Baxi 100 He Installation And Servicing Instructions page 30

Washer
Securing
Nut
Control
Knob
Electrical Box
Fig. 47
Securing Screw
H I G
H
L O
W
Fig. 48
Electrical Box
Rear Cover
Electrical
Connections
Fig. 49
Support
Bracket
Flow Switch
Flow Pipe
Clip
30
H IG
H
LO
W
Electrical Box Rear
Cover Securing
Screws
Interface PCB
H IG
H
LO
W
Fig. 50
13.0 Changing Components
13.3 Interface PCB
1. Pull the control knob off the spindle and
remove the securing nut and washer (Fig. 47).
2. Release the electrical box securing screw and
hinge the electrical box down (Fig. 48).
3. Remove the two rear cover securing screws
and remove the rear cover (Fig. 49).
4. Lift the PCB from the electrical box and
remove the electrical connections (Fig. 49).
5. Fit the new PCB and reassemble in reverse
order.
13.4 Flowswitch
(Fig. 50)
1. Drain the boiler
(see Section 13.1 paragraph 2 & 3).
2. Disconnect pipework, loosen elbow locking nut
and undo screws on support bracket.
3. Remove the clip securing the flow pipe to the
flowswitch.
4. Remove the two screws securing the flow
switch to the boiler.
5. Disconnect the inline electrical connection.
6. Remove the flowswitch.
7. Fit the new flowswitch and reassemble in
reverse order.
8. Recommission the boiler and check the
inhibitor concentration (see Section 6.2 and 10.1).