2.7.3 Gradient of the characteristic
heating curve
The.gradient.of.the.characteristic.heating.
curve. is. imposed. on. the. current. value.
“15”
. of. Logica.. Increasing. the. gradient.
as. shown. in. the. drawing. of. fig.. 8,. the.
delivery.temperature.increases.in.corre-
spondence.to.the.outside.temperature.
ExAMPLE:.Choosing.a.gradient.of.15.with.
an.outside.temperature.of.–10°C.we.shall.
have.a.delivery.temperature.of.60°C.
2.8
EXTERNAL TEMPERATURE
SENSOR
The. “Logica. Remote. Control”. can. be.
connected. to. an. external. temperature.
sensor.available.a.an.optional.extra.(code.
8094100)..This.configuration.ensures.and.
maintains.the.required.temperature.con-
stant..in.the.room..
The. ambient. temperature. is,. in. fact,.
indicted.and.evaluated.as.the.calculated.
mean.of.the.value.measured.inside.and.
outside.the.dwelling..
For. installation,. follow. the. assembly.
instructions.inserted.in.the.package.
100
Entrance function terminal 3-4
The. freely. programmable. input. (terminals. 3. and. 4. of. the. socket).
allows.three.different.functions.to.be.activated..The.parameter.has.
the.following.significance:
1
.=. If.an.external.sensor.is.connected,.the.display.will.show.the.tempe-
rature.of.the.external.sensor.(._._.=.no.sensor.connected,.function.
disabled).
2
.=. With.an.external.contact,.it.is.possible.to.switch-over.to.“reduced.
pre-set.value.of.the.ambient.temperature”.
3
.=. With.an.external.contact,.it.is.possible.to.switch-over.to.“reduced.
pre-set.value.of.the.antifreeze.ambient.temperature”.(short.circuit.
0.0.0.or.interruption._._._.)..The.display.shows.the.current.status.of.
the.external.contact.
64
Operating mode of external contact
External and ambient
sensor influence
Anti-bacterial function
If.the.entrance.(terminals.3.and.4.of.the.base).is.connected.to.a.zero.potential.
external.contact.(parameter.64.=.2.or.3),.the.operating.mode.of.the.contact.can.
be.determined.(remote.telephone.switch.or.window.contact)..The.operating.mode.
specifies.the.status.of.the.contact.in.which.the.required.function.is.active.
Display:. Operating.mode.closed.(short.circuit).
0.0.0
.
Operating.mode.open.(interruption).
_._._
Determines. the. mix. ratio. between. the. internal. and. external. ambient. sensor.
when.parameter.64.=.1.
0 %
..
=.internal.sensor.only.active.(0%.external.-.100%.internal)
50 %
=.mean.value.of.ex.internal.sensor
100 %
.. =.external.sensor.only.active
The.set.mix.is.used.for.ambient.control.and.display..
If.the.external.sensor.is.short.circuited.or.interrupted,.the.operation.continues.
with.the.internal.sensor.
This.function.allows.the.hot.water.to.be.brought.to.a.high.temperature.once.a.
week.in.order.to.eliminate.eventual.pathogenic.agents.
It.is.active.every.Monday.for.a.maximum.duration.of.2.5.hours.at.a.delivery.tem-
perature.of.65°C.
0 = not active 1 = active
65
66
69
Fig..8
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