites Check that the voltage is less than 1 V between wires by using a multimeter before connecting power cables.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 52 Procedure Step 1 Take out OT terminals and cord end terminals from the fittings bag, and prepare cables.  Crimp the cables firmly and ensure that they are not loose after pulling.  If the cables are not recommended specifications, you need to prepare the terminals by yourself. Step 2 Connect power cables, as shown in the following figure. Exercise caution while connecting cables. Prepare protective tools in advance. Figure 3-28 Connecting power cables 1. Connect the cables with crimped terminals to the L, N, and PE shown in Figure 3-28. 2. Remove screws from both ends of the clip to remove it. 3. Place the connected power cables vertically, use the clip to secure them in a proper position, and use screws to secure the clip. 4. Fasten the power cable to the vertical pillar by cable ties every 150 mm to 200 mm. Step 3 Use a multimeter to check for a short circuit between L and N of AC1 and AC2. Use a multimeter to check for a short circuit between L, N, and PE.  If there is a short circuit, remove the cable and reconnect it using the method described in Step 2.1. After verifying the connection, perform Step 4.  If there is no short circuit, perform Step 4. Step 4 Check that the cable connections are secure.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 53  If the cable connections are loose, fasten the connections.  If the cable connections are secure, the connection is complete. ----End 3.12.3 Connecting an Equipotential PE Cable Smart cooling product resistance to ground ≤ 0.1 ohm. Connect the PE cable to the marked position in the lower part of the cabinet, and connect the cable to the external ground system, as shown in Figure 3-29. Figure 3-29 Connecting an equipotential PE cable

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 54 3.12.4 Teamwork Networking and Monitoring 3.12.4.1 Main Control Panel Figure 3-30 Main control panel (1) T/H_1 (T/H RS485 communications port) (used for connecting to the external temperature and humidity sensor) (2) T/H_2 (T/H RS485 communications port) (used for connecting to the external temperature and humidity sensor) (3) CAN_IN (CAN communications port) (used for teamwork networking) (4) CAN_OUT (CAN communications port) (used for teamwork networking) (5) COM_IN (RS485 communications port) (used for connecting to the monitoring system) (6) COM_OUT (RS485 communications port) (used for connecting to the monitoring system) (7) FE (used for connecting to the monitoring system)

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 55 3.12.4.2 Signal Ports Figure 3-31 Signal ports (1) Common alarm 2 (ALM_2 COM) (2) Common alarm 2 (ALM_2 NO) (3) Common alarm 1 (ALM_1 COM) (4) Common alarm 1 (ALM_1 NO) (5) External water sensor (Water -) (6) External water sensor (Water +) (7) Remote on/off (Remote COM) (8) Remote on/off (Remote +) (9) Smoke sensor (Smoke AI) (10) Smoke sensor (Smoke 12VDC) 3.12.4.3 Connecting the Teamwork Network Cable  Smart cooling products in a teamwork group must be of the same model.  The default networking mode is CAN networking.  The smart cooling product supports two teamwork networking modes: FE teamwork networking and CAN teamwork networking (hand-in-hand). 3.12.4.3.1 Connecting the FE Teamwork Network Cable Procedure Step 1 (Optional) Make FE teamwork network cables by referring to Figure 3-32 if required onsite.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 56 Figure 3-32 Pin sequence of FE network cable Step 2 Connect one end of the FE network cable to the FE port on the main control module, as shown by 7 in Figure 3-30, and connect the other end to the POE port on the smart ETH gateway, as shown in Figure 3-33. Figure 3-33 Connecting the FE teamwork network cable ----End 3.12.4.3.2 Connecting the CAN Teamwork Cable Context In CAN networking, one teamwork network supports a maximum of 32 smart cooling products. If CAN networking is required onsite, set Teamwork CAN resistor enable on the Teamwork settings page for the first and last smart cooling products to Yes.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 57 Procedure Step 1 Use a CAN teamwork cable to connect the CAN_OUT port on a smart cooling product to the CAN_IN port on the following smart cooling product, as shown in Figure 3-35. Figure 3-34 Pin sequence of a CAN teamwork cable Figure 3-35 Connecting a CAN teamwork cable ----End 3.12.4.4 Connecting the Monitoring Network Cable The smart cooling product supports both RS485 and FE monitoring. 3.12.4.4.1 Connecting the FE Monitoring Network Cable (SNMP/Modbus-TCP) The FE monitoring and FE teamwork control use the same network cable. For the connection method, refer to 3.12.4.3.1 Connecting the FE Teamwork Network Cable. 3.12.4.4.2 Connecting the RS485 Monitoring Network Cable (Modbus-RTU) When monitoring smart cooling products over northbound RS485, the EMS needs 4 seconds to collect data from one smart cooling product. Therefore, the time required for collecting data from N smart cooling products in a group is 4 x N. If the data collection time is longer than the performance requirement, you can divide the smart cooling products into several groups. For example, if the EMS needs to finish data collection in 16 seconds, you are advised to group smart cooling products by four and connect the COM–IN port of the main control module of the first smart cooling product in each group to the RS485 port of the EMS.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 58 (Optional) Make the RS485 monitoring network cable by referring to Figure 3-36 if required onsite. Figure 3-36 Pin sequence of an RS485 monitoring network cable  The figure shows the connection diagram of monitoring network cables when 32 smart cooling products are teamworked with four in each group connected to the host respectively. The number of smart cooling products in each monitoring group can be adjusted based on performance requirements.  In CAN networking, a maximum of 32 smart cooling products can be teamworked. If CAN networking is required onsite, set Teamwork CAN resistor enable for the first and last smart cooling products to Yes over the LCD. If CAN teamwork networking has been implemented, connect the RS485 monitoring cables, as shown in the following figure. Figure 3-37 Connecting the RS485 monitoring network cable

