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l
is
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1
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-HEAT
-COOL ON OFF
-1-
FAN -2-
-3-
s
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B
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10
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30
15
25
M
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xEMplaRy
c
onnEcTion
In this example,
IB-Therm 203
thermo-
stat controls the two-pipes fan coil. Fan coil
function (cooling or heating) is determined
in advance and the same operational mode
(heating or cooling) must be selected in the
thermostat.
In the heating mode:
when the thermostat is turned on and the
real temperature is lower than the desired
temperature, a valve is open (230V phase is
in the yellow wire) and fan works at chosen
speed.
when the thermostat is turned off or the real
temperature is higher than the desired tem-
perature, a valve is closed (230V phase is in
the red wire) and fan is turned off.
In the cooling mode:
when the thermostat is turned on and the
real temperature is higher than the desired
temperature, a valve is open ( phase is in the
yellow wire) and fan works at chosen speed.
when the thermostat is turned off or the real
temperature is lower than the desired tem-
perature, a valve is closed (phase is in the red
wire) and fan is turned off.
IB-Therm 203
room thermostat
230V ac mains
IB-Qxx valve
3-gear fan
Black
Yellow
red
Following picture shows the exemplary wiring of „230V” model:
