35
Venting the heating system
1.
Close the gas shut-off valve and
switch the control unit ON.
2.
Activate venting program (see next
steps).
Note
For function and sequence of the
venting program, see page 154.
3.
Check the system pressure.
Activating the venting function
Weather-compensated control unit
Constant temperature control unit
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
.
Service menu
1. Press
OK
and
å
simultaneously for
approx. 4 s.
2. Select
"
5
"
with
Ú
and confirm with
OK
.
"ON"
flashes.
3. Activate the venting function with
OK
.
"EL on"
is shown constantly.
4. Ending venting function:
Press
ä
.
Filling the siphon with water
E
F
C
D
A
B
1.
Pull off cap
A
downwards.
2.
Undo hose
B
.
3.
Undo union nut
C
and pull off siphon
D
downwards.
4.
Fill siphon
D
with water and refit it.
5.
Refit hose
B
.
6.
Push on cap
A
from below.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5623 520 GB
Service
Содержание Series B2HA 40
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