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 59 3.12.5 Connecting the Water Sensor Context A water sensor monitors resistance changes at terminals to determine whether the floor is watery. When the terminals of a water sensor detect water or other conductive liquid, resistance between the two terminals decreases. Keep water sensors far away from water traps or floor drains. Procedure Step 1 Connect one end of the water sensor cable to the water sensor. Step 2 Connect the other end of the water sensor cable to Water– and Water+ on the water sensor at the signal port through the signal cable hole at the top of the cabinet. Step 3 Secure the cable to the left post of the cabinet using cable ties. Place the sheet metal of the water sensor upwards and its detection board downwards on the ground. ----End 3.12.6 Connecting the T/H Sensor Outside the Cabinet Context T/H sensors outside the cabinet are configured to detect the temperatures of cold/hot aisles. They can be flexibly installed on the server cabinet based on onsite situation. It is recommended that the T/H sensors be deployed near heat sources in the hot aisle, or in places which lacks cooling air in the cold aisle. The T/H sensors outside the cabinet must be near the smart cooling product to sense the temperature of the outlet air, and must be away from the air exhaust vents of other smart cooling products Procedure Step 1 Connect the T/H sensors outside the cabinet and the T/H sensors at the return air side in series. Figure 3-38 shows how to route the cables.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 60 Figure 3-38 Cables routed outside the cabinet  The T/H sensors inside the cabinet are secured at the return air side and their IN ports are connected to the main control board. When connecting the T/H sensors outside the cabinet, connect the OUT port of one T/H sensor inside the cabinet to the IN port of the next T/H sensor outside the cabinet. Connect all T/H sensors in series in this way.  The T/H sensors should be 1.5 m above the ground (33 U).  Each smart cooling product supports a maximum of ten T/H sensors. Step 2 Table 3-5 shows how to set the DIP switches for T/H sensors. Figure 3-39 DIP switches Table 3-5 DIP switch setting on a T/H sensor Position Name Address DIP Switch ID 1 2 3 4 5 6 Return air Return air 2 temp/humid 1 ON OFF OFF OFF OFF OFF Cold aisle Cold aisle 1 11 ON ON OFF ON OFF OFF

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 61 Position Name Address DIP Switch ID 1 2 3 4 5 6 temp/humid Cold aisle 2 temp/humid 12 OFF OFF ON ON OFF OFF Cold aisle 3 temp/humid 13 ON OFF ON ON OFF OFF Cold aisle 4 temp/humid 14 OFF ON ON ON OFF OFF Cold aisle 5 temp/humid 15 ON ON ON ON OFF OFF Hot aisle Hot aisle 1 temp/humid 21 ON OFF ON OFF ON OFF Hot aisle 2 temp/humid 22 OFF ON ON OFF ON OFF Hot aisle 3 temp/humid 23 ON ON ON OFF ON OFF Hot aisle 4 temp/humid 24 OFF OFF OFF ON ON OFF Hot aisle 5 temp/humid 25 ON OFF OFF ON ON OFF  The default addresses of T/H sensors purchased from Huawei are 1.  Keep the last RS485_R toggle switch at OFF.  After the addresses are set, power on the device. On the display's home screen, choose Settings > System Settings > T/H Sensor and set the sensors in the aisles corresponding to the addresses to Enable. Otherwise, the sensors will not work. ----End 3.12.7 (Optional) Installing a Differential Pressure Sensor Procedure Step 1 Secure the differential pressure sensor and the fasteners using M5 tapping screws, as shown in step 1 in Figure 3-40.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 62 Figure 3-40 Securing a differential pressure sensor Step 2 Connect the pressure inlet tube.  Cold aisle containment: Connect a pressure inlet tube to the + mark and route it to the aisle through the hole on the top of the cabinet. Ensure that the pressure inlet faces downwards. Connect another pressure inlet tube to the – mark and route it to the cabinet top through the hole atop.  Hot aisle containment: Connect a pressure inlet tube to the + mark and route it to the cabinet top through the hole atop. Connect another pressure inlet tube to the – mark and route it to the aisle through the hole on the top of the cabinet. Ensure that the pressure inlet faces downwards. Step 3 Connect the cable terminal of thedifferential pressure sensor to the DPT terminal. ----End 3.13 Checking After Installation 1. Check the drainpipes are securely installed, clear, free of leakage, and not over bent. 2. Check that the chilled water connector joints have been tightly wrapped with thermal insulation foam, and no metal or hose is exposed. 3. Check that the liquid level detector is horizontal, that the water pan is free of foreign matter, such as residual cables and thermal insulation foam, and that the cables are secured bound and not in the water pan. 4. Check that the distance between two chilled water pipes outside the cabinet is sufficient (recommended distance: longer than 25 mm), the hose is tightly wrapped with insulation foam, and that junctions are secured using glue. 5. Check that the pipe lines have completed pressure preservation and air tightness test. 6. Check that the needle valve plugs and the nuts are tightened.

