Baxi uSense Installation Manual

3 Before you start 4 Installation 5 OpenTherm hot water control (combi only) 6 Outdoor sensor 7 Technical specifications 8 Gateway LED key You can find more detailed instructions at www.baxi.co.uk Warning: High Voltage wiring must only be installed and worked on by a suitably qualified person. ...

using the 230V switched live and also has OpenTherm capability. Warning: High Voltage wiring must only be installed and worked on by a suitably qualified person. 1. Compatibility ...

Room unit package: 1 User guide 2 Room unit 3 Screw and plug fixings 4 Mounting bracket Gateway package: 1 The gateway 2 Installation guide 3 Screw and plug fixings 4 230V power adaptor 5 Adhesive pad for power adaptor 1 1 2 3 4 5 2 3 4 ...

Positioning the uSense: The room unit must be positioned taking into account the following factors: • On an internal wall • Away from draughts • 1.2-1.5m from the floor • Not behind doors, bookcases or other objects • Not in direct sunlight • In a room where the user spends most of their time • Away from heat sources (fireplace, radiators, light, candles, etc.) • The maximum cable length from the gateway to the room unit is 50m Prior to installation make sure to: 1. Isolate the power to the heating and control system and make safe (remove or lock off fuse) 2. Check that the power has been isolated using suitabl ...

programmer and/or thermostat, it is essential that the function of all wiring is established prior to work. Make sure you identify the L (live), N (neutral), E (earth), common and call for heat switched live correctly before connecting. Incorrect wiring will result in damage to the gateway, room unit and boiler which will invalidate the warranty. Fix the gateway in position Determine the position of the gateway. It should be close to either the boiler or control system junction box. Make sure there is enough space around the gateway for installation and mai ...

Use the power adaptor supplied to connect the gateway to the L (live) and N (neutral) connectors on the boiler or junction box. Connect the plugged end of the power adaptor into the 24V terminal on the gateway. 1. All cables must be supported 2. The power adaptor and wiring must not be inside the boiler 3. The power adaptor must be supported (adhesive pad is supplied for this). 24V OT ON/OFF R-BUS ...

(See next page if using OpenTherm) To connect using the ON/OFF terminals 1. Connect the common from the boiler or junction box to the ON terminal on the gateway. 2. Connect the switch live terminal or junction box to the OFF terminal on the gateway 3. The cable used must be 0.75mm multi strand flexible cable conforming to BS 50525-2-11. Connect the system control wiring to the gateway Read in conjunction with the boiler installation and service manual Gateway terminals - ON/OFF are for 230V switching Gateway terminals - OT are for OpenTherm connection to compatible boilers Gateway terminals - R-BUS are for ...

To connect using the OT terminals 1. Connect the OpenTherm connectors on the boiler to the OT terminals on the gateway Do not connect 230V to these terminals or it will damage the gateway 2. These will communicate with the boiler to control the heating and other functions 3. These connections can be made using bell wire. There is no polarity at the OT terminals. 1 3 2 1 4 3 1: 24V Power supply 2: OT controlled boiler 3: Room Unit 1: 24V Power supply 3: Room Unit 4: ON/OFF controlled boiler OpenTherm ON / OFF 1 OT ON OFF 1: 24V Power supply 3: Room unit 2: OpenTherm controlled boiler ...

using the R-BUS terminals 1. Choose a suitable location for the uSense thermostat (see Before you start section on page 5) 2. Remove existing thermostat (if applicable) 3. Fix the room unit backplate to the wall using the screws provided 4. Either use existing thermostat wires or run new wires from the gateway (there is no polarity - either wire can be connected to either position) 5. Trim the wires coming out of the wall, connect them into the connector block on the room unit backplate continued opposite ...

connectors and insert each wire into the top at either side of the connector, then re-tighten the screws 7. Make sure the wires are as flat as possible against the back plate so that they do not interfere with the controller when it is mounted in position 8. Press the room unit onto the backplate until it clicks into place 9. Connect the other end of the wires to the R-BUS terminals in the gateway (there is no polarity - either wire can be connected to either position) 10. The connection between the room unit and gateway is low voltage, 230V will damage the room unit and gateway! ...

