68
!
Please note
Unsuitable fill water increases the level of
deposits and corrosion. This can cause damage
to the appliance.
■
The fill and top-up water must be softened,
e.g. with a small heating water softener.
■
Permissible total hardness of the fill and top-
up water: < 3.0 mol/m
3
(16.8 °dH)
■
Antifreeze must not be added to the fill or top-
up water.
G
A
C
D
F
E
B
H
Fig. 64
0
1.
Close valves
A
and
B
. Turn large wheels clock-
wise.
0
2.
Connect fill hose to filling connector
C
.
0
3.
Open fill valve
D
. Loosen the white screw by
turning it and pull it downwards.
0
4.
Connect drain hose to drain connection
E
.
0
5.
Open drain valve
F
. Loosen the white rotary
selector by turning it and pull it upwards.
0
6.
Fill with water via filling connection
C
until no air
escapes from the drain hose at drain
connection
E
.
Note
Ensure that the pressure in the system separation
circuit does not exceed 1.5 bar during the entire
filling process. Regulate pressure on drain
valve
F
and check on pressure gauge
G
.
0
7.
Convert the fuel cell 3-way valve using the soft-
ware tool or the actuator and sensor test (fuel cell
group, see page 108):
1. In Heating position, flush with filling water for 2
mins.
2. In DHW position, flush with filling water for 2
mins.
3. In middle position
0
8.
Open valves
A
and
B
. Turn large wheels anti-
clockwise.
0
9.
Flush with filling water again.
10.
Close fill valve
D
and open drain valve
F
. Adjust
pressure to 1.5 bar at the same time.
11.
Check whether air vent valves
H
are open.
12.
Commission the fuel cell circulation pump using
the software tool or the actuator and sensor test:
System separation circuit pump ON
Commissioning, inspection, maintenance
Filling system separation circuit fuel cell module
5853335