Cooling Product User Manual 3 Installation Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 63 7. Check that the cabinet is grounded. 8. Check that the power and signal cables are routed correctly and separately. 9. Check that strong- and weak-current cables are bound separately.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 64 4 Commissioning 4.1 Power-On Procedure Step 1 Turn on the smart cooling product switch in the power distribution cabinet and the AC1 and AC2 switches on the smart cooling product. Step 2 After the system is powered on for the first time, the Quick Settings screen is displayed. Log in as the admin user, as shown in Figure 4-1. Figure 4-1 Initial power-on Table 4-1 Preset password User Preset Password Permission Description admin (administrator user) 000001 People can operate all menus. operator (common user) 000001 People can only view parameter settings and set a part of parameters in the menus.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 65  The operator user can access customer and delivery parameters. Parameters in the advanced menu are the delivery parameters. The admin user can access customer, delivery, maintenance, and R&D parameters. Parameters in the advanced menu are the R&D parameters.  To prevent the effect of misoperation on the system during the O&M, log in as the operator user first before modifying parameters. Confirm with Huawei before modifying parameters that cannot be modified by operator users; otherwise, Huawei will not be liable for any consequences of the unauthorized modification.  Only certified pros are allowed to modify the advanced parameters. Unauthorized modifications may lead to device malfunction or damage.  After the first login, change the password in time to ensure account security and prevent unauthorized network attacks, such as data tampering. Huawei will not be liable for any security issues caused by your failure to change the preset password in time or password loss after changing.  After login, you are allowed to perform operations until being logged out if no operation is performed within 3 minutes (user set). For security purposes, tap at the lower-right corner of the screen to manually log out after you have completed all operations. Step 3 Figure 4-2 shows how to configure relevant parameters. Click Next until the LCD home screen is displayed after the configuration. Figure 4-2 Quick Settings Table 4-2 Parameter description Menu Parameter Description Configuration Principle Select Language / Choose language of the ACC Set the parameter according to the actual situation.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 66 Menu Parameter Description Configuration Principle Date & Time Settings Date format Specifies the date display format for the ACC. Set the parameter according to reading habits. Date settings Specifies the date displayed on the ACC. Set the parameter according to the actual situation. Time Specifies the time displayed on the ACC. Set the parameter according to the actual situation. Time zone Specifies the time zone displayed on the ACC. Set the parameter according to the actual situation. Teamwork Settings (visible for V200R002 version) Teamwork group No. Set the assigned teamwork control number. The number of the teamwork controlled group, which is the same for all the devices in the group. Air conditioner address Set the assigned unit address. Air conditioner addresses should be different from each other. Teamwork function Disable or enable the teamwork function. If the teamwork function is disabled, this device is operating according to its own control. If the teamwork function is enabled, this device works in harmony with others that in the same group. Set this parameter based on the onsite device heat distribution. Networking mode Networking mode for the teamwork. The networking mode set on the screen must be consistent with the actual networking mode. Otherwise, the teamwork control function will be unavailable. Networked over CAN or MAC_CAN. CAN network indicates teamwork control over a CAN bus, MAC_CAN network teamwork control over an FE port. Number of smart cooling products in Number of the smart cooling products in this group (1 to 32 Total number of the smart cooling products in this group.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 67 Menu Parameter Description Configuration Principle this group can be set). Number of running smart cooling products in this group Number of active units in a group. The value ranges from 1 to Number of smart cooling products in this group. The host allocates running units by smart cooling product unit address in ascending order, which is from 1 to 32. The rest will become the standby ones. System Settings (visible for V200R002 version) Humidifying function The humidifying function can be set to Enable, Disable, or Enabled when active power. Enable indicates that the electric humidifier will be started when the ambient humidity is lower than the certain humidity range of the humidity set point. Disable indicates that the electric humidifier will not be started. Enabled when active power indicates that the electric humidifier will be started when the main power is active and the ambient humidity is lower than the certain humidity range of the humidity set point. Dehumidifyi ng function The dehumidifying function can be set to Enable, Disable, or Enabled when active power. Enable indicates that the dehumidification function will be enabled when the ambient humidity exceeds the certain humidity range of the humidity set point. Disable indicates that the dehumidification function will not be enabled. Enabled when active power indicates that the dehumidification function will be enabled when the main power is active and the ambient humidity exceeds the certain humidity range of the humidity set point. T/H sensor (visible for V200R002 version) Temperature and humidity control type Cold aisle, Hot aisle, Return air, or Supply air can be set as required. The temperature and humidity set points correspond to the selected control type can be set.  When the application scenario is cold or hot aisle containment, you are advised to choose Cold aisle if the cold aisle T/H sensors are configured, and choose Supply air if the cold aisle T/H sensors are not configured.  When the application scenario is non-aisle containment, you are advised to choose Return air, and

