67
10
Continuation checklist for service
Service task
Carried out on
Select burner operting hours
(
➩
Ch 6.3.2; I43)
I43 =
Select fault memeory
(
➩
Kap. 6.3.4)
Fault
Safety and function check including the
Safety and control components
Check function and safety of air/flue gas system. Check
soundness of flue gas system.
(
➩
Ch.5.5)
Check soundness of fuel and water carrying
system components, carry out visual inspection for
corrosion and wear and tear.
Check demand on the heating system water are met
(
➩
Ch. 3.5) and if necessary check top up water
treatment.
Check gas inlet pressure [mbar]
Carry out O2, CO measurement
Max: O
2
=
(
➩
Ch. 5.5)
CO =
Min: O
2
=
CO =
Select SCOT® base value
(
➩
Ch. 6.3.2; I14)
I14 =
Determine heat exchanger pressure loss (
➩
Ch. 10.3)
Use cleaning kit 481 000 00 26 2.
Electrically isolate the appliance
Close gas isolating valve
Check burner and burner gasket (
➩
Ch. 10.3)
Clean heat echanger
if pressure loss is > 5.0 mbar (WTC 15),
> 4.5 mbar (WTC 25) or > 7.5 mbar (WTC 32)
(
➩
Service instructions cleaning kit)
Check ionissation electrode, replace if
SCOT® base value is < 70 points (WTC 15),
< 75 points (WTC 25) or < 78 points (WTC 32)
Test ignition electrode and check spark gap
(3 mm ± 0.3 mm)
Clean and refill condensate water siphon, check
condensate drain
Reassemble heat exchanger
Replace service cover seal and gas seal
Carry out visual inspection of
electrical wiring
Carry out soundness test gas
and water side (
➩
Ch. 5.3)
Check pre-pressure of expansion tank [bar]
Check fill pressure of system [bar]
Carry out calibration (
➩
Ch. 5.5)
Carry out test operation with DHW, if necessary
vent, check condensate side soundness
Check ignition behaviour, if necessary correct via
parameter P35 (
➩
Ch. 6.3.3)
Ignition time approx. 1.3 sec.
Carry out O2, CO measurement
Max:
O
2
=
(
➩
Ch. 5.5)
CO =
Min:
O
2
=
CO =
Reset service message (I45) (
➩
Ch. 6.3.2)
WCM-FS or WCM-DU
Check date and time and/or time and day
Comments/Notes
(e.g. other parts replaced)
Содержание thermo condens WTC 15-A
Страница 92: ...92 Notes A ...
Страница 93: ...93 A ...