42
4.
Check the system pressure.
5.
Open the gas shut-off valve.
Activating the venting function
Service menu
1. Press
OK
and
å
simultaneously for approx. 4 s.
2.
"Service functions"
3.
"Venting"
Venting function is enabled.
4. Ending venting function:
Press
OK
or
ä
.
Filling the siphon with water
A
B
C
Fig. 33
1.
Pivot the control unit forwards.
2.
Remove retaining clip
A
.
3.
Pull filler pipe
B
upwards.
4.
Remove trap
C
downwards.
5.
Fill siphon with water and refit.
6.
Check that the condensate pipe is connected cor-
rectly to the siphon and heat exchanger.
Note
Route the drain hose without any bends and with a
constant fall.
7.
Refit the cover panel.
8.
Secure the control unit back in the operating posi-
tion.
Commissioning, inspection, maintenance
Venting the heating system
(cont.)
5773 238 GB