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 68 Menu Parameter Description Configuration Principle choose Cold aisle if the cold aisle T/H sensors are configured.  Hot aisle is not recommended. Temperature control mode This parameter controls the temperature inside the room or aisles based on the Average value, Max value, or Min value of the temperatures collected by each sensor.  Average value: Select Average value if the temperature is to be controlled based on the averaged data value collected by the collector.  Max value: Select Max value if the temperature is to be controlled based on the maximum data value collected by the collector.  Min value: Select Min value if the temperature is to be controlled based on the minimum data value collected by the collector. Temperature setpoint After the Temperature and humidity control type and the temperature value under this type are set, the device conducts cooling or heating based on the settings. Set this parameter as required.  Return air temperature: 26–35°C recommended  Supply air temperature: 18–24°C recommended  Cold aisle temperature: 18–24°C recommended  Hot aisle temperature: 26–35°C recommended Humidity setpoint After the Temperature and humidity control type and the humidity value under this type are set, the device conducts humidifying or dehumidifying based on the settings. Set this parameter as required. 40%–60% RH recommended Cold aisle sensor 1 Cold aisle sensor 2 Cold aisle sensor 3 The sensors in cold aisles can be set to Enable or Disable. The cold aisle sensors outside the cabinet need to be enabled when they are installed.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 69 Menu Parameter Description Configuration Principle Cold aisle sensor 4 Cold aisle sensor 5 Hot aisle sensor 1 Hot aisle sensor 2 Hot aisle sensor 3 Hot aisle sensor 4 Hot aisle sensor 5 The sensors in hot aisles can be set to Enable or Disable. The hot aisle sensors outside the cabinet need to be enabled when they are installed. Comm Settings (visible for V200R002 version) Modbus Comm address Set the communication address of the smart cooling product as planned. The EMS communicates with the smart cooling product through this address. The communication addresses of two smart cooling products connecting to the same EMS must be unique. ----End 4.2 Home Screen You can tap the menu items, buttons, or icons on the screen to enter related screens or perform operations, such as Running, Alarms and Settings. The controller main screen is shown in Figure 4-3. User interfaces displayed in this document are for reference only.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 70 Figure 4-3 Home screen Table 4-3 Note for the page No. Items Note 1 Permission status indicates that you have not logged in to the system. indicates that you have logged in to the system as an operator user. indicates that you have logged in to the system as an admin user. 2 USB status in the status bar indicates that the USB flash drive is successfully connected to the display panel. 3 Diagnostic mode in the status bar indicates that the smart cooling product is in diagnostic mode. Tap the icon to exit from the diagnostic mode. 4 The buzzer status The buzzer status can be set to On or Off. The icon indicates that the buzzer is on. When the buzzer is on, it buzzes when an alarm is generated. When the buzzer is buzzing, you can tap anywhere on the screen to mute the buzzer. After the buzzer is muted, it still buzzes when a new alarm is generated. The icon indicates that the buzzer is off (silenced). After the buzzer is silenced, it does not buzz when an alarm is generated. 5 The current critical alarm and their quantity refers to the current critical alarm and their quantity. 6 The current major alarm and their quantity refers to the current major alarm and their quantity.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 71 No. Items Note 7 The current minor alarm and their quantity (visible for V200R002 version) refers to the current major alarm and their quantity. 8 The current warning alarm and their quantity refers to the current warning alarm and their quantity. 9 The status bar N/A 10 The alarm bar You can tap in the alarm bar to enter the active alarm screen that displays all active alarms. 11 Login button / Logout button indicates that you have not logged in to the system, and can tap the icon to log in. indicates that you have logged in to the system as admin or operator user, and can tap the icon to log out. 12 Teamwork control button indicates that there is no teamwork control at present. indicates that there is teamwork control without alarms at present. indicates that there is teamwork control with alarms at present. 4.3 Initial Configuration 4.3.1 Setting Temperature and Humidity Values and (Optional) Enabling T/H Sensors Prerequisites  The T/H sensors outside the cabinet need to be enabled when they are installed, otherwise, skip Step 2.  If you need to enable a humidity and temperature sensor, log in as the admin user.  This section describes how to enable Cold aisle sensor 1. Procedure Step 1 On the home screen, choose Settings > System Settings > T/H sensor. Figure 4-4 is displayed.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 72 Figure 4-4 Setting temperature and humidity values Step 2 Set Cold aisle sensor 1 to Enable. Step 3 Set the temperature and humidity values by referring to Table 4-4. You are not recommended to modify the parameters not listed in Table 4-4. Table 4-4 Parameter description Parameter Description Configuration Principle Temperature and humidity control type Cold aisle, Hot aisle, Return air, or Supply air can be set as required. The temperature and humidity set points correspond to the selected control type can be set.  When the application scenario is cold or hot aisle containment, you are advised to choose Cold aisle if the cold aisle T/H sensors are configured, and choose Supply air if the cold aisle T/H sensors are not configured.  When the application scenario is non-aisle containment, you are advised to choose Return air, and choose Cold aisle if the cold aisle T/H sensors are configured.  Hot aisle is not recommended. Temperature control mode This parameter controls the temperature inside the room or aisles based on the Average value, Max value, or Min value of the temperatures collected by each sensor.  Average value: Select Average value if the temperature is to be controlled based on the averaged data value collected by the collector.  Max value: Select Max value if the temperature is to be controlled based on the maximum data value collected by the collector.  Min value: Select Min value if

