106
of.the.burner.it.is.recommended.that.
attention. be. paid. to. the. starting. and.
detection.electrodes..Reassemble.the.
parts.removed.from.the.boiler,.obser-
ving.the.succession.of.the.phases.
–. Check. the. chimney. making. sure. that.
the.smoke.stack.is.clean.
–. Check.the.functioning.of.the.main.bur-
ner.
–. After.the.assembly.all.the.gas.connec-
tions. must. be. checked. for. the. seal,.
using.soapy.water.or.specific.products,.
avoiding.the.use.of.naked.flames.
The maintenance or the boiler program-
med is carried out annually .
4.7.1 Disassembly the control panel
and skirt cover lid
(fig..19)
To. remove. the. cover,. take. out. the.
screws. (1. –. 2). that. hold. it. in. place. on.
the.instrument.panel..Position.side
“A”
.
of.the.bracket.on.the.skirt.side.so.that.
the.instrument.panel.is.hooked.on.the.
side. in. order. to. facilitate. this. opera-
tion..
4.7.2
Chimney sweep function
To. carry. out. the. verification. of. combu-
stion.in.the.boiler.turn.the.selector.and.
the.stop.on.the.position.( ).until.the.yel-
low.led.(
).starts.to.flash.(fig..20)..
From. that. moment. the. boiler. will. start.
functioning.in.heating.mode.at.the.maxi-
mum.power,.with.switching.off.at.80.°C.
and.restarting.at.70.°C.
Before activating the chimney sweep
function make sure that the radiator
valves or eventual zone valves are
open.
The.test.may.be.carried.out.also.during.
hot-water. service. functioning,. when. the.
boiler.part.is.connected..
To.do.so.it.is.enough,.after.having.activa-
ted.the.chimney.sweep.function,.to.take.
some.hot.water.from.one.or.more.taps;.
after. a. few. minutes. the. request. of. the.
D.H.W..sensor. is. activated. dan. it. auto-
matically.commutes.on.the.led.(
)..
Even.in.this.condition.the.boiler.functions.
at.the.maximum.temperature.always.with.
the. primary. circuit. controlled. between.
80.°C.and.70.°C..
During.the.entire.duration.of.the.testing.
the.hot.water.taps.must.remain.open.
After.verifying.the.combustion.the.boiler.
should. be. switched. off. by. placing. the.
selector.on.the.
OFF
.position;.then.return.
the.selector.to.the.desired.function.
ATTENTION: After about 15 minutes the
chimney sweep function automatically
deactivates.
4.8
FAULT FINDING
The principal burner burns badly: fla-
mes too high, yellow flames.
–. Check. that. the. gas. pressure. to. the.
burner.is.normal.
–. Check.that.the.burners.are.clean.
The radiators heat up also in summer.
–. Check.that.there.are.no.impurities.on.
the.seat.of.the.non-return.valve.
–. The. non-return. valve. is. faulty,. see. to.
its.replacement.
–. Assemble. a. non-return. valve. on. the.
plant.return.tubing.
The safety valve of the boiler frequently
intercepts.
–. Check.that.the.cold.filling.pressure.is.
not.too.high,.keep.to.the.given.values..
–. Check.that.the.safety.valve.is.calibra-
ted,.eventually.replace.it.
–. Check.the.pre-inflation.pressure.of.the.
expansion.tank.
–. Replace.the.expansion.tank.
The boiler functions but the temperatu-
re does not increase.
–. Check.that.the.consumption.of.gas.is.
not.below.that.foreseen.
–. Check.that.the.boiler.is.clean.
–. Check.that.the.boiler.is.proportional.to.
the.plant.
Abnormal burner flame (fig. 17).
–. Check.the.chimney.flue.draught..
–. Check.that.the.nozzle.is.centred.in.the.
burner.
–. Clean.the.cast.iron.exchanger.and.the.
burner..
Fig..18
Lato A
Lato A
1
2
Fig..19
Lato A
Lato A
1
2
SPIA VERDE
SPIA GIALLA
SPIA ROSSA
SPIA GIALLA INTERMITTENTE
SPIA ROSSA
R E M O T E
SPIA ROSSA INTERMITTENTE
SPIA ROSSA INTERMITTENTE
SPIA ROSSA INTERMITTENTE
IN CONDIZIONE DI SICUREZZA
SPIA VERDE IN CONDIZIONE
DI FUNZIONAMENTO
R E M O T E
SPIA ROSSA INTERMITTENTE
Fig..20
FLASHING.YELLOW.LED
