Connection - Baxi MULTIFIT Fitting & Setting Instructions

Fig. 4
X400
Combi Hall Effect
Sensor
Fig. 6
System Water
Pressure Switch
System Models
© Baxi Heating UK Ltd 2010
Fig. 2
Fig. 5
Combi Water
Pressure Switch &
DHW NTC
Fig. 8

3.0 Connection

3.1
1. Ensure that the electrical supply to the boiler is isolated.
Undo the screws securing the facia and lift off the front panel.
Allow the facia to drop down (Fig. 2).
2. Undo the screws securing the cover and release the cover
retaining barbs from their slots. Disengage the rear of the
cover from the facia hinge pin and lift the cover away (Fig. 3).
3. Do not touch the PCB unnecessarily, and take care when
removing and fitting connectors. The use of an earthing
wristband is recommended.
4. Engage the 10 way terminal strip over the vertical flanges
and secure with the screw supplied (Fig. 4).
5. Disconnect the harness connector from position X400 on
the PCB (Fig. 5).
Fig. 3
6. On Combi models disconnect from the Hall Effect Sensor,
DHW NTC and Water Pressure Switch (Figs. 6 & 7).
6. On System models disconnect from the Water Pressure
Switch and Heating Return Sensor (Figs. 8 & 9). Also remove
and discard the Heating Return Sensor.
Fig. 7
Combi Models
System Heating
Return Sensor
Connecting the Sensor
Fig. 9
5