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 73 Parameter Description Configuration Principle the temperature is to be controlled based on the minimum data value collected by the collector. Control point temperature setpoint After the Temperature and humidity control type and the temperature value under this type are set, the device conducts cooling or heating based on the settings. Set this parameter as required.  Return air temperature: 26–35°C recommended  Supply air temperature: 18–24°C recommended  Cold aisle temperature: 18–24°C recommended  Hot aisle temperature: 26–35°C recommended Control point humidity setpoint After the Temperature and humidity control type and the humidity value under this type are set, the device conducts humidifying or dehumidifying based on the settings. Set this parameter as required.40%–60% RH recommended Step 4 Go back to home screen, and tap Running > Device Details > T/H sensor to check that the cold aisle temperature and humidity are displayed and the values are reasonable.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 74 Figure 4-5 Cold aisle temperature and humidity ----End 4.3.2 (Optional) Setting the Pressure Difference Control Prerequisites If the differential pressure sensor is installed, perform the following operations accordingly. If the differential pressure sensor is not installed, skip this part. Procedure Step 1 On the home screen, choose Settings > System Settings > Indoor fan, set Air-side difference pressure sensor type to 0~50 Pa. Step 2 Set Indoor fan control type to Pressure diff ctrl. Step 3 Change the other parameters based on the following instructions. Table 4-5 Parameter description Parameter Description Configuration Principle Indoor fan control type Sets the control type for the indoor fan. Normally, retain R/S air temp diff rate ctrl. If the differential pressure sensors

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 75 Parameter Description Configuration Principle are configured, change to Pressure diff ctrl. Indoor fan pressure difference setpoint Sets the value for the pressure difference control. The default value is 10 Pa. Air-side difference pressure sensor type Sets the measuring range for the air side differential pressure sensor. There is no default value. Set it to 0–50 Pa. Min indoor fan speed Sets the minimum speed for the indoor fan. You are advised not to change the value. Max indoor fan speed Sets the maximum speed for the indoor fan. You are advised not to change the value. ----End 4.3.3 Setting Teamwork Control Parameters Prerequisites Assign teamwork group number and teamwork unit address for the teamwork controlled smart cooling products as follows:  Teamwork group no.: Group the smart cooling products in adjacent areas as one, that is, assign one teamwork group number for them. At most four teamwork groups can be assigned (1–4).  Teamwork unit address: The address for the smart cooling product in the same group cannot be the same (address range: 1–32). The smart cooling product with minimum address is the master one that collects, processes, and delivers data. Context The parameters in this section are for reference only. Set actually parameter values as required. Procedure Step 1 On the home screen, tap > Teamwork Settings, to enter Teamwork Settings page, as shown in Figure 4-6.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 76 Figure 4-6 Teamwork settings Step 2 Set teamwork control parameters. All teamwork control parameters can be set on the master smart cooling product. Only Teamwork group No., Air conditioner address, Enable teamwork CAN resistor, Teamwork function and Networking mode can be set on slave smart cooling products. Other parameters of the slave units will be modified by the master unit synchronously. Table 4-6 describes how to set the parameters. Table 4-6 Teamwork settings Parameter Description Configuration Principle Default Value Teamwork group No. Set the assigned teamwork control number. The number of the teamwork controlled group, which is the same for all the devices in the group. 1 Air conditioner address Set the assigned smart cooling product address. Smart cooling product addresses should be different from each other. NA Enable Teamwork CAN resistor Indicates the build-out resistor status of each smart cooling product in a teamwork group. Set the parameter if CAN network is used.  Set this parameter to No for non-teamwork scenarios.  For teamwork scenarios, set this parameter to Yes for the first and last smart cooling products in a teamwork group, and set it to No for other smart cooling products. No Teamwork function Disable or enable the teamwork function. If the teamwork function is Set this parameter based on the onsite device heat Disable

