40
Service Manual
Overview of work steps with service log
No.
Work step
Log item
1
Switch off device, Emergency-switch off
2
Close gas feed,
3
Close service cocks and drain water
4
Remove cover and combustion area housing
5
Remove the electrical connections on the fan, sensors
and electrodes
6
Remove mixing chamber, fan, burner flange
7
Remove burner, clean as needed
8
Clean hot water heat exchanger, clean as needed
O
9
Clean condensate sump
O
10
Clean mixing chamber as needed
O
11
Check combustion chamber insulation for damage
O
12
Check seals, replace as needed and apply silicon grease
O
13
If neutralization is present, refill with granulate
O
14
For enameled hot water storage, check magnesium sacrificial anode every 2 years
O
15
Reassemble device
16
Clean siphon, fill, mount, and ensure firm seat
O
17
Decalcify hot water heat exchanger as needed
O
18
Clean hot water sieve
O
19
Check expansion vessel
O
20
Fill device to 1.5 - 2.5 bar and vent
O
21
Open gas feed, switch device on
22
Check hydraulics for leaks
O
23
Check for gas leaks
O
24
Check for exhaust system leaks
O
25
Check starter
O
26
Check the interplay with control accessory
O
27
Measure exhaust gas in chimney sweep mode
O
28
Gross exhaust gas temperature
°C
29
Intake air temperature
°C
30
Net exhaust gas temperature
°C
31
Carbon dioxide content (CO2)
%
32
or oxygen content (02)
%
33
Carbon monoxide content (CO)
%
34
Exhaust gas loss
%
Confirm service (company stamp, signature)
Date
