35
Maintenance info
The boiler is fitted with an anti-freeze system
which is automatically activated when the tem-
perature of the boiler water drops below 6°C:
the burner is automatically switched on and
the pump started until the temperature of the
water in the boiler reaches 16°C.
3.3
ANTI FROST
PROTECTION
B
C
WARNING!
This anti-freezing protection
does not work when the boiler
is disconnected from the
electrical supply and/or the gas
cock is closed.
This system protects the boiler and the even-
tual DHW tank from freezing, but it does not
protect the C.H. and sanitary circuits.
Moreover special anti-freeze products suita-
ble for the multimetal installations can effecti-
vely protect the heating system from the free-
ze.
Do not use the anti-freeze products for
car's engines because they can damage
the water sealing gaskets.
The anti-freeze protection system, which is
above described, can not work when, for any
reasons, there is no electricity or gas supply.
When the temperature detected by the heat-
ing sensor is under 2 °C, the boiler's operation
is automatically inhibited until the temperatu-
re raises again to 5 °C.
In case the display shows the wrenck symbol
and thr
Fr
info on the display, call the service
technician.
MAX
M
IN
MAX
MIN
°C
3.4
IMPORTANT
SUGGESTIONS
AND NOTES
The boiler must be serviced once a year by
qualified personnel.
Correct maintenance allows the boiler to work
optimally, respecting the environment and
without endangering people, animals and pro-
perty.
Only qualified and technical personnel can
make adjustment onto the gas valve.
Nobody, included qualified personnel, is
authorized to make modifications to the
boiler.
Check regularly the pressure of the boiler wa-
ter through the pressure gauge fitted onto the
panel board, and restore it, if necessary.
If some fault appears during the operation, the
boiler is automatically put in lockout position
and the red warning lamp (G) lights. In this
case proceed as follows:
- Ascertain that the gas cock is open and that
there is gas in the gas pipe (try to ignite a gas
cooker)
- If so, wait one minute before resetting the
boiler by depressing the L push button. If the
boiler does not start and goes into lockout
position after three times, (just once if is ope-
rated on LPG) ask for a service or for a
qualified technician.
If the boiler goes into lockout position
frequently, indication of a repeatetive fault in
the operation, ask for a service or for a
qualified technician
WARNING
In case of an open flue boiler (TN) the burner
lockout can be due to the intervention of the
smoke thermostat (antispillage thermostat). In
this case to restart the boiler it is necessary
to depress the reset push button L.
This fault, if repeated in the time, means a
bad chimney operation. Ask a qualified
technician for a check.
If the boiler remains inactive and disconnected
from the power supply for long periods it may
be necessary to unlock the pump.
This operation, for which it is necessary to
disassemble the outside casing and work on
the inside of the boiler, must be performed by
qualified personnel.
It is possible to prevent the pump from
blocking by adding special filming products
suitable for multi-metal systems to the water.
If the boiler is not disconnected from the mains
power supply the pump will not block becau-
se the boiler’s PCB has an anti-jamming pro-
gramme. In this case the pump goes into ope-
ration for a 5 seconds every 24 hour of inacti-
vity.
The boiler is equipped with a pressure gauge
which allows the control of the water pressure
in the heating system.
The pressure of the water must be around
0.8-1 bar when the C.H. system is cold.
If this value drops then use the filling cock to
adjust to the correct value.
WARNING
The anti-frost protection is ope-
rational only if the boiler is con-
WARNING
After adjusting the pressure, clo-
se the tap without over-tightening
it. If the tap is not closed properly the pressu-
re could rise, resulting in the safety valve ope-
ning and the water leaking.
nected to the mains supply and the gas cock
is open
Information for the user
The user can get access only to the parts
of the boiler which can be reached without
the need of tools.
It is therefore forbidden to disassemble the
outer casing of the boiler and tamper with
the internal parts.
