92
3.4
EXTERNAL
SENSOR (fig. 13)
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..13.will.increase.the.output.temperatu-
re.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.
D.H.W..storage.tank.
–. 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. hea-
ting.circuit.systems.
–. Automatic. regulation. of. the. igni-
tion. power. and. maximum. heating...
Adjustments. are. managed. automati-
cally. by. the. electronic. card. to. guaran-
tee. 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 para-
meter 10 to 2 and 3 (PAR 10 = 2 or 3).
3.6
TEMPERATURE
DETECTION SENSOR
Table 4. gives. the. values. of. the. electri-
cal. element. (
Ω
). obtained. on. the. heating,.
D.H.W..and.exhaust.fumes.sensors.accor-
ding.to.the.variations.in.temperature.
.
When the heating sensor (SM) and fumes
sensor (SF) is interrupted, the boiler will
not function for both services.
With D.H.W. sensor (SB) interrupted the
boiler, in modality “winter”, works alone
in C.H., modality “summer” works alone
in D.H.W.
3.7
ELECTRONIC
IGNITION
Ignition. and. flame. detection. is. controlled.
by.a.single.electrode.on.the.burner.which.
guarantees. reaction. in. the. case. of. acci-
dental.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.
inactivity. 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.elec-
trode.wire.or.if.it.is.incorrectly.anchored.
to.the.connection.points..Or.the.electro-
de.may.be.earthed.or.strongly.worn:.it.
must.be.replaced..
. Or.the.electronic.card.may.be.defective.
–. No flame detected
.
After.start-up.the.electrode.continues.to.
discharge. even. when. the. burner. is. on..
After. 10. seconds,. the. discharge. stops,.
the.burner.is.switched.off.and.a.fault.is.
generated.
. This. fault. is. sometimes. caused. by. the.
shorting.of.the.electrode.cable.or.by.its.
improper.fixing.to.the.connection.points..
The.electrode.is.connected.to.the.earth.
or. badly. worn. and. must. be. replaced..
The.electronic.board.is.faulty.
In.the.case.of.a.sudden.lack.of.voltage,.the.
burner. will. immediately. switch. off.. When.
voltage. returns,. the. boiler. will. automati-
cally.start.up.again.
TABLE 4
. 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..13
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.
