2. Baxi
  3. uSense

Baxi uSense Installation guide

  • Hello! I've reviewed the Baxi uSense Wired Smart Thermostat installation guide. This document provides detailed steps on how to install the thermostat, including wiring for both 230V switched connections and OpenTherm. It also covers important aspects like hot water control and connecting an outdoor sensor. I am here to assist you with any questions you might have about this document.
  • What type of boilers is the Baxi uSense Wired Smart Thermostat compatible with?
    Does the Baxi uSense allow hot water temperature control?
    How does outdoor sensor affect the Baxi uSense?
1
Give your customers

Installation guide
2

1 Compatibility
 
3 Before you start
 
 
 
 
 

Warning: High Voltage wiring must only be installed
and worked on by a suitably qualified person.
3


Warning: High Voltage wiring must only be installed
and worked on by a suitably qualified person.

4

Room unit package:
 
 
 
 
Gateway package:
 
 
 
 
 
1
1 2
3
4 5
2
3
4
5

Positioning the uSense:
The room unit must be positioned taking into
account the following factors:
 
 
 
 
 
•

 

 

Prior to installation make sure to:
1. Isolate the power to the heating and control
system and make safe (remove or lock o fuse)
2. Check that the power has been isolated
using suitable test equipment.
Wear appropriate Personal Protection Equipment
e.g. protective gloves, safety footwear etc.
Warning: High Voltage wiring must
only be installed and worked on by
a suitably qualified person.
1.5 m

6

The gateway





Incorrect wiring will result in damage to the
gateway, room unit and boiler which will invalidate the warranty.
Fix the gateway in position




7
Run power to the gateway




 
 must not

 must

24V
OT ON/OFFR-BUS
8

(See next page if using OpenTherm)
To connect using the ON/OFF terminals
 
ON

 
OFF
 

Connect the system control wiring
to the gateway
Read in conjunction with the boiler
installation and service manual
ON/OFF

OT

R-BUS are for

These components are low
voltage - 230V will damage
the room unit and gateway.

132
143
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
 


9

To connect using the OT terminals
 
 OT
 
Do not connect 230V to these
terminals or it will damage the
gateway
 


 


132
143
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
 


10
To connect the gateway to the uSense
using the R-BUS terminals
 


 

 

 



 


continued opposite
11
 



 



 

 
R-BUS


 The connection between the room
unit and gateway is low voltage,
230V will damage the room unit
and gateway!
12
Set up the uSense room unit
Before turning on the power to the gateway, room unit
and heating system, preliminary electrical tests
should be carried out.
 


 

 

 
13

The uSense room unit will override the hot water temperature controls
on your combi boiler (OpenTherm only).
 

 

 


14

Connecting to an outdoor sensor

ONLY
CANNOT

 
 
 
 Remember to re-enter this code to disable
installer access when you nish adjusting the heating curve
 
 
 
 

 

 

15

Dimensions
 
Power supply
 
 
Electrical connection


Ambient conditions
 
 
 
uSense room unit
16
uSense room unit
Technical data
 
 



 
 
 
17
Compliant with standards:










ErP Fiche Information On modulating
boiler
On modulating boiler,
with outdoor sensor
On On/Off
boiler
Class  


  
18
Temperature
 

 
 
 
 
Gateway
19

The LED on the gateway indicates the following modes and faults:
 
 
 
 
 

For tech support
 
Opening hours



baxi.co.uk
Baxi
 
 
 



e&oe




Warranty registration



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