4.2
GAS VALVE
Each single module is mass produced
with gas valve model DUNGS GB-GD
057 (fig. 20).
4.3
CLEANING AND MAINTENANCE
Scheduled generator maintenance must be
performed annually by authorised techni-
cians.
During maintenance operations the
authorised technician must check that
the syphened drip is full of water (this
check is of importance particularly when
the generator has been out of use for a
long period of time). Filling is done via the
special opening (fig. 21).
4.3. 1
Chimney sweep function
To check single module combustion, rotate
the selector to position ( ) until the yellow
led (
) starts to blink (fig. 22).
At this time the module will start to heat at
maximum power and turn off at 80°C,
restarting at 70°C.
Before starting the chimney sweep func-
tion, make sure the radiator valves or any
other area valves are open.
After checking combustion, turn off the
module by rotating the selector to (OFF);
return the selector to the required func-
tion.
WARNING: After about 15 minutes the
chimney sweep function automatically
turns off.
5
1
SPIA GIALLA INTERMITTENTE
BLINKING YELLOW LIGHT
6
KEY
1
Upstream pressure fixture
5
Shutter
6
OFF-SET
IT
ES
GB
Fig. 20
Fig. 21
Fig. 22
75