138
Draining gas condensing module on the heating water side
A
C
D
D
B
C
A
B
Fig. 85
1.
Shut off connections
A
and
B
on the heating
water side.
2.
Fit the supplied short hose to the drain valve
C
or
D
and feed into a drain connection.
3.
Open drain valve
C
or
D
.
Note
If necessary, open the air vent valves on the two
outer shut-off valves above the modules.
HK
G
E
F
Fig. 86
4.
If necessary, continue to drain at drain valves
E
,
F
,
G
,
H
and
K
. The drain hose is attached to
the fuel cell module.
Draining the fuel cell module system separation circuit
A
B
C
Fig. 87
1.
Put the fuel cell module into maintenance mode:
See page 72.
2.
Switch the ON/OFF switch of the fuel cell module
to OFF: See page 65.
3.
Attach the drain house to valve
A
and connect it
to a drain.
4.
Open the drain valve on the underside of fitting
A
by turning screw
B
to undo it and pulling it down-
wards.
Note
Check whether the automatic air vent valves
C
are open at the connection lines.
Troubleshooting
Repairs
(cont.)
5853335
Diagnosis