Strebel S-WG 100, Installation, Operating And Maintenance Manual, Page: 101 / 125

E09.012.246 Manual S-WG
102
14.4 Adjusting procedures
Procedures 1 and 2, referred to in the previous sections 14.2 and 14.3, are described here:
Procedure 1: adjust at maximum load
In case B (gas conversion or replacement of gas valve): consult § 14.3. before starting procedure 1 below.
Carry out the next 4 steps:
1. Press [SERVICE] button for about 3 seconds.
Display message W A T R H T R : 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.
Press [▲] button until maximum load is reached:
Display message W A T R H T R : 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).
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.
NOTICE: For the S-WG 120, 150 and 180 water heaters use only the RIGHT side gas valve for adjust-
ing.
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 3 steps:
1.
Press [▼] button until minimum load is reached.
Display message W A T R H T R : 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 120, 150 and 180 kW 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]