2754
7
GB
4.3 COMBUSTION CHECK
CO
2
It is advisable to not exceed 10% of CO
2
(natural gas)
, in order to avoid the risk that small changes of the
adjustments due, for instance, at draught variation, may cause combustion with insufficient air and consequently
formation of CO.
CO
- Not exceeding 100 mg/kWh (93 ppm).
IONIZATION CURRENT
The minimum current necessary for the control box operation is 3 µA.
The burner normally supplies a higher current value, so that no check is needed. However, if you want to meas-
ure the ionization current, you must open the connector fitted to the red wire and insert a microammeter.
4.4 BURNER START-UP CYCLE
When flame-failure occurs during working, shut down takes place within one second.
4.5 START-UP CYCLE DIAGNOSTICS
During start-up, indication is according to the followin table:
COLOUR CODE TABLE
Sequences Colour code
Pre-purging
● ● ● ● ● ● ● ● ● ● ●
Ignition phase
● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ●
Operation, flame ok
❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑
Operating with weak flame signal.
❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍
Electrical supply lower than
~
170V
● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ●
Lock-out
▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲
Extraneous light
▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲
Index:
❍
Off
●
Yellow
❑
Green
▲
Red
To Next Page
Loading...
