AMC 1ACO Instructions Manual

INSTRUCTIONS Installation and Operation of the Gas Monitor 1ACO One-Channel Monitor IMPORTANT: Please read these installation and operating instructions completely and carefully before starting. Filename: 3221405A.doc Copyright © July 2009, AMC The Armstrong Monitoring Corporation 215 Colonnade Road South, Ottawa, Ontario, Canada K2E 7K3 Tel: (613) 225-9531 • Fax: (613) 225-6965 • Canada & U.S. Toll Free: 1-800-465-5777 E-mail: [email protected] • Internet: www.armstrongmonitoring.com

1 TABLE OF CONTENTS Section Title Page 1 WARRANTY..........................................................................................................................3 1.1 LIABILITY .......................................................................................................................3 1.2 PRODUCT RETURN......................................................................................................3 1.3 MODIFICATIONS AND SUBSTITUTIONS.....................................................................3 2 PRODUCT INFORMATION...................................................................................................4 3 PRODUCT DESCRIPTION ...................................................................................................5 3.1 GENERAL DESCRIPTION.............................................................................................5 3.1.1 MONITOR FEATURES ...........................................................................................5 4 INSTALLATION ....................................................................................................................8 4.1 MOUNTING INSTRUCTIONS ........................................................................................8 4.2 WIRING ..........................................................................................................................9 4.2.1 MONITOR WIRING .................................................................................................9 4.2.2 AMC-S2e Connection............................................................................................10 4.3 DIP SWITCH PROGRAMMING ...................................................................................11 4.4 ALARM RELAY PROGRAMMING ...............................................................................13 4.5 AUDIO ALARMS ..........................................................................................................13 5 OPERATION AND CALIBRATION.....................................................................................14 5.1 POWER-ON DELAY.....................................................................................................14 5.2 TEST SWITCH FUNCTION..........................................................................................14 5.3 ACKNOWLEDGE FUNCTION......................................................................................14 5.4 ALARM/WARNING RELAY ACTIVATION DELAYS ....................................................14 5.5 RELAY OUTPUTS........................................................................................................14 5.6 CALIBRATION/SERVICE.............................................................................................15 5.6.1 Equipment Required..............................................................................................16 5.6.2 Calibration .............................................................................................................16 6 PREVENTIVE MAINTENANCE ..........................................................................................19 6.1 GENERAL ....................................................................................................................19 6.2 SCHEDULED CALIBRATION ......................................................................................19 6.3 SENSOR REPLACEMENT ..........................................................................................19 7 INSTALLATION TIPS AND TRICKS ..................................................................................20

3 1 WARRANTY The AMC-1ACO one-channel monitor is warranted against defects in material and workmanship for a period of two (2) years from date of shipment (except electrochemical sensor elements, catalytic elements and portable monitors – one (1) year – refer to individual spec sheets for additional exceptions). Calibration is not warranted. During the warranty period, Armstrong will repair or replace components that prove to be defective in the opinion of Armstrong Monitoring. The corporation is not liable for auxiliary interfaced equipment, nor consequential damage. NOTE: Any substitution or tampering with components without expressed, written permission of ARMSTRONG MONITORING may result in intrinsic damage which will cancel the effectiveness of the warranty. Extended warranties are available through the factory. Please contact factory. Service agreements may supersede standard warranty terms. 1.1 LIABILITY All Armstrong Monitoring systems shall be installed by a qualified technician and maintained according to Armstrong Monitoring Installation and Maintenance Manual instructions. Armstrong Monitoring shall not be responsible for any liability arising from auxiliary interfaced equipment, consequential damage, the installation, or the operation of this equipment. Armstrong’s total liability is contained in the warranty conditions stipulated above. No other acceptance of liability is expressed or implied by Armstrong Monitoring. Except as set forth herein, Armstrong Monitoring makes no warranty, expressed or implied, with respect to the fitness for any particular purpose or use or otherwise of the products or services, or on any parts or components or labour furnished as part of the sale. In no event shall Armstrong Monitoring, its officers, directors, employees, agents or servants be liable to the buyer or any other party for any loss of profit, loss of use, incidental, consequential or special damages arising out of the sale, delivery, servicing, use, loss of use, of the products or of any part thereof, irrespective of whether Armstrong Monitoring or any of its officers, directors, employees, agents or servants has advanced notice of the possibility of such damages. In no event will the total liability to the buyer exceed the sum paid to Armstrong Monitoring by buyer for the products and services. 1.2 PRODUCT RETURN All products that must be returned for warranty service will be shipped by prepaid freight and will only be accepted with a Returned Materials Authorization (RMA) number issued by ARMSTRONG MONITORING. Goods returned to the client will be by freight collect. 1.3 MODIFICATIONS AND SUBSTITUTIONS Due to an ongoing development program, Armstrong Monitoring reserves the right to modify the design and substitute components in any of its products without prior notice. All changes are at the sole discretion of Armstrong Monitoring, and the corporation shall not be liable for any cost arising out of such modifications or substitutions that may be incurred by the user.

