54
COMMISSIONING AND MAINTENANCE
3.5
Temporary or short-term shut-down
In the event of temporary or short-term shut-down (e.g. due to
holidays), proceed as follows:
− Remove the power supply by setting the main switch
of the equipment and the main switch of the system to
"OFF".
− If there is a danger of frost, keep the system on. To reduce
fuel consumption, set the heating set point to the mini-
mum allowed value.
3.6
Preparing for extended periods of disuse
If the appliance is not going to be used for a long period of time,
the following operations should be carried out:
set the main switch of the system to OFF and the main switch of
the equipment to (0);
− close the fuel cock and heating circuit water cock.
9
Drain the central heating circuit if there is any risk of freez-
ing.
3.7
Device cleaning and maintenance
It is essential to clean the boiler and remove carbon deposits
from the surfaces of the heat exchanger in order to keep the
boiler efficient and economical.
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All cleaning operations MUST be performed under the fol-
lowing conditions:
− boiler cold
− boiler switched OFF
− Suitable personal protection equipment
Perform the following operations before beginning any mainte-
nance or cleaning:
− set the main switch of the system to OFF and the main
switch of the equipment to (0);
− close all external fuel shut-off cocks.
3.8
Annual cleaning
It is mandatory to perform maintenance and cleaning of the de-
vice at least once a year.
This operation, carried out by Technical Assistance Service or by
professionally qualified personnel, is necessary to monitor and
ensure that the flue pipes inside and outside of the device, the
fan, the safety valves, the condensate removal devices, the wa-
ter drainage tubes and all the measurement and control devices
are in perfect working order.
3.8.1
Cleaning and maintaining the burner
Proceed as follows to access the internal parts of the boiler:
− remove the fixing screw (2) and extract the front panel (1);
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