Immergas ARES PRO 150 Instructions And Recommendations page 38

Inspections and maintenance
ANNUAL ROUTINE CHECKS
COMPONENT:
VG
(Gas valve ( 3 )
SM (flow sensor) ( 11 )
E ACC (ignition electrode ( 28 )
TL (Overheating limit thermostat) ( 10 ) (51) Does the TL make the boiler safe in case of
Condensate drain trap (27)
Heat exchanger body
Burner ( 5 )
( Num ) = see key Par. 2.1
• POSITIONING AND REASSEMBLING THE BURNER
ATTENTION:
After completing maintenance, it is imperative to
assemble the burner correctly.
A - Insert gasket 1
B - Direct burner 2 as shown in the drawing (the arrow engraved on
the door must be in line with the burner's fins).
C - Insert gasket 3
CHECK:
Does the valve modulate correctly?
Do the sensors maintain their original fea-
tures?
The sparks generated before being secured is
less than 3 secs?
overheating?
Was the drain trap deposited at the bottom?
If SL makes the boiler safe in case of an increase
in the level of condensate
If PF makes the boiler safe in case of a clogged
flue exhaust
Make sure the burner's mesh is clean
38
CONTROL METHOD/
INTERVENTION:
The check is carried out in "Calibration" mode,
requesting 100%, in 50%, the minimum mod-
ulation percentage.
Check that the flame modulates.
12571 ohm at 20° C / 1762 ohm at 70° C.
Measurement to be carried out with the wires
disconnected (see Res/Temp table).
Disconnect the wire from the ionization elec-
trode and check the time required to make it safe.
Heat the TL until it intervenes at 102°C and
check that it intervenes at 102°.
Clean the drain trap with water.
Check/remove any deposits from the com-
bustion chamber using a vacuum cleaner.
Then wash the heat exchanger body with
water and check correct draining from the flue
chamber and drain trap / remove any flue side
obstructions.
Remove any deposits using compressed air
blown from the mesh side