INST
ALLA
TION
MANUAL
24
6 MAINTENANCE
To maintain maximum functionality and effi-
ciency, and to comply with applicable leg-
islation, have the boiler serviced at regular
intervals.
The frequency at which servicing should
be performed depends on installation and
operating conditions. The boiler should never-
theless be inspected by specialist personnel
from the manufacturer’s Technical Assistance
Service at least once a year.
Always switch the boiler off if any work or
servicing has to be done on other equipment
installed near the flue gas vent pipes and/or
flues and associated accessories. On com-
pletion of work, have the efficiency of the flue
checked by qualified personnel.
b
Switch the boiler off at its control panel
and at the mains power switch, and
turn the gas supply off by closing the
gas shut-off cock before performing any
cleaning or maintenance on the boiler.
6.1
Scheduled maintenance
Scheduled maintenance normally consists of
the following operations:
- Remove encrustations from the burner.
- Remove encrustations from the heat
exchangers.
- Check and clean the flue pipes.
- Check the efficiency of the external casing.
- Check the ignition, normal functioning and
shutdown of the boiler in DHW and CH
modes.
- Check the tightness of the gas and water
pipe joints.
- Check gas consumption at maximum and
minimum power.
- Check the position of the ignition electrode
and flame detection sensor.
- Check the gas failure safety system.
Do not use
flammable substances (e.g. pet-
rol, alcohol etc.) to clean the boiler or any of
its parts.
Do not use
paint thinners to clean the casing
or any painted or plastic parts of the boiler.
Use only soapy water to clean the boiler
casing.
6.2
Extraordinary maintenance
Extraordinary maintenance involves actions
designed to restore the functioning of the boil-
er to its design specifications and to ensure
conformity to legal requirements after a failure
or malfunction.
These actions can be:
- Replacement of parts
- Repairs
- Reconditioning of parts.
These actions generally require special tools
and equipment.
