58
A
D
B C
Fig. 54
1.
Close the shut-off valves on the heating water side.
2.
Remove cover panel
A
.
3.
Push drain hose
B
onto air vent valve
C
and
connect to a drain.
4.
Open air vent valve tap
C
and fill valve
D
on the
heating return and vent (flush) under mains pres-
sure until air noise can no longer be heard.
5.
First close vent valve
C
.
6.
Once the required operating pressure has built up,
close fill valve
D
. Open the shut-off valves on the
heating water side.
7.
Remove drain hose
B
from fill valve
C
and keep
safe.
Gas condensing module only: Switching on mains power and control unit
A
Fig. 55
1.
Ensure that ON/OFF switch
A
on the
fuel cell
module
is switched off (0).
2.
Close the gas shut-off valve.
3.
If the
gas condensing module
was not already
switched on for filling, switch on mains power and
control unit.
Commissioning, inspection, maintenance
Venting the gas condensing module
5775 636 GB
Summary of Contents for C3TB
Page 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Page 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Page 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Page 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
Page 187: ...187 5775 636 GB ...
