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8.0 Annual Servicing
19
8.1
Annual Servicing
1. To perform annual servicing of the back boiler
it is necessary to remove the firefront.
2. After servicing, complete the relevant section
of the
“
Benchmark
”
Installation, Commissioning
and Service Record Log Book. This should be in
the possession of the user.
8.2
Removal of Firefront
1. Isolate the electrical supply to the appliance.
2. Turn the gas service tap to the off position
(Fig. 30).
3. Refer to the separate firefront instructions for
the removal of the firefront.
8.3
Removal of Controls
1. Turn the boiler thermostat to "O" position
(Fig. 31).
2. Pull the electrical input plug from the socket
on the P.C.B. (Fig. 33).
3. Disconnect the union at the gas service cock
and remove the fire feed pipe (Fig. 35).
4. Remove the thermostat sensor and retaining
strip from the boiler (Fig. 32).
5. Undo the nut on the sensing pipe at the
adaptor (Fig. 34).
6. Undo the four screws retaining the door and
remove the door (Fig. 36).
7. Undo the two screws retaining the controls to
the combustion box sides (Fig. 35).
8. Undo the screw holding the controls to the
combustion box base tray (Fig. 35).
9. Withdraw the controls from the boiler.
Gas Cock
Off Position
Fig. 30
Fig. 31
Fig. 32
Fig. 34
Thermostat Sensor
Retaining Strip
Input Plug
Thermostat Knob
Base Tray Screw
Securing Screw
Union Nut
Sensing Pipe
Adaptor
Fig. 35
Fig. 36
Fig. 33
