29
Maintenance instructions
ENGLISH
ROUTINE YEARLY VERIFICATION OPERATIONS
COMPONENT: VERIFY: CONTROL/INTERVENTION
METHOD:
FL
(domestic hot water
priority ow switch ( 2 )
Is the minimum domestic hot water
ow rate 3 l/min.?
The burner must ignite with an
intake above or equal to: 3 l/min.
VG
(Gas valve) ( 3 )
Does the valve modulate properly? Open a hot water tap at maximum
flow rate and then at minimum.
Make sure that the ame modu-
lates.
SR (heating sensor) ( 11 )
SS (domestic hot water sensor)
( 1 )
Do the sensors maintain the origi-
nal characteristics?
12571 ohm at 20° C / 1762 ohm
at 70° C.
Measurement to be taken with the
wires disconnected (see table Res/
Temp).
E ACC/RIV. (ignition/detection
electrode) ( 4 )
Does the discharge of sparks be-
fore
putting the boiler in safe conditions
last less than 10 sec.?
Detach the electrode ionisation
wire and check the securing time.
TL (anti-overheating
limit thermostat) ( 10 )
Does the TL put the boiler in safety
conditions when overheating?
Heat the TL until it intervenes at
95°C and check that it intervenes
at 95°.
DK (safety pressure switch
against water deciency) ( 13 )
Does the pressure switch block the
boiler if the water pressure is below
0.4 bar?
Without request: close the shut-off
valves of the heating circuit, open
the drain valve to make the water
pressure decrease. Before pres-
surising again, check the pressure
of the expansion vessel.
Expansion vessel ( 8 ) Does the vessel contain the right
amount of air?
Check the pressure (1 bar when
the boiler is empty). Pressurise the
boiler (open the pump automatic
vent valve). Open the heating cir-
cuit closing valves.
Domestic hot water ow rate Filter in cold water inlet ( 2 ) Clean the lter with limescale re-
mover.
Heat exchanger body ( 9 ) Check that the space between the
rungs of the exchanger are not
clogged
Eliminate the deposits without
damaging the exchanger, using a
soft bristle brush and specic, non
ammable detergents.
Burner ( 5 ) Check the state of cleanliness of
the burner mesh
Remove deposits using a soft bris-
tle brush and blow on each single
ramp from the outside and from
the venturi.
( Num ) = see key Par. 2.2
To Next Page
Loading...
Need help?
General