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4.6 BURNER START-UP CYCLE
Normal
Thermostat
Motor
Ignition transformer
Valves
Flame
Lock-out
max. 2s
When flame-failure occurs during working, shut down takes place within one second.
4.7 START-UP CYCLE DIAGNOSTICS
During start-up, indication is according to the followin table:
Sequences
Pre-purging
Parts Available from
Ignition phase
Operation, flame ok
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Operating with weak flame signal.
Electrical supply lower than
Lock-out
Extraneous light
Index:
Off
2721
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40s
COLOUR CODE TABLE
~
170V
Yellow
Green
8
Lock-out, due to ignition failure
max. 2s
40s
Red
GB
D4172
3s
Colour code
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