6 720 610 576 GB (03.02)
36
Maintenance
Diaphragm in mixer unit
B
Open mixer unit (29).
B
Carefully withdraw diaphragm (443) from fan intake
tube and check for soiling and splits.
Fig. 57
B
Carefully refit diaphragm (443) the correct way
round into the fan intake tube.
B
Seal the mixer unit (29).
Condensation trap
In order to prevent spillage of condensate, the conden-
sation trap should be completely removed, (see
page 34, fig. 51).
B
Unscrew condensation trap and check connection
to heat exchanger is clear.
B
Remove condensation trap cover and clean.
B
Fill condensation trap with approx. 1/4 l of water and
refit.
Electrode assembly
B
Switch off the master switch.
B
Pull off the leads from the electrodes. Refer to fig. 2.
B
Unscrew the two fixing screws and carefully remove
the electrode assembly. Refer to fig. 50.
B
Clean the electrodes with a non-metallic brush. (The
spark gap should be 4,5 mm ± 0,5 mm.)
B
Replace and re-connect the assembly taking care
not to mislay the inspection window.
Siphon
B
Unscrew the clip and disconnect the pipe to the
siphon.
B
Remove the yellow plug to drain the siphon.
B
Unscrew the securing nut from beneath the side
facia and remove the siphon. Refer to figure below.
B
Refit and prime the siphon.
Fig. 58
Expansion vessel
The expansion vessel should be checked once a year.
B
Depressurise appliance.
B
If necessary, adjust expansion vessel charge pres-
sure to static head of the heating system.
B
Take care not to damage diaphragm
(443) when removing and refitting it.
i
The flaps of the diaphragm (443) must
open upwards.
1.
2.
3.
443
29
6 720 610 790-07.2R
6 720 610 602 - 16. 1O
Siphon
Condensate
Drain
Summary of Contents for GREENSTAR HE combi Series
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