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Baxi uSense Installation Manual
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Baxi uSense Installation Manual

Wired smart thermostat
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Baxi uSense Wired Smart Thermostat Installation guide
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Summary of Contents for Baxi uSense

  • Page 1 Give your customers complete control Baxi uSense Wired Smart Thermostat Installation guide...

  • Page 2: Table Of Contents

    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.

  • Page 3: Compatibility

    1. Compatibility The Baxi uSense Wired Smart Thermostat is compatible with all combi boilers 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.

  • Page 4: In The Box

    2. In the box 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...

  • Page 5: Before You Start

    3. Before you start Wear appropriate Personal Protection Equipment e.g. protective gloves, safety footwear etc. Positioning the uSense: The room unit must be positioned taking into account the following factors: • On an internal wall 1.5m 1.5 m • Away from draughts •...

  • Page 6: Installation

    4. Installation The gateway When connecting the gateway to a combi boiler that has an existing 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.
  • Page 7 Run power to the gateway 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.
  • Page 8 Gateway terminals - OT are for OpenTherm connection to compatible boilers ON OFF Gateway terminals - R-BUS are for connection to the uSense room unit These components are low voltage - 230V will damage ON / OFF the room unit and gateway.
  • Page 9 ON / OFF Installation of OpenTherm connections 1: 24V Power supply 3: Room Unit 4: ON/OFF controlled boiler 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 OpenTherm gateway...
  • Page 10 To connect the gateway to the uSense 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.
  • Page 11 6. Slacken the screws at the sides of the 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.
  • Page 12 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.

  • Page 13: Opentherm Hot Water Control (Combi Only)

    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...

  • Page 14: 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.

  • Page 15: Technical Specifications

    7. Technical specifications uSense room unit 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...
  • Page 16 Technical data Room temperature measurement range 5 - 60°C Maximum temperature deviation at 20°c 0.3°C Maximum room control overshoot 1°C after pre-heating Temperature variation +/- 0.25°C Outside temperature Refer to boiler documentation Temperature control area 10 - 30°C...
  • Page 17 Compliant with standards: 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...
  • Page 18 Gateway Temperature Input 24V, 4W R-BUS 24V, 100mA ON/OFF Max. 70W 30 VDC 230 VAC OpenTherm 4.0 compliant Temperature 0°C - 60°C Insulation class IP21...

  • Page 19: Gateway Led Key

    8. Gateway LED key 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...
  • Page 20 Please note: if you do not register the warranty, a basic 12 month warranty will apply. For full terms and conditions visit baxi.co.uk/usense/terms Please ensure the uSense is installed in accordance with these installation instructions and that you adhere to the Building Regulations.