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Operation as a Heating Control
(Fig. left)
The remote control (TF) is composed of a temperature sensor
and atemperature selector. (If desired also two separated devices
can be used.)
n
The temperature sensor measures the actual room temperature.
n
The desired value for the room temperature is to be set on
the temperature selector.
On the basis of both of these values the control unit calculates the
necessary water temperature (flow temperature). It is measured by
the flow sensor (VF). If the flow temperature differs from the set
value, the control unit adjusts themixing valve (ZR) with the ser -
vomotor (VM) so that the right heat input is provided to the radi-
ators.
The mixing valve determines the flow temperature by mixing the
hot water from the boiler with the colder return water.
The heating circuit pump (P) provides for the circulation of the
hot water. It is not operated by the control unit.
The temperature selector (TF) is used as a remote control, e.g. if
the control unit is mounted in the cellar: by means of the selector
knob P2 the room temperature can be changed. With the party
switch S1 the night economy option can be suspended.
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