Sime Murelle 25/55 OF ErP, Installer'S Instructions

Page: 81 / 96

81
PT
ENG
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
only in phase C.H., modality “summer”,
functions only in D.H.W. phase.
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.
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
Fig..15
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.