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13.0 CHANGING COMPONENTS
Publication No. 5106451
The removal of the fan is necessary to enable the
changing of the injector pipe, condensate trap
and gas valve (see section 13.8).
13.9
Injector Pipe
(Fig. 55)
1. Remove the injector pipe by pulling out from the
‘O’ ring joint in the gas valve.
2. Fit the new injector pipe and reassemble in
reverse order.
13.10
Gas Valve
(Fig. 55)
1. Release user interface and pivot downward for
better access.
2. Disconnect the gas inlet union at the gas tap.
3. Undo the case pressure pipe from the gas valve.
4. Undo the screw and disconnect the electrical plug
from the gas valve.
5. Remove the two gas valve securing screws from
inside the air box holding the gas valve.
6. Remove the gas valve from the airbox side.
7. Remove the nut union, aluminium spacer and its
gasket from the gas valve.
8. Fit the nut union, aluminium spacer and its gasket
to the new valve.
9. Fit the new gas valve and reassemble in reverse
order.
13.11
Condensate Trap
(Fig. 56)
1. Disconnect the condensate trap from the base of
the heat exchanger.
2. Disconnect the condensate drain (outside the
boiler) from the condensate trap.
3. Undo the condensate trap lock nut.
4. Remove the condensate trap from the boiler.
5. Disconnect the sensor leads.
Fit the new condensate trap and reassemble in
reverse order.
Injector Pipe
Gas Tap
Case Pressure
Pipe
Boiler Side
Electrical Plug
Gas Valve
Gas Valve
Securing Screws
Nut Union
Fig. 55
Fig. 56
Aluminium
Spacer
‘O ring’
Gasket
Lock Nut
Condensate
Trap
Condensate
Drain Pipe
Securing Nut
Sensor
Leads
