34
Danger
Contact with live components can lead to seri-
ous injury from electric current. Some compo-
nents on PCBs remain live even after the power
supply has been switched off.
■
Never touch
the wiring chambers (control unit
and power supply connections).
■
When working on the appliance, isolate the
system from the power supply, e.g. at a sepa-
rate MCB/fuse or a mains isolator. Check the
system is no longer live and safeguard against
reconnection.
■
Prior to working on the appliance, wait at
least 4 min until the voltage has completely
dropped out.
F
4x
D
C
B
A
E
Fig. 21
1.
Turn off the ON/OFF switch.
2.
Close the gas shut-off valve and safeguard against
reopening.
3.
Disconnect cables and leads from:
■
Fan motor
A
(2 plugs)
■
Ionisation electrode
B
■
Ignition unit
C
■
Earth
D
4.
Undo gas supply pipe fitting
E
.
5.
Undo 4 screws
F
and remove the burner.
Note
Cover gas connection
E
so that no small parts
can fall into it.
Commissioning, inspection, maintenance
Removing the burner
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