Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual page 51

Filling the fuel cell module system separation...
B
C A
Fig. 47
01. Close the gas shut-off valve.
02. Push the supplied drain hose (4 m long) onto fit-
ting at vent connection
B
hose with a clamp and place it in the drain.
03. Open drain connection
connection (max. 6 turns).
Note
If the threads fail to engage when closing, push
the connection slightly downwards when closing.
04. Fully open valves ,
B
05. Check that valve
E is fully closed.
06. Fully open valve on the cylinder.
F
D
E
. Secure the drain
A
fully by rotating the
A
and .
C D
Commissioning, inspection, maintenance
(cont.)
E
D
K
F
G
H
07. Remove cap from drain & fill valve
G
nect the fill hose.
08. Open fill & drain valve
ting by turning the screw to undo it and pulling
F
it downwards.
Note
If the control unit has not been switched on prior to
filling the system, the servomotor of the diverter
valve will still be in its central position. The system
will then be completely filled.
If the control unit has been switched on prior to fill-
ing, move the diverter valve to its central position
via an actuator test. Fuel cell module 3-way valve
in the fuel cell module group. See page 98 and
step 12.
C
A
B
and con-
H
H on the underside of fit-
51