Installation Instructions

26
Venting the boiler by flushing
Gas condensing boiler
BC
A
1. Connect the drain hose on shut-off
valve
A
to a drain.
2.
Close shut-off valve B.
3.
Open valves A and C and flush at
mains pressure, until no sound of
escaping air can be heard.
4.
First close valve A and then valve
C
.
5.
Adjust operating pressure ≥ 0.8 bar
with valve
C
.
6.
Open shut-off valve B.
7. Disconnect drain hose and put to one
side.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5609 059 GB