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 77 Parameter Description Configuration Principle Default Value disabled, this device is operating according to its own control. If the teamwork function is enabled, this device works in harmony with others that in the same group. distribution. Networking mode Networking mode for the teamwork. The networking mode set on the screen must be consistent with the actual networking mode. Otherwise, the teamwork control function will be unavailable. If the networking mode changes, select the corresponding networking mode on the screen. If the networking mode is changed on the screen, the software will restart and then run in the new networking mode. (For V200R002 version, the software will not restart when the networking mode is changed ) Networked over CAN or MAC_CAN. CAN network indicates teamwork control over a CAN bus, MAC_CAN network teamwork control over an FE port. MAC_CAN network Number of smart cooling products in this group Number of the smart cooling products in this group (1 to 32 can be set). Total number of the smart cooling products in this group. 3 Number of running smart cooling products in this group Number of active units in a group. The value ranges from 1 to Number of smart cooling products in this group. The host allocates running units by smart cooling product unit address in ascending order, which is from 1 to 32. The rest will become the standby ones. 2 Rotation function Disable or enable the active and standby smart cooling products to change identity after a certain time, maximizing their service life. This function is recommended when the heat is even. Disable Rotation Rotation days (1–30). 7 by default 7 day (s)

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 78 Parameter Description Configuration Principle Default Value period Rotation time 24 hours in a day (0–23). 0 by default 0 Forced rotation Forced rotation specifies whether to enable a forcible rotation on the group before the specified rotation time. After a forced rotation, the accumulated time is recalculated. This item is set to No by default. If forced rotation is required, the function is set to Yes. No Requirement control Enable or disable the requirement control for the master device.  When the requirement control is Disable, the master device does not synchronize data to the slave device, and all the smart cooling products operate based on their own requirements, not referring to the mode delivered by the master device.  When the requirement control is Anti-competitive running, the master device synchronizes data (the temperature and humidity control type and set points of the master device and other parameters) to the slave device, and all the smart cooling products in the group refer to the mode delivered by the master device.  When the requirement control is Indoor fan unified control, all smart cooling product fans in the group rotate at the same speed. Anti-competitive running is recommended for the following scenario: In one teamwork, the temperature and humidity control type and temperature and humidity set point of units are the same, and device heat loads are distributed evenly. Disable

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 79 Parameter Description Configuration Principle Default Value Cascade function After the requirement control is enabled, you can configure Cascade function. The cascade function starts standby smart cooling products if the active one cannot meet the refrigerating requirements. If the heat load to the device increases, the cascade function is recommended. Disable Step 3 Complete the teamwork settings for all the smart cooling products by performing Step 1 and Step 2. Step 4 On the home screen of any teamwork controlled smart cooling product, tap . If the teamwork control succeeds, the teamwork topology of the smart cooling product in the group is displayed, as shown in Figure 4-7. Table 4-7 describes the note for the screen. Figure 4-7 Teamwork topology Table 4-7 Notes for the screen No. Parameters Note 1 On/Off On indicates that the smart cooling product is started and Off indicates that the smart cooling product is shut down. 2 01, 02, 03 Indicates the smart cooling product address. 01 is the master one and the rest are all slave ones. NOTE If the master one offline, the teamwork networking failed. 3 Active/Stand Active: properly responds to the requirement control.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 80 No. Parameters Note by Standby: responds to the requirement control when active one is faulty (critical alarms, shutdown, and offline) or cannot meet cooling requirements. 4 M/S M indicates the master unit, and S indicates a slave unit. Blue indicates that the device is operating, and gray indicates that the device is idle. 5 Frame: green/non-gr een A device with green frame indicates the device itself, as shown in . A non-green frame indicates the other device in the group, as shown in . 6 Ground color: red, bright gray Red indicates that a critical alarm is generated, as shown in . Bright gray indicates that the device is operating without any critical alarms, as shown in . If teamwork succeeds, the teamwork icon is green. If teamwork fails, the teamwork icon is red. If teamwork mode is disabled, the teamwork icon is gray. ----End Follow-up Procedure After you have completed the settings, perform the following checks to confirm whether the teamwork control is available: 1. Check whether the device number on the topology is the same as the actual device number. − If yes, go to 2.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 81 − If no, check the cable connection and the settings of teamwork control parameters. 2. Check whether the number of active devices on the topology is the same as the actual device number. − If yes, go to 3. − If no, check the cable connection and the settings of teamwork control parameters. 3. Check whether the number of standby devices on the topology is the same as the actual device number. − If yes, go to 4. − If no, check the cable connection and the settings of teamwork control parameters. 4. Check whether the number of online devices on the topology is the same as the actual device number. − If yes, the check is complete. − If no, check the cable connection and the settings of teamwork control parameters. 4.3.4 Setting Communications Parameters 4.3.4.1 Setting Communications Parameters (Modbus RTU Protocol) Context To set communications parameters, log in as the admin user. Procedure Step 1 On the home screen, choose Settings > Comm Settings > Modbus Settings. Step 2 Set baud rate and communication address by following instructions in Table 4-8. Table 4-8 Baud rate and communication address settings Parameter Setting Setting Method Baud rate 9600, 19200 Set the baud rate as required. The value should be consistent with that set on the EMS. Communicat ion address 1–255 Set the communication address of the smart cooling product as planned. The EMS communicates with the smart cooling product through this address, and the communication addresses of two smart cooling products connecting to the same EMS must be unique. ----End 4.3.4.2 Setting Communications Parameters (Modbus TCP Protocol) Context  To set communications parameters, log in as the admin user.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 82  If Link mode is Server, a smart cooling product can be accessed by element management system (EMS) client. If Link mode is Client, a smart cooling product can be connected only to the EMS with the corresponding IP address. If Link mode is Server and client, a smart cooling product can be accessed by EMS client and connect to the EMS with the corresponding IP address at the same time. Procedure Step 1 On the home screen, choose Settings > Comm Settings > IP Settings. Step 2 Set the parameters by referring to Table 4-9. Table 4-9 IP parameter settings Parameter Setting Method IP assigning mode Set according to the actual plan. IP address Set according to the actual plan. Subnet mask Set according to the actual plan. Gateway Set according to the actual plan. Step 3 Tap Submit. Step 4 On the home screen, choose Settings > Comm Settings > Modbus Settings. Step 5 Set parameters for Modbus TCP by following instructions. Table 4-10 Modbus TCP parameter settings Parameter Setting Setting Method Link mode Server, Client, Server and client  If you set Link mode to Server, the smart cooling product, as a server, supports two client connection and establishes communication.  If you set Link mode to Client, the smart cooling product, as a client, can connect to a remote server and establish communication.  If you set Link mode to Server and client, the smart cooling product, as a server, supports two client connection and establishes communication. In addition, the smart cooling product, as a client, can connect to a remote server and establish communication. Client encryption Enable, Disable This parameter is configurable when Link mode is set to Client. Server encryption Enable, Disable This parameter is configurable when Link mode is set to Server. NMS IP N/A Enter the actual IP address of the EMS. IP addresses of

