Sime MURELLE 25 OF ErP Manual De Instrucciones página 81

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3.4 
EXTERNAL 
SENSOR
(fig. 15)
If. there. is. an. external. sensor,. the. heating.
settings.SET.can.be.taken.from.the.climatic.
curves.according.to.the.external.temperatu-
re.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.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.
–. Management.of.two.independent.heating.
circuit.systems.
–. Automatic.regulation.of.the.ignition.power.
and.maximum.heating...Adjustments.are.
managed.automatically.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,.
connected. to. a. management. card. of. a.
mixed.zone.ZONA.MIX.code.8092234.and.
card.solar.INSOL.code.8092235...
. 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. (
). obtained. on. the. heating. and.
Ω
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  (SS)  interrupted, 
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. 
the  boiler  functions  but  will  not  made  the 
power modulations for the D.H.W.
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.dischar-
ging. 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.stron-
gly.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.automatically.
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.
(6.fig..3)..
It. reacts. by. blocking. the. functioning. of. the.
ES
PT
ENG
Fig..15
81
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