Maintenance
Installation, use and maintenance manual – G gas unit heater
43
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long period of time, disconnect it from the electrical and
gas mains.
How to deactivate the appliance for long pe-
riods of time
1.
Switch the appliance off (Paragraph 6.2
p. 28).
2.
Only when the appliance is completely off, power it off
with the main switch/disconnector switch (Detail GS in
Figure 4.1
3.
Close the gas valve.
The chronothermostat has a 12 hours buffer bat-
tery. If the gas unit heater is not electrically pow-
ered, after 12 hours, the time and day settings will
be lost (the temperature and profile settings will
remain however in memory). To avoid this, it is nec-
essary to leave the generator electrically powered
even during prolonged periods of inactivity.
How to reactivate the appliance after long pe-
riods of inactivity
Before reactivating the appliance, the operator/
maintenance technician of the system must first of
all:
Check whether any maintenance operations are re-
quired (contact the TAC; see Paragraph 7.2
p. 42).
Ensure that the flue gas exhaust duct and the air
intake are not obstructed.
After completing the above checks:
1.
Open the gas valve and ensure there are no leaks;
should gas smell be noticed, close the gas valve
again, do not switch any electrical devices on and
request intervention by qualified personnel.
2.
Power on with the main power supply switch (GS,
Figure 4.1
3.
Switch on the appliance by means of the provided
control device (Paragraph 6.2