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 83 Parameter Setting Setting Method address the display panel, EMS client, and EMS server must be unique. This parameter is configurable when Link mode is set to Client. NMS port number N/A It is recommended that you retain the default value. If you need to change the value, enter a value as required. This parameter is configurable when Link mode is set to Client. ----End 4.3.4.3 Setting Communications Parameters (SNMP Protocol) Context  To set communications parameters, log in as the admin user.  This section is suitable only for SNMP. Skip this section if you use Modbus.  Record the values entered in this section. They will be used when you access a smart cooling product to an EMS (element management system).  One smart cooling product supports concurrent access of up to 6 EMSs through SNMP. Procedure Step 1 On the home screen, choose Settings > Comm Settings > SNMP Settings. Figure 4-8 is displayed. Figure 4-8 Setting SNMP communications parameters Step 2 Set SNMP Version based on site requirements, and then tap Submit.  If you set SNMP Version to ALL or SNMPv1&v2c, you can set Read Community and Write Community by performing Step 3.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 84  If you set SNMP Version to ALL or SNMPv3, you can add SNMPv3 users by performing Step 4. Step 3 Set Read Community and Write Community. 1. Tap the text box after Read Community, as shown in Figure 4-9. Set Read Community as planned, tap , and then tap Submit. Figure 4-9 Setting read community 2. Tap the text box after Write Community, as shown in Figure 4-10. Set Write Community as planned, tap and then tap Submit. Figure 4-10 Setting write community Step 4 Add an SNMPv3 user. 1. Tap Add under SNMP V3. 2. Enter a planned value for User Name, select values for Auth Protocol and Prop Protocol from drop-down list boxes, and tap , as shown in Figure 4-11.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 85 MD5 and DES protocols are not secure. It is recommended that you set Auth Protocol to SHA, and set Prop Protocol to AES. The following operations use the recommended settings as an example. Figure 4-11 Setting the protocol type Passwords of an authentication protocol and proprietary protocol must comply with the following policies:  The password must consist of 8–15 characters and contain at least two types of characters among uppercase letters (A–Z), lowercase letters (a–z), and digits (0–9).  A password must be different from the corresponding user name or inverted user name.  A password must not be a string containing duplicate sections, such as 12a12a12a. 3. Set SHA Password and Confirm Password as planned, and tap , as shown in Figure 4-12.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 86 Figure 4-12 Setting an SHA password 4. Set AES Password and Confirm Password as planned, and tap , as shown in Figure 4-13. Figure 4-13 Setting an AES password 5. Tap Submit. Step 5 Tap the text box after SNMP Port, as shown in Figure 4-14. Set SNMP Port to the actual port number, tap , and then tap Submit.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 87 Figure 4-14 Setting SNMP port SNMP Port is set to 161 by default. Step 6 Tap Next Page. Step 7 Set SNMP trap parameters. 1. Tap Add under SNMP Trap. 2. Set Trap Address as planned and Trap Port to the actual port number. Trap Port is set to null by default. 3. Select the SNMP Version. If an SNMPv3 user is configured, it is recommended that SNMP Version be set to SNMPv3. 4. If SNMP Version is set to SNMPv3, select an SNMPv3 user name, and then tap as shown in Figure 4-15. Figure 4-15 Setting SNMP trap parameters 5. Tap Submit under SNMP Trap. ----End