Before turning on the power to the gateway, room unit and heating system, preliminary electrical tests should be carried out. 1. These should be carried out using a suitable meter, and include checks for earth continuity, resistance to earth, short circuit and polarity 2. Turn on the power to the gateway and check that the gateway and room unit power up. See page 19 for LED key 3. Download the Baxi uSense Smart Thermostat App and create a uSense account 4. Use the user guide (supplied) to set up uSense. ...

The uSense room unit will override the hot water temperature controls on your combi boiler (OpenTherm only). 1. The room unit will automatically default the hot water temperature to 60°C when connected by OpenTherm 2. The room unit will automatically default the heating flow temperature to 80°C when connected by OpenTherm 3. These settings can be adjusted to your required comfort level using the uSense room unit only (the boiler controls and App can’t adjust these settings when the room unit is connected with OpenTherm). ...

Connecting to an outdoor sensor If an outdoor sensor weather compensator is connected in conjunction with the uSense (OpenTherm installations only) you can ONLY adjust the heating curve on the uSense App (you CANNOT adjust using the room unit or boiler controls). 1. Open the Baxi uSense App 2. Click on the installer menu 3. Click on advance settings 4. Enter service code 0012 Remember to re-enter this code to disable installer access when you finish adjusting the heating curve 5. You will see a message ‘Your access level has been updated’ 6. Click OK 7. Click on heating curve 8. Change the curve to suit the requirements of t ...

Dimensions Width x height x depth (maximum dimensions) 120 x 90 x 27mm Power supply R-Bus connection voltage 24V ± 5% Maximum power consumption 1.5W Electrical connection Maximum cable length for dedicated room unit R-Bus 50m Ambient conditions Storage temperature 25 - 70°C Relative humidity 5 - 95°C Condensation is not allowed Operating conditions 0 - 60°C uSense room unit ...

Technical data Room temperature measurement range 5 - 60°C Maximum temperature deviation at 20°c 0.3°C Maximum room control overshoot after pre-heating 1°C Temperature variation +/- 0.25°C Outside temperature Refer to boiler documentation Temperature control area 10 - 30°C ...

EMC: 108/2004/EC, EN 55022, 55014 Immunity: EN2-6-61000 EN2-6-61000 (EMC part 6.2 generic standards) ETSI-EN 17-489 301 (electromagnetic compatibility and radio spectrum matters) R&TTE Directive 5/1999/EC EN 1-60950 (ITE - Safety - Part 1: general requirements) Low voltage directive (95/2006/EC) WEEE directive (96/2002/EC) (disposal requirements) Drop test: IEC 32-2-60068 Protection classification: IP22 ErP Fiche Information On modulating boiler On modulating boiler, with outdoor sensor On On/Off boiler Class V VI IV Contribution to space heating energy efficiency 3% 4% 2% ...

OpenTherm 4.0 compliant Temperature 0°C - 60°C Insulation class IP21 Gateway ...

The LED on the gateway indicates the following modes and faults: Starting up Gateway in operation No boiler detected (check connections and wiring) No room unit detected (check connections and wiring) Internal error (turn all power off, reinstate and perform setting procedure again) For technical support call 0344 871 1545 ...

0344 871 1545 Opening hours Monday - Friday, 8.00am-6.00pm Weekends and Bank Holidays, 8.30am-2.00pm Please note calls may be recorded for training and monitoring purposes baxi.co.uk Baxi Brooks House, Coventry Road, Warwick. CV34 4LL 7689362-01 (10/17) Please ensure the uSense is installed in accordance with these installation instructions and that you adhere to the Building Regulations. e&oe All descriptions and illustrations provided in this document have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this booklet. All go ...