Strebel S-CB Px 120, Руководство по установке, эксплуатации и техническому обслуживанию

Страница: 85 / 118

S-CB Px 120 Manual 85
14.
ADJUSTING AND SETTING THE BURNER
The burner must always be adjusted and set when:
•
A new boiler is installed
•
A service and maintenance check has been done
•
The gas control safety valve has been (re)placed
After these proceedings always check the gas/air ratio of the combustion figure (CO
2
) at minimum and maximum
input. First set the boiler at maximum load and subsequently set at minimum load. See the following description.
14.1. Setting at the maximum load
To start up the boiler in service mode press the [SERVICE] button for around 3 seconds. After that the boiler will
start up and when the service mode is activated the following screen will appear.
Display message
H E A T I N G : S e r v i c e 2 7 %
> > > 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
Reason: Boiler is activated and operates at service mode at 27% (minimum).
Use the [ ▲ ] button to increase the actual load of the service (percentage) to the maximum. The following screen
will appear.
Display message
H E A T I N G : S e r v i c e 1 0 0 %
> > > 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
Reason: Boiler is activated and operates at service mode at 100% (maximum).
When the boiler operates at maximum load, measure the CO
2
percentage at the flue gas outlet of the boiler. This
value should match the values given in the table below. When needed, adjust the gas valve setting by the adjust-
ing screw [2], see the drawing on last page (p 84).
Decrease CO
2
percentage Turn screw [2] right (clockwise)
Increase CO
2
percentage
Turn screw [2] left (counter clock-
wise)
Now continue for the setting at minimum load.
The service operation of the boiler will be active for 40 minutes. After this period the boiler will return to normal
operation.
1
Measured without boiler door.
2
Butane, propane or B/P mixtures only with air restrictor and venturi directly mounted on the fan, see also instruc-
tion for butane/propane kit. A butane/propane (B/P) kit is needed, see accessories list, page 13.
3
If measured CO
2
values match table values within ± 0,3% (O
2
values within ± 0,5%), no setting is needed.
In all cases where setting is needed: set the gas valve until measured CO
2
values match table values within ±
0,1% (O
2
values within ± 0,2%).
CO2 [2]
CO2 [2]
Gas type Nat. Gas G20
1
Nat. Gas G25
1
Prop. G31
1, 2
Buta. (B/P)G30
1, 2
Cal. Value Hi (EN437) (MJ/m
3
) 34,02 29,25 88,00 116,09
2
CO
2
max. output (%)
3
9,0 9,0 10,3 10,4
O
2
max. output (%)
3
4,9 4,9 5,2 5,3
CO
2
min. output (%)
3
8,5 8,5 9,6 9,6
O
2
min. output (%)
3
5,7 5,7 6,2 6,5