66
10
A
10.2 Check list for servicing the WTC
Service task
Carried out on
18.07.08
Select burner operting hours
(
➩
Ch 6.3.2; I43)
I43 =
1500
Select fault memory
2x F22
(
➩
Ch. 6.3.4)
Fault
1x F42
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]
20
Carry out O2, CO measurement
Max: O
2
=
5.5 %
(
➩
Ch. 5.5)
CO =
22 ppm
Min: O
2
=
5.5 %
CO =
12 ppm
Select SCOT® base value
(
➩
Ch. 6.3.2; I14)
I14 =
85 points
Determine heat exchanger pressure loss (
➩
Ch. 10.3)
Use cleaning kit 481 000 00 26 2.
6 mbar
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)
cleaned
(
➩
Service instructions cleaning kit)
4 mbar
Check ionissation electrode, replace if
SCOT® base value is < 70 points (WTC 15),
replaced
< 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]
0.7
Check fill pressure of system [bar]
1.3
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
=
5.5 %
(
➩
Ch. 5.5)
CO =
22 ppm
Min:
O
2
=
5.5 %
CO =
11 ppm
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
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