4 2 PRODUCT INFORMATION Monitor Serial Number. ………………..……………….. AMC-S2e Serial Number………………………………… Alarm Trip Points…………………………………………. Warning _______________________ Alarm________ _________________ Full Scale Concentration………………………………… Power Supply Requirement. ………………….……..… 120 VAC, 60 Hz, 30 VA Operating Temperature.…….………………….……..… -20°C to +40°C (-4°F to +104°F) Operating Pressure..…………….…………….……..….. Ambient atmospheric pressure Relative Humidity..…………….…………….……..…….. 35 – 85% non-condensing. TORQUE SPECIFICATIONS: POWER SUPPLY: Neutral terminal screw ……………………………………………………………… 7 pound-inches. Hot terminal screw …………………………………………………………...……... 7 pound-inches. Ground Lug screw. …………………………………………………………………. 15 pound-inches. RELAY: Relay socket terminal screws ……………………………………………………… 7 pound-inches. Note: All Armstrong Monitoring systems must be installed and maintained according to instructions, to ensure proper operation. Only qualified technicians should install and maintain the equipment.

5 3 PRODUCT DESCRIPTION 3.1 GENERAL DESCRIPTION The Gas Monitor 1ACO monitor is a one channel gas monitoring system incorporating state of the art sensing technology using micro-controller based design to provide continuous, reliable surveillance of surrounding air for traces of hazardous gases (listed in Section 2). The monitor comes with the following features, see Figures 1 and 2. 3.1.1 MONITOR FEATURES 1. RUN/FAULT/OFF INDICATOR: A green LED RUN: LED on FAULT: LED flashing OFF: LED off 2. WARNING INDICATOR: Warning levels of gas are indicated by a yellow LED. Warning concentrations are indicated in Section 2 3. ALARM INDICATOR: Alarm levels of gas are indicated by a red LED. Alarm concentrations are indicated in Section 2 4. POWER TERMINAL BLOCK: For line voltage connections of 120 VAC, 60 Hz 5. TRANSFORMER: A Class II, step down transformer powers the internal circuitry and remote sensor at low voltages. Located underneath the PCB 6. INTERNAL WIRING HEADER: Provides wiring connection points as follows: 1,2,3 - Relay coils 4,5,6,7,8 - Reserved 9,10 - Acknowledge switch 11,12 - Audio alarm indicator 7. AUDIO ALARM INDICATOR: The buzzer will activate for Alarm, Warning (configurable) and fault conditions, with a distinct tone for each one 8. RELAY SETUP JUMPERS: Used to independently configure the Warning and Alarm relays as Normally Energized or Non-Energized 9. TEST SWITCH: The test switch is provided to electronically simulate alarms in order to test audio and relay functions 10. TRIP POINT ADJUSTMENT: Sets the Signal adjust, Alarm and Warning

6 11. PROGRAMMING DIP SWITCHES: Allows user to configure the alarm delay and timer circuits, audio alarm activation, sensor mode selection, fault threshold, and acknowledge switch function 12. RELAYS: 2 alarm DPDT relays are provided 13. ON-BOARD AMC-S2e SENSOR: Sensor allows local detection of gas FIGURE 1: Gas Monitor 1ACO, Front Cover.

7 9. TEST SWITCH 10. TRIP POINT ADJUSTMENT 7. AUDIO ALARM INDICATOR 5. TRANSFORMER (UNDER PCB) 11. PROGRAMMING DIP SWITCHES 8. RELAY SETUP JUMPERS 6. INTERNAL WIRING HEADER 4. POWER TERMINAL 13. ON-BOARD AMC-S2e SENSOR 12. RELAYS BLOCK FIGURE 2: Internal Features of the Gas Monitor 1ACO.

