Filling System Separation Circuit Fuel Cell Module - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance

Filling system separation circuit fuel cell module

!
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
■ Antifreeze must not be added to the fill or top-
up water.
E F
A
C
D
Fig. 64
01. Close valves and
A
wise.
02. Connect fill hose to filling connector
03. Open fill valve . Loosen the white screw by
D
turning it and pull it downwards.
04. Connect drain hose to drain connection
05. Open drain valve
F
selector by turning it and pull it upwards.
06. Fill with water via filling connection
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 and check on pressure gauge
F
68
3
(16.8 °dH)
B
. Turn large wheels clock-
B
C .
E .
. Loosen the white rotary
C until no air
.
G
H
G
07. 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
08. Open valves and
A
clockwise.
09. Flush with filling water again.
10. Close fill valve
D
pressure to 1.5 bar at the same time.
11. Check whether air vent valves
12. Commission the fuel cell circulation pump using
the software tool or the actuator and sensor test:
System separation circuit pump ON
. Turn large wheels anti-
B
and open drain valve . Adjust
F
are open.
H