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3.4
EXTERNAL SENSOR
(fig. 15)
If. there. is. an. external. sensor,. the. hea-
ting. settings. SET. can. be. taken. from. the.
climatic. curves. according. to. the. external.
temperature. and,. in. any. case,. limited. to.
with.the.range.values.described.in.point.3.3.
(parameters.PAR.25.for.zone.1.and.PAR.26.
for.zone.2).
The.climatic.curve.to.be.set.can.be.selected.
from.a.value.of.3.and.40.(at.step.1).
Increasing. the. steepness. of. the. curves. of.
fig..15.will.increase.the.output.temperature.
as.the.external.temperature.decreases.
3.5
CARD FUNCTIONING
The. electronic. card. has. the. following. fun-
ctions:
–. Antifreeze. protection. of. the. heating. and.
sanitary.water.circuits.(ICE).
–. Ignition.and.flame.detection.system.
–. Control.panel.setting.for.the.power.and.
the.gas.for.boiler.functioning.
–. Anti-block.for.the.pump.which.is.fed.for.
a.few.seconds.after.24.hours.of.inactivi-
ty.
–. Antifreeze.protection.for.boilers.with.an.
accumulation.boiling.unit.
–. Chimney. sweep. function. which. can. be.
activated.from.the.control.panel.
–. Temperature. which. can. be. shifted. with.
the.external.sensor.connected..
. It.can.be.set.from.the.control.panel.and.
is.active.on.the.heating.systems.of.both.
circuit.1.and.circuit.2.
–. Management.of.two.independent.heating.
circuit.systems.
–. Automatic. regulation. of. the. igni-
tion. power. and. maximum. heating.. .
Adjustments. are. managed. automatical-
ly. by. the. electronic. card. to. guarantee.
maximum.flexibility.in.use.of.the.system.
–. Interface. with. the. following. electronic.
systems:. remote. control. SIME.HOME.
code.8092280/81,.thermal.regulator.RVS.
and.connected.to.a.management.card.of.
a.mixed.zone.ZONA.MIX.code.8092234..
. NOTE: If using CR 53 or RVS set parame-
ter 10 to 2 or 3 (PAR 10 = 2 or 3).
–. Function.anticondensig,.preheat.the.body.
("+".sign.in.front.of.the.main.digits).and.
anti.inertia.
3.6
TEMPERATURE
DETECTION SENSOR
Table 3. gives. the. values. of. the. electrical.
element. (
Ω
). obtained. on. the. heating. and.
sanitary. water. sensors. according. to. the.
variations.in.temperature..
When the heating sensor (SM) is interrup-
ted, the boiler will not function for both
services.
With the D.H.W. sensor (SB) interrupted,
the boiler, in modality "winter", functions
ATTENTION: curves are calculated at an ambient temperature
of 20°C. The user can act on the boiler controls to change the
environment set for which the bend has been calculated by ±5°C.
only in phase C.H., modality "summer",
functions only in D.H.W. phase.
TABLE 3
. Temperature.(°C).
Resistance.(Ω)
.
20.
12.090
.
30.
8.313
.
40.
5.828
.
50.
4.161
.
60.
3.021
.
70.
2.229
.
80.
1.669
3.7
ELECTRONIC IGNITION
Ignition.and.flame.detection.is.controlled.by.
a.single.electrode.on.the.burner.which.gua-
rantees. reaction. in. the. case. of. accidental.
extinction.or.lack.of.gas.within.one.second.
3.7.1
Functioning cycle
Burner. ignition. occurs. within. max.. 10.
seconds.after.the.opening.of.the.gas.valve..
Ignition. failure. with. consequent. activation.
of.block.can.be.due.to:
–. Lack of gas
The. ignition. electrode. persists. in.
discharging. for. max.. 10. seconds.. If. the.
burner. does. not. ignite,. the. anomaly. is.
signalled.
. This.can.happen.the.first.time.the.boiler.
is.switched.on.after.a.long.period.of.inac-
tivity.due.to.the.presence.of.air.in.the.gas.
pipes.
..
It.can.be.caused.by.a.closed.gas.tap.or.by.
a.broken.valve.coil.(the.interruption.does.
not.allow.for.opening)..
–. The electrode does not discharge.
. In.the.boiler,.only.the.opening.of.the.gas.
to. the. burner. can. be. detected.. After. 10.
seconds.the.anomaly.is.signalled.
.. It. can. be. caused. by. an. interruption. in.
the. electrode. wire. or. if. it. is. incorrectly.
anchored.to.the.connection.points..
. Or. the. electrode. may. be. earthed. or.
strongly.worn:.it.must.be.replaced..
. Or.the.electronic.card.may.be.defective.
In.the.case.of.a.sudden.lack.of.voltage,.the.
burner. will. immediately. switch. off.. When.
voltage.returns,.the.boiler.will.automatical-
ly.start.up.again.
3.8
FUMES THERMOSTAT
This.is.a.safety.measure.against.the.return.
of.the.fumes.into.the.environment.due.to.an.
inefficient.or.partially.blocked.chimney.(11.
fig..3)..It.reacts.by.blocking.the.functioning.
of. the. gas. valve. when. the. fumes. are. con-
tinually. forced. back. into. the. environment,.
in. a. quantity. that. can. be. dangerous.. If. the.
boiler.repeatedly.stops,.it.will.be.necessary.
to.carefully.check.the.chimney,.and.to.carry.
out.all.modifications.and.take.all.measures.
necessary.to.restore.it.to.an.efficient.wor-
king. state.. After. every. intervention. carried.
outon.the.device,.check.correct.functioning..
In.the.case.of.replacement,.use.only.origi-
nal.spare.parts.
PT
ENG
Fig..15
81
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