4.
Continue to fill the system.
5.
Close boiler fill & drain valve
A
.
Venting the boiler
1.
Close the shut-off valves on the
heating water side.
2.
Connect the drain hose between
top valve
B
and a drain outlet.
3.
Open valves
A
and
B
, and vent
at mains pressure until no sound of
escaping air can be heard.
4.
Close valves
A
and
B
and open
the primary shut-off valves.
Further details regarding the individual steps
(cont.)
8
Initial start-up, inspection, maintenance
5692
536
GB
Summary of Contents for Vitoplus 300
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