52
If actual CO
2
values are greater or O
2
values are lower,
then pressure test the flue pipe with a static pressure
of 200 Pa.
Danger
Escaping flue gas can damage your health.
After the tightness test, re-seal the test port with
the plug.
5-yearly maintenance of fuel cell module
Note
Before carrying out the maintenance work:
■
The fuel cell module must be in maintenance mode.
Switch ON maintenance mode: See chapter "Switch-
ing on maintenance mode".
To save time, the system user can activate mainte-
nance mode in advance.
■
The distilled water must have been drained.
■
The lower front panel must be removed: See chapter
"Removing the front panels".
Draining the distilled water
Note
It takes about 15 min to drain the distilled water
(approx. 4.5 l).
C
A
B
Fig. 42
0
1.
Remove programming unit cover
A
.
0
2.
Close the gas shut-off valve.
0
3.
Check that the fuel cell module is in maintenance
mode:
"MNT"
indicator should be illuminated.
If not, switch on maintenance mode: See chapter
"Switching on maintenance mode".
Note
The cooling process on the fuel cell module lasts
approximately 90 min. The cooling process is
complete when
"P0"
appears under
ITEM 30
in
STATE
.
Danger
If the wait time is not observed, there is a
risk of scalding and damage to the appli-
ance.
Only carry out maintenance work when the
fuel cell module is cold.
0
4.
Use to select
"22"
.
0
5.
Press and hold
SET
for at least 3 s.
In
STATE
,
"01"
and
"02"
appear in succession.
Note
The change from
"01"
to
"02"
takes approx.
2 min.
The water can be drained when
"02"
flashes.
0
6.
Place a shallow container of sufficient size (min.
5 l) below drain port
C
.
0
7.
Undo the screw and remove right-hand cover
B
for ventilation.
0
8.
Undo the screw in drain port
C
by approx. 1.5
turns.
0
9.
Press
SET
.
The display changes from
"02"
to
"03"
in
STATE
.
10.
When no more water runs out and
"04"
is flashing
in
STATE
, close apertures
B
and
C
again.
11.
Press
SET
.
"End"
and
"nP"
will appear alternately in
STATE
.
12.
Turn off the ON/OFF switch on the fuel cell mod-
ule.
Commissioning, inspection, maintenance
Checking the balanced flue system for tightness…
(cont.)
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Summary of Contents for E00T
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