
6.
Close boiler fill valve
C
.
Venting the boiler
1.
Close the shut-off valves on the
heating water side.
2.
Remove front insulation shell
A
(if
already fitted).
3.
Connect the drain hose on air vent
valve
B
with a drain.
4.
Open valves
B
and
C
and vent
using mains pressure until no more
air noise is audible.
5.
Close valves
B
and
C
and open
the heating water shut-off valves.
Further details regarding the individual steps
(cont.)
8
Commissioning, inspection, maintenance
5692
745
GB
Содержание VC3
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