30
Dismantling the Boiler
To ensure the continued safe and efficient operation
of the appliance, it is recommended that it is checked
and serviced as necessary at regular intervals.
The frequency of servicing will depend upon the
particular installation conditions and usage but in
general once per year should be adequate. It is the
law that all servicing work is carried out by a
competent person such as British Gas or other
CORGI registered personnel.
Before servicing please read the Important
Information section on page 5.
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.
ISOLATE THE ELECTRICAL SUPPLY
TO THE BOILER.
Remove lower door panel following the
sequence of diagrams.
To remove the outer case from the boiler,
take out the two screws and washers. Draw outer
case forward and clear of the boiler.
1
Turn off gas supply at the service tap and disconnect
the union.
2
Disconnect the electrical plug on the gas valve by
removing screw and pulling forward.
3
Disconnect the two wires from the overheat
thermostat.
4
Loosen the screw on the capillary
retaining washer, allowing the washer to
move freely. Release the capillaries
from the clips on the side of the
combustion box. Remove both phials
from the thermostat pocket.
5
Remove brass sealing plug with fibre washer.
6
Loosen the six screws sufficiently
for the removal of the combustion
chamber door.
Remove the combustion
chamber door complete with the
burner.
NOTE: When re-assembling, care
must be taken to align the overheat
thermostat capillary with the groove in
the main thermostat phial.
ANNUAL SERVICING
1
1
2
3
4
5
6
3
2
British Gas Service
Test Point. For use
by B.G. personnel
only.
