29
A
C
B
Fig. 20
1.
Close the shut-off valves on the heating water side.
2.
Remove cover panel
A
.
3.
Push the drain hose onto air vent valve
B
and con-
nect to a drain.
4.
Open air vent valve
B
and fill valve
C
in the heat-
ing return and vent (flush) using mains pressure
until no more air noise can be heard.
5.
First close air vent valve
B
.
6.
When the required operating pressure has built up,
close fill valve
C
. Open the shut-off valves on the
heating water side.
7.
Remove the drain hose from air vent valve
B
and
retain.
Venting the heating system
A
Fig. 21
1.
Close the gas shut-off valve and switch the control
unit ON.
2.
Check whether the air vent screw in quick-action air
vent valve
A
of the heating circuit pump is open.
3.
Activate venting program (see following steps).
Note
For function and sequence of the venting program,
see page 128.
Commissioning, inspection, maintenance
Venting the boiler
5773 216 GB
Summary of Contents for B2TA
Page 101: ...101 Parts lists Overview of assemblies 5773 216 GB Components ...
Page 107: ...107 Parts lists Hydraulics 5773 216 GB Components ...
Page 118: ...118 0004 0002 0005 0006 0001 0003 Fig 77 Parts lists Miscellaneous 5773 216 GB Components ...
Page 142: ...142 5773 216 GB ...
Page 143: ...143 5773 216 GB ...
