Sime AQUA 25 ErP LN Instrucciones Para El Instalador página 84

4.7.3 Substitution of nozzle
The. nozzle. should. be. substituted. at.
the.beginning.of.every.heating.system.
for.guaranteeing.the.correct.fuel.flow.
and.a.good.spray.efficiency..
The.nozzle.is.substituted.in.the.follow-
ing.manner:
–. Disconnect. the. high. tension. cables.
from.the.electrodes.
–. Loosen. the. fixture. screw. (A. fig..
16). of. the. electrodes. support. and.
remove.it.
–. Block. the. spray. door. using. a. n°19.
spanner. and. unscrew. the. nozzle.
with.a.n°16.spanner.(fig..17).
4.8 FAULT FINDING.
There. follow. a. list. of. some. reasons.
and.the.possible.remedies.for.a.series.
of. faults. which. could. happen. causing.
a.failure.or.an.irregular.function.of.the.
appliance..
A.function.fault,.in.most.cases,.caus-
es. the. "lock. out". signal. on. the. con-
trol. panel. to. turn. on.. When. this. light.
turns.on,.the.burner.can.only.function.
again.after.the.reset.button.has.been.
pressed;.once.this.has.been.done.and.
a. regular. ignition. occurs,. the. failure.
can. be. defined. momentary. and. not.
dangerous..
On.the.contrary,.if.the."lock.out".per-
sists,. then. the. cause. of. the. fault. as.
well.as.the.remedy.must.be.looked.for.
in.the.following.faults:
The burner does not ignite
–. Check.the.electric.connections.
–. Check. the. regular. fuel. flow,. the.
cleanness.of.the.filters,.of.the.noz-
zle.and.air.vent.from.the.tube.
–. Check. the. regular. spark. ignition.
and.the.proper.function.of.the.burn-
er.
The burner ignites regularly but the
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flame goes out immediately
–. Check. the. flame. detection,. the. air.
calibration. and. the. function. of. the.
appliance..
Difficulty in regulating the burner
and/or lack of yield
–. Check:.the.regular.flow.of.fuel,.the.
cleanness. of. the. boiler,. the. non.
obstruction. of. the. smoke. duct,. the.
real. input. supplied. by. the. burner.
and.its.cleanness.(dust)..
The boiler gets dirty easily
–. Check.the.burner.regulator.(smoke.
analysis),.the.fuel.quantity,.the.flue.
obstruction.and.the.cleanness.of.the.
air.duct.of.the.burner.(dust).
The boiler does not heat up
–. Control. the. cleanness. of. the. shell,.
the. matching,. the. adjustment,. the.
burner. performances,. the. pre-
adjusted. temperature,. the. correct.
function.and.position.of.the.regula-
tion.stat.
–. Make. sure. that. the. boiler. is. suf-
ficiently.powerful.for.the.appliance.
Smell of unburnt products
–. Control. the. cleanness. of. the. boiler.
Fig..17
shell. and. the. flue,. the. airtightness.
of. the. boiler. and. of. the. flue. ducts.
(door,.combustion.chamber,.smoke.
ducts,.flue,.washers).
–. Control.the.quality.of.the.fuel.
Frequent intervention of the boiler
shutoff valve
–. Control. the. presence. of. air. in. the.
system,.the.function.of.the.circula-
tion.pumps.
–. Check. the. load. pressure. of. the.
appliance,. the. efficiency. of. the.
expansion.tanks.and.the.valve.cali-
bration.