8 4 INSTALLATION Follow the guidelines in this section for proper locations and installation of the Gas Monitor 1ACO. In addition to these instructions, ensure installation is compliant with local building and electrical codes. This section covers topics related to installation location, mounting, cable selection, wiring instructions and monitor function programming for the Gas Monitor 1ACO. 4.1 MOUNTING INSTRUCTIONS Securely fasten the Gas Monitor 1ACO unit on a solid, non-vibrating surface or structure. Install the unit where it is not exposed to rain or water spray. Install in an area where the local concentration of gas is unaffected by the presence of ventilation systems and away from sources of interference gases. Mount the monitor where the unit can be observed periodically. For most applications the monitor should be mounted 1.2 -1.8 m (4-6 ft) from the floor. See Figure 3 for mounting hole locations. CAUTION: All cable entry MUST BE through the BOTTOM of the monitor enclosure only. Other entry locations will allow foreign materials to enter the enclosure, causing possible damage to the internal components. FIGURE 3: Locations of Mounting Holes.

9 4.2 WIRING 4.2.1 MONITOR WIRING POWER SUPPLY: The monitor operates on 120 VAC, 60 Hz. A Class II step down transformer runs the internal circuitry at low voltages. The power supply connections are made at the power terminal block located inside the monitor, see Figure 4. RELAYS: Relays are included with the monitor, DPDT relays are used. The two relays are set for different alarm conditions. The contacts are rated for 10Amps@250VAC resistive. For relay contact arrangement, see Figure 5. The Gas Monitor 1ACO is shipped factory configured to be de-energized in the non-alarm state. If the user prefers to have relays in a normally energized (failsafe) state see section 4.4 for jumper configuration. AC PRIMARY 120 VAC, 60 Hz NEUT. HOT GND FIGURE 4: Location of Power Supply Connections.

10 FIGURE 5: Relay Contact Arrangement. 4.2.2 AMC-S2e Connection The AMC-S2e sensor is designed to plug into the same socket as the solid state sensor. Plug the sensor into the socket and ensure the green LED on the AMC-S2e illuminates. If the green LED does not illuminate, unplug and rotate AMC-S2e 180º. FIGURE 6: S2e sensor connection. Insure that JB8 jumper is in the MD-V setting. Refer to Figure 7 for more information.

11 JB8 JB10 MD-V SS 4-20mA V+ +5V SENSOR 1 JB8 JB10 SS = MD-V = 4-20mA = V+ = +5V = FIGURE 7: Signal input configuration jumpers. 4.3 DIP SWITCH PROGRAMMING The circuit board has two blocks of DlP-switches for configuring the various functions; see Figure 2, item 11. Each DIP-switch can be set to OFF (left position) or ON (right position) depending on functions required. Table 1: DIP-switch programming chart Switch Feature Position Description OFF Warning and alarm relays are automatically de-activated once activating condition has been removed and minimum run timer has expired. SW1-1 Activate Alarms until Acknowledge (Latching Relays) ON Once activated, warning and alarm relays remain activated (latched) until activation condition has been removed, minimum run timer has expired and the Acknowledge button has been pressed.

12 Switch Feature Position Description SW1-2, SW2-2 Minimum Run Timer See Description Warning and alarm relays are maintained in alarm state for a minimum time interval following alarm activation, as follows: SW1-2 SW2-2 Minimum Run Time OFF OFF 0 minutes ON OFF 5 minutes OFF ON 10 minutes ON ON 30 minutes Note that a sensor level falling below the alarm threshold and then re-occurring during this time resets the alarm timer for the associated alarm. SW1-3, SW1-4 Sensor Type (Mode Select) See Description Sensor type (threshold mode) is selected as follows: SW1-3 SW1-4 Sensor Type (Mode) OFF OFF Increasing ON OFF Decreasing OFF ON Reserved ON ON Reserved OFF The Alarm relay is not activated when fault is detected. SW2-1 Alarm Relay Activated when Fault is Detected ON When fault is detected, the Alarm relay is activated. OFF Audio alarm is disabled for Warning conditions. SW2-3 Audio Enable for Warning ON Audio alarm is activated in conjunction with Warning. OFF Sensor Fault thresholds set at 0.4 mA into 250R or 100 mV. SW2-4 Sensor Fault Threshold ON Sensor Fault thresholds set at 1.4 mA into 250R or 350mV. OFF No activation delay of Warning conditions. SW2-5 Activation Delay, Warning ON Five minute delay on activation of Warning conditions following sensor exceeding alarm threshold. OFF No activation delay of Alarm conditions. SW2-6 Activation Delay, Alarm ON Delay on activation of Alarm conditions following sensor exceeding alarm threshold. OFF Audio alarm (buzzer) disabled. SW2-7 Audio Alarm Enable ON Audio alarm (buzzer) enabled.

