Thermostat Sensor; Thermostat Potentiometer - Baxi Bermuda 45/4 M Installation And Servicing Instructions

CHANGING COMPONENTS - Page 34

Thermostat Sensor

ELECTRONIC CONTROLS ONLY
Undo the three screws retaining the control box cover and
remove the cover.
Disconnect the thermostat sensor plug from the PCB.

Thermostat Potentiometer

ELECTRONIC CONTROLS ONLY
Remove the controls heat shield from its retaining clips if not
already done so.
Undo the three screws retaining the control box
cover and remove the cover.
Disconnect the thermostat potentiometer plug from the PCB
and remove the potentiometer wires from their guide slot in
the control box side.
Undo the screw holding the thermostat potentiometer to the
controls mounting bracket and remove the potentiometer by
disengaging its locating tab.
Reassemble in reverse order.
Printed Circuit Board
ELECTRONIC CONTROLS ONLY
Remove the controls heat shield from its retaining clips if not
already done so.
Undo the three screws retaining the control box cover and
remove the cover.
Disconnect the three multi-pin plugs, flame sensing lead and
ignition lead from the PCB, noting their
positions.
Undo the screw retaining the valve cover and remove the
cover.
Pull the valve wiring grommet out of the slot in the control
box.
Disconnect the lead from the upper solenoid connection.
Undo the screw retaining the control box and remove the
box.
Push out the black rivet retaining the PCB.
Fit the new PCB using the rivet.
Reassemble in reverse order.