6.0 Servicing
33
Genie S
6.0 SERVICING
In all cases, before work com-
mences turn off the Mains
Electricity and Gas Supply.
6.1 ROUTINE SERVICING
To ensure continued effi cient operation of the appliance
it is recommended that it is checked and serviced at
regular intervals.
The frequency of servicing will depend upon the par-
ticular installation and usage but in general every 2,000
hours of operation should be the maximum.
It is law that any service work should be carried out by
Registered personnel.
1.
Clean burner and combustion chamber.
2.
Check condition of ignition spark and sensing probe.
3.
Check boiler pipework joints for leaks.
4.
Check the air duct and fl ue seals.
5.
Check condensate syphon and pipework for leaks.
6.
Check the gas rate.
7.
Check the combustion CO and CO
2
.
8. Reset the service hours counter in the control.
Follow the procedures given in the next section “Chang-
ing Components” for parts removal in addition to the
following notes.
Burner & combustion chamber
To view the burner and the inside of the heat exchang-
er it is suggested you remove the front of the heat
exchanger complete with the fan and gas valve:
•
Remove door and front top panel
•
Disconnect the gas elbow fl ange from valve.
•
Unplug fan electrical connectors.
•
Remove air tube from fl ue adapter.
•
Undo cover over Ignition control connections
and remove the two connectors.
•
Pull off the earth lead connection on the valve &
heat exchanger.
•
Undo the four nuts holding the heat exchanger
front and withdraw.
•
Carefully inspect the black silicone seal on the
inside of the burner door, for hardness or splitting.
Replacement is recommended every two years,
but if damaged, replace the seal immediately.
•
Assembly is the reverse.
•
Reset the service hours counter. (See 5.2 for
details)
Spark & sense electrode
•
Turn off the heater.
•
Pull off the HT Lead.
•
Undo the two screws retaining the electrode as-
sembly and carefully withdraw. The spark gap
should be 3.0 mm ± 0.5 mm
(See Fig 12.0)
•
Assembly is the reverse, ensure the gasket is cor-
rectly placed.
Pipework
IMPORTANT
:
The Heat exchanger
connections are made using O rings and
should not be strained in any direction.
Any strain will result in damage to the heat
exchanger and will not be covered by the
warranty.
Condensate syphon
The lower bowl of the Syphon can be unscrewed,
examined and cleaned.
Air duct & fl ue seals
A visual inspection should establish there are no
leaks around any of the seals, including the fl exible
air duct to the venturi.
Gas rate & combustion
See Data table on inside cover for the correct
values.
A combustion sample point is provided on the front
of the fl ue adapter
(see 6.4 for illustration)
Fig 12.0
Summary of Contents for MB20S
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Page 32: ...5 0 Fault finding 32 Genie S Fig 11 0 5 4 SCHEMATIC WIRING ...
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