13 4.4 ALARM RELAY PROGRAMMING The WARNING and ALARM relays may be configured as normally energized or normally de- energized with the jumper straps identified in Table 2 WARNING and ALARM Relay Active State and shown in Figure 2, item 8. Typically the “normally de-energized” position is employed, activating the relay when an alarm condition is detected. The “normally energized” position is selected when failsafe operation is required. For example, the requirement is that when power to the Gas Monitor is lost, the load connects to a power source via contacts of this, normally energized relay. Table 2: WARNING and ALARM Relay Active State Relay Jumper Normally De-Energized Normally Energized Warning JB11 1-2 2-3 Alarm JB12 1-2 2-3 4.5 AUDIO ALARMS An audio alarm output is provided, which produces various alarm sounds, as shown in the chart below. The audio alarm can be disabled by turning OFF the DIP-switch SW2-7. Table 3: Audio alarm operation Sensor Status Output Normal off Warning (SW2-3 OFF) off Warning (SW2-3 ON) two long, slow beeps. followed by short pause Alarm four fast beeps, followed by short pause Any Sensor Fault short, slow beeps Notes: 1) Micro-controller operation ensures that Warning, Alarm and Fault conditions will not occur simultaneously on the same sensor.

14 5 OPERATION AND CALIBRATION This section covers the operation and calibration procedures pertaining to the Gas Monitor 1ACO. 5.1 POWER-ON DELAY Following successful completion of all self-tests, detection of sensor WARNING, ALARM and FAULT conditions is disabled for 30 seconds. This delay is provided to allow the sensors to stabilize. During this delay, the status LEDs show the “sensor normal” condition (only the green LED on). The audio alarm is silent, and the alarm relay outputs are held in the non-alarm condition. 5.2 TEST SWITCH FUNCTION While pressed, the on-board test switch will cause continuous activation of the alarm relay outputs (energized or de-energized, depending on configuration), continuous activation of the audio alarm, and all status LEDs will be illuminated. Sensor processing and updating of internal status and timers continues. When released, the outputs and LEDs return to normal operation. 5.3 ACKNOWLEDGE FUNCTION An option exists for an Acknowledge pushbutton switch. When pressed, any present WARNING, ALARM or FAULT condition, including those previously acknowledged, will be silenced (audio alarm off) for 30 minutes. If any WARNING, ALARM or FAULT condition remains after 30 minutes, the audio alarm will again be activated. Any WARNING, ALARM or FAULT condition returning to normal and then reactivating, or any new WARNING, ALARM or FAULT condition will cause an immediate audio alarm. If the Activate Alarms Until Acknowledge (latching relays) (SW1-1 ON) feature is enabled, the alarm outputs will not automatically return to normal, but will remain in alarm until the acknowledge button has been pressed. While a relay remains latched, the audio alarm remains active. 5.4 ALARM/WARNING RELAY ACTIVATION DELAYS The Gas Monitor 1ACO comes standard with 5 min activation time delays for the WARNING and ALARM relay contacts. The activation time delays can help prevent short cycling WARNING/ALARM in some applications. The delays can be enabled by turning ON switches SW2-5 and SW2-6, for WARNING/ALARM respectively. 5.5 RELAY OUTPUTS A WARNING condition on either sensor will result in activation of the WARNING relay output. An ALARM condition on either sensor will result in activation of both the WARNING and ALARM relay outputs.

