Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 54

Commissioning, inspection, maintenance
Filling the fuel cell module and heating water...
C
Fig. 51
1. Check and if necessary adjust the pre-charge pres-
sure at test connector
sion vessel.
Set value: 0.9 bar (0.09 MPa)
2. Connect the drain hose to air vent valve
the drainage system.
3. Turn the lever of tap
C
The fuel cell module is filled in this position.
54
H B
G
D F
E
on the diaphragm expan-
A
B and to
to position .
E
(cont.)
A
K
4. Fill the fuel cell module via tap
Vent via:
Air vent valve
■ G
ule
■ Air vent valves
K
ule
Note
Place a suitable container below air vent valves
and to catch any fill water that escapes. Dry off
K
any moisture that may appear on the fuel cell mod-
ule.
5. Once no more air is escaping through the air vent
valves, turn tap C
Close air vent valves
.
C
at the front of the fuel cell mod-
at the top of the fuel cell mod-
to position F .
and .
G K
G