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 88 Follow-up Procedure After a USB flash drive has been inserted into the controller USB port and successfully identified, tap Export File under MIB File to export the MIB file to the USB flash drive for the customer's use in accessing a third-party EMS. Figure 4-16 shows successful file export. Before using a USB flash drive, ensure that its data has been scanned by antivirus software and is secure. Figure 4-16 Exporting the MIB file successfully 4.3.5 (Optional) Setting WIFI Parameters Prerequisites After connecting the WIFI module of the USB interface to the USB port of the smart cooling product display, WIFI Settings is enabled to be set. Procedure Step 1 On the home screen, choose Settings > Comm Settings > WIFI Settings. Step 2 Set the parameters by referring to Table 4-11. Table 4-11 WiFi settings Parameter Setting Method WiFi SSID Set WiFi SSID based on the actual configuration; WiFi SSID is the name used for the WiFi hotspot over which a mobile phone can connect to the smart cooling product. WiFi Password Enter the WiFi password when you use a mobile phone to connect to the WiFi. When you enable the WiFi function for the first time,

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 89 Parameter Setting Method you need to set a password (the WiFi has no preset password). Enable WiFi Enable the WiFi function. The default status is Disable. Step 3 Tap Submit. ----End 4.4 Startup Download the Service Expert app from Huawei app store and runs on Android. Apply for permission after downloading the app. Step 1 Tap Start on the home screen of the ACC.  If the screen shown in Figure 4-17 is displayed, indicating initial startup, perform Step 2 for initial startup verification. Figure 4-17 Initial startup

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 90 Figure 4-18 Password screen If the software version is after V200R002C00SPC050, a QR code will generate in the Start Password page, used for inputing the barcode and verify code when offline boot is used.  If the screen shown in Figure 4-19 is displayed, tap Confirm to start the smart cooling product. Figure 4-19 Startup Step 2 Select Offline Boot or Online Boot as required on the Service Expert app for initial startup verification. The Service Expert app can be downloaded from Huawei app store and runs on Android. User interfaces displayed in this document correspond to the APP software version V100R001C00B043T007 and are for reference only.  For offline boot, enter the barcode and the verification code on the mobile phone app. The app automatically generates a startup password for the smart cooling product. Then enter the password on the home screen of the ACC to start the smart cooling product.  For online boot, activate the startup password on the mobile phone app to start the smart cooling product. If the initial startup verification is passed, startup verification is not required afterwards. After factory settings are restored, re-verification for startup is required. ----End

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 91 Offline Boot Step 1 Open the Service Expert app. Step 2 Tap StartUp on the home screen of the app and the screen shown in Figure 4-20 is displayed. Figure 4-20 Offline boot Step 3 Tap Offline Activation and the screen shown in Figure 4-21 is displayed. Figure 4-21 Generating a startup password If the software version is after V200R002C00SPC050, an icon will generate in the right of BarCode. After clicking it and scanning the QR code generated in the Start Password page, the barcode and verify code can be automatically entered into the APP.

Cooling Product User Manual 4 Commissioning Issue 07 (2020-03-16) Copyright © Huawei Technologies Co., Ltd. 92 Step 4 On the Offline Activation screen, enter Bar code and Verification code, which are available on the home screen. Tap Generate PWD to generate a startup password. If startup verification fails (when you do not enter the password within 5 min or the password you enter is incorrect), the generated password will be invalid for the sake of security. The initial startup verification fails, you need to generate a new startup password. Step 5 Tap Password on the home screen of the ACC and enter the generated startup password in the displayed dialog box. ----End Online Boot Step 1 Insert the WiFi module to the USB port on the ACC. Step 2 Choose Settings > Comm Settings > WIFI Settings on the home screen of the ACC. Then set WiFi parameters and enable the WiFi function. Step 3 Connect the mobile phone to the smart cooling product WiFi and ensure proper communications between the mobile phone app and the smart cooling product. Step 4 Open the Service Expert app. Step 5 Tap StartUp on the home screen of the app and the screen shown in Figure 4-22 is displayed. Figure 4-22 Login screen  The preset user name is admin, and the preset password is Changeme.  If you change the login password on the smart cooling product LCD, the password for logging in to the Service Export app will be changed to what you set on the LCD.