15 Each alarm relay (WARNING, ALARM) may be selected as either energized when alarm active, or de-energized when alarm active, using on-board jumpers JB11, JB12, respectively. This option is provided to allow configuration flexibility. If configured to energize the relay when alarm becomes active (jumpers set to “normally de-energized”), a controller failure or controller power failure will prevent an alarm condition from being produced. The opposite setting of jumpers (relay “normally energized”) will result in an alarm condition produced on reaching the gas threshold level, controller failure or controller power failure. 5.6 CALIBRATION/SERVICE The Gas Monitor 1ACO and AMC S2e (CO) comes factory calibrated and does not need to be adjusted as part of installation and should be ready for operation after installation and a 30 minute stabilization time. Subsequent calibration is required as a part of regular maintenance, and when replacing the sensor. See section 6 Preventive Maintenance of this manual for the recommended calibration schedule. Caution: - Only qualified personnel should perform the actual calibration. - Users new to gas calibration are advised to consult with Armstrong Monitoring The Armstrong Monitoring Corporation offers the following plans: 1. Factory pre-calibrated replacement sensor/transmitter units 2. On site installation and calibration by Armstrong Monitoring 3. On site calibration by Armstrong Monitoring 4. Training by Armstrong Monitoring Direct service enquiries to The Armstrong Monitoring Corp at (800)465-5777 or [email protected]. The monitor should not need re-calibration when first installed and powered up, but a test for correct operation is recommended after a stabilization period. The table and figure below are provided to identify key components used in calibration. • RV4 is used to condition the signal from the sensor so that it is in a usable range. TP4 is used to monitor the signal from the sensor. • RV5 is used to set a threshold at which the WARNING is triggered. TP5 is used to monitor these WARNING levels. • RV6 is used to set a threshold at which the ALARM is triggered. TP6 is used to monitor these ALARM levels.

16 Table 6: Test points and trimpots allocation Reference Points Sensor Signal TP4 WARNING TP5 ALARM TP6 Test Points Ground TP7 WARNING RV5 ALARM RV6 Trimpots Span R1 TB1 TP7 RV6 R1 RV5 TP4 TP5 TP6 JB8 JB10 1 FIGURE 8: Gas Monitor 1ACO Test Points and Trimpots. The AMC-S2e supplies a linear 1.0 to 3.3V DC signal to the monitor. This translates to a 0.4 to 1.32 volt DC signal at TP4. The alarms are set to correspond to some fraction of the transmitters full scale calibration. The WARNING threshold is set using trimpot RV5. The ALARM threshold is set using trimpot RV6. 5.6.1 Equipment Required • Digital multimeter with a minimum display range of 0 to 10.0 VDC. • Miniature screwdriver trimmer adjustment tool. • Zero & Span gases (contact AMC for information) 5.6.2 Calibration The AMC-S2e is delivered already calibrated from the factory. When the AMC-S2e-CO is calibrated, it will have a 3.3V at TB1 (or 1.32V at TP4) output in the presence of 100 PPM CO gas. The zero gas output of the AMC-S2e varies from unit to unit. This calibration procedure

17 calibrates the sensor and allows alarm thresholds to be set between no gas and full range gas levels. Connect the negative lead of the multimeter to TP7 AGND 1) Obtain access to AMC-S2e (CO). Remove cover of 1ACO so gas can be applied directly to the sensor and signal pot can be adjusted. 2) Attach multi-meter to measure the output signal; positive lead to TP4 and negative lead to TP7 AGND 3) Apply the span gas sample (100ppm CO) with the calibration adapter cup firmly and completely over the sensor for 2 minutes with flow rate 0.5 liters per minute. At 2 min adjust the span trimpot R1 (refer to Figure 9) on the AMC-S2e(CO) for output signal reading 3.3VDC +/- 2% (66mV) 4) In the presence of clean air (0 PPM CO), measure the output signal at TP4. Record this value as VLOW. Use the following formula to determine what the output voltage of the AMC-S2e(CO) will be for the gas concentration at which the alarm is to be triggered. VALARM = ((CALARM/ Cfull scale)*(1.32V - VLOW)) + VLOW Where o VALARM is the voltage the alarm trip point will be set to. o CALARM is the gas concentration at which the alarm is to be triggered. o Cfull scale is 100 PPM for the AMC-S2e-CO. o 1.32V is level the AMC-S2e has been factory calibrated to for 100 PPM CO. o VLOW is the voltage measured in the previous step, representing the zero gas output level Adjust to appropriate alarm trimpot for the desired threshold. • For increasing thresholds, the ALARM threshold must be higher than the WARNING threshold. EXAMPLE 1: To set an ALARM threshold of 50 PPM with the AMC-S2e; • Install AMC-S2e, wait the stabilization period and measure the output signal at TP4 and record as VLOW (use 0.380V for this example). • Calarm: 50 PPM • Cfull scale: 100 PPM (AMC-S2e is calibrated to this value at the factory) • Valarm = (( 50 PPM / 100 PPM) * (1.320V – 0.380V)) + 0.380V = 0.850V RV6 would be adjusted so that 0.850V is measured at TP6. EXAMPLE 2: To set a WARNING threshold of 25 PPM with the AMC-S2e; • Install AMC-S2e, wait the stabilization period and measure the output signal at TP4 and record as VLOW (use 0.380V for this example). • Calarm: 25 PPM • Cfull scale: 100 PPM (AMC-S2e is calibrated to this value at the factory)

