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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.22.for.zone.1,.PAR.
25.for.zone.2.and.PAR.28.for.zone.3)..
The.climatic.curve.to.be.set.can.be.selec-
ted.from.a.value.of.3.and.40.(at.step.1)..
Increasing. the. steepness. of. the. curves.
of. fig.. 13. will. increase. the. output. tem-
perature. as. the. external. temperature.
decreases.
3.5
CARD FUNCTIONING
The. electronic. card. has. the. following.
functions:
–. 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.
inactivity.
–. 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.and.3.
–. Management. of. 3. independent. hea-
ting.circuit.systems.
–. Automatic. regulation. of. the. ignition.
power.and.maximum.heating...
. Adjustments. are. managed. automa-
tically.by.the.electronic.card.to.gua-
rantee.maximum.flexibility.in.use.of.
the.system.
–. Interface. with. the. following. elec-
tronic. systems:. climatic. regulator.
CR. 53,. remote. control. CR. 73,. ther-
mal. regulator. RVS,. connected. to. a.
management. card. of. a. mixed. zone.
ZONA.MIX. code. 8092234,. card. solar.
INSOL. code. 8092235. and. to. board.
RS-485. for. managing. up. to. 8. boilers.
in. cascade. or. implement. a. communi-
cation.type.Modbus.(slave.RTU-RS485,.
Reference.Guide.PI-MBUS-300.Rev..J).
code.8092243..
NOTE: If using CR 53 set parameter
10 to 2 (PAR 10 = 2).
3.6
TEMPERATURE
DETECTION SENSOR
Table 4 shows. the. resistance. values. of.
the. heating,. DHW. and. exhaust. fumes.
thermistors..
If the C.H. flow sensor (SM), C.H. return
sensor (SR) and the exhaust fumes sen-
sor (SF) is faulty or open circuit, the
ATTENTION: curves are calculated at an ambient temperature of
20°C. The user can act on the boiler controls to change the envi-
ronment set for which the bend has been calculated by ±5°C.
boiler will not function.
TABLE 4 (SM - SR - SF sensors)
. 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.control-
led.by.a.single.electrode.on.the.burner.
which.guarantees.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.ano-
maly.is.signalled.
. This. can. happen. the. first. time. the.
boiler. is. switched. on. after. a. long.
period. of. inactivity. due. to. the. pre-
sence.of.air.in.the.gas.pipes
..
It.can.be.caused.by.a.closed.gas.tap.
or. by. a. broken. valve. coil. (the. inter-
ruption.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.defec-
tive.
–. No flame detected
.
After. start-up. the. electrode. conti-
nues. to. discharge. even. when. the.
burner. is. on.. After. 10. seconds,.
the. discharge. stops,. the. burner. is.
switched. off. and. a. fault. is. genera-
ted.
. This.fault.is.sometimes.caused.by.the.
ES
ENG
Fig..13
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