E93.1001EN.C Manual CD
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103
14.4
Adjusting procedures
Procedures 1 and 2, referred to in the previous sections 14.2 and14.3 are described here:
Procedure 1: adjust at maximum load
In case B (replacement of gas valve or gas conversion): consult §14.3. before starting procedure 1 below.
Carry out the next 4 steps:
1.
Press [SERVICE] button for about 3 seconds.
Display message
H E A T I N G : S e r v i c e
2 6 %
> > >
1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
Water heater is activated and operates at service mode at 26% (minimum). (example)
2.
Press [▲] button until maximum load is reached:
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 )
Water heater is activated and operates at service mode at 100% (maximum). (example)
3.
Measure the CO
2
percentage at the flue gas outlet.
4.
By setting screw [2], adjust the gas valve to obtain the CO
2
value of table 1 or the figures.
NOTICE: For the CD+120, 150 and 180 water heaters use only the RIGHT side gas valve for adjusting.
Decrease CO
2
percentage
Turn screw [2] right (clockwise)
Increase CO
2
percentage
Turn screw [2] left (counter clockwise)
The service operation of the water heater will be active for 40 minutes.
After this period the water heater will return to normal operation.
Procedure 2: adjust at minimum load
In case B (gas conversion or replacement of gas valve): consult § 14.3 before starting procedure 2 below.
Carry out the next three steps:
1.
Press [▼] button until minimum load is reached.
Display message
H E A T I N G : S e r v i c e
2 6 %
> > >
1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
Water heater is activated and operates at service mode at 26% (minimum).
2.
Measure the CO
2
percentage at the flue gas outlet.
3.
By setting screw [1], adjust the gas valve to obtain the CO
2
value of table 1.
NOTICE: For the CD+120, 150 and 180 water heaters use only the RIGHT side gas valve for adjusting.
Decrease CO
2
percentage
Turn screw [1] left (counter clockwise)
Increase CO
2
percentage
Turn screw [1] right (clockwise)
The service operation of the water heater will be active for 40 minutes.
After this period the water heater will return to normal operation.
CO2
[2]
CO2
[2]
CO2
[1]
CO2
[1]