18 • Valarm = (( 25 PPM / 100 PPM) * (1.320V – 0.380V)) + 0.380V = 0.615V RV5 would be adjusted so that 0.615V is measured at TP5. + - MULTIMETER DIGITAL MEASURE VOLTAGE AT SIG. TEST PT. WITH RED (+) LEAD CONNECT BLACK ( - ) LEAD TO GND. PAD TB1 TP7 RV6 RV4 RV5 TP1 TP2 TP3 TP4 TP5 TP6 JB8 JB10 1 R1 Figure 9: Trimmer adjustment and test point locations

19 6 PREVENTIVE MAINTENANCE This section covers all aspects of the Gas Monitor 1A1 series monitor. First, a description of general maintenance is given followed by a verification of operation and sensor replacements. 6.1 GENERAL The monitor unit should be brushed or wiped clean, once a year or more, of any dust or dirt that settles on it, depending on the accumulation. The unit SHOULD NOT be submerged in water or other liquids. Also, hosing and other conditions that could cause a liquid to enter the enclosure should be avoided. 6.2 SCHEDULED CALIBRATION To verify the operation of the system, make sure that the green power LED indicator is on steady state. Push and hold the test button to verify the audio and WARNING and ALARM relays are operational. It is recommended that the AMC S2e (CO) be calibrated a minimum of twice a year, and 4 times a year is preferable. As mentioned, Armstrong Monitoring offers a number of different maintenance plans to suit your requirements. Refer is section 5.6. Whenever the AMC-S2e is recalibrated or replaced, the Gas Monitor should also be recalibrated. 6.3 SENSOR REPLACEMENT The sensor should be replaced when the sensor no longer adequately responds to test gas. Refer to the calibration section 5.6 and follow the calibration steps to apply the test gas to the sensor. CAUTION TURN OFF THE MAIN POWER SUPPLY BEFORE ATTEMPTING THE FOLLOWING PROCEDURE. Refer to the corresponding installation section 4.2.2 AMC-S2e Sensor for proper removal and installation of the sensor. New sensor elements may require calibration; see calibration section 5.6.2.

20 7 INSTALLATION TIPS AND TRICKS CABLING • Cabling – use 2 conductor cable with 2 wire transmitter and 3 conductor cable with everything else. Generally, 18 gauge conductors are used (not true in all cases). Shielded wires are used to connect all gas sensors. • Route cabling in conduit to avoid damage to cabling. • Sensor cable sheath must be grounded at the monitor end only; the cable sheath at the sensor must be clipped short and wrapped with electrical tape to avoid electrical contact with any components in the housing. • Route cabling away from AC power cabling and any source of electro-magnetic interference (EMI) or radio frequency interference (RFI) such as power transformers, electric motors, etc. • All cabling must enter the sensors and monitors from the bottom to ensure protection against water damage due to water inside the conduit from condensation or leaks. • Ensure that there are no short or open circuits in the sensor cabling. • Verify that there is no AC or DC voltage present on the sensor cabling prior to connecting the cabling to either the sensor or the monitor. EQUIPMENT LOCATION • Mount all equipment away from any source of electro-magnetic interference (EMI) or radio frequency interference (RFI) such as power transformers, electric motors, etc. • Mount sensors in accordance with the installation guidelines for the specific species of gas to be detected; i.e. CO sensors should be mounted at breathing height etc. • Equipment must be positioned such that the chance of water damage is minimized; i.e. away from fire suppression sprinkler heads, away from wet or damp locations where there would be a risk of water damage. • Ensure a balanced layout of sensors to cover the intended area. • Ensure that sensors are not in close proximity to clean air sources. POWER AND GROUNDING • All power and grounding connections to equipment must be made in accordance with applicable electrical and building codes. • A separate, dedicated, noise free, 15 amp power circuit, with an appropriately labeled circuit breaker.