Flue Gas Levels Incorrect, Co Level Too High - Worcester ZSBR 7-28 ICS1 Service Booklet

Flue gas levels incorrect, CO level too high

Check
1. Does the gas supply type match the
specifications on the appliance iden-
tification plate?
B Test gas supply pressure
2.
3. Problem with flue?
B Check CO
level in combustion
2
air.
> 0,2 % CO
2
4. Flue gas CO levels measured at
2
min. and max. load do not match
specified levels?
B Measure CO
2
5. Gas volumetric flow too high when
CO level correctly set
2
6.
1) See installation instructions
7 181 465 347 (01.07)
yes:
no:
1)
, - OK? yes:
no:
yes:
no:
?
yes:
no:
1)
.
levels.
yes:
1)
.
no:
Action
↓2.
B Convert appliance to correct gas type
↓3.
B Decommission appliance.
B Notify gas company.
B Check flue and repair or replace if necessary.
↓4.
B Adjust CO
levels.
2
↓5.
B Reduce gas volumetric flow rate by means of
adjusting screw on gas valve and/or gas flow
restrictor.
B Check CO
adjustment.
2
↓6.
B Change the gas valve.
Rectifying faults
1)
.
37