Temperature sensors
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The number of sensors required can vary with
the type of system.
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In the indoor module (F11), the collector
sensor, the return sensor (F17) and the sensor
for the liquid line (TH2-Refrigeration circuit) are
already installed and connected.
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Observe the pertinent notes for the sensor
position found in the hydraulic schematic.
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The standard model includes an external
sensor (F9), a submersible sensor (intended
for use as a custom hot-water sensor - F6), as
well as a sensor for a. total supply (T-Collector-
F8).
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When connecting solar panels, the PT-1000
sensor must be used to measuring the col-
lector temperature! (F14) All other sensors
must be NTC-sensors with a reference resist-
ance of 5 kilo Ohms by 25 °C.
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All sensors are to be connected to the indoor-
module switching-cabinet according to the ter-
minal-assignment diagram.
Contact sensor
Contact sensors can be mounted on the pipes, to
measure the heating-circuit temperatures, for
example.
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The contact sensor is fastened to a pipe with
the trapezoidal brackets and retaining strap
provided.
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Clean the mounting point on the pipe. Subse-
quently a thermal compound (A) is applied and
the sensor is fixed in position.
Fig. 52: Fixation of the contact sensor
If the sensor cables are too short, they can be
extended up to a maximum of 100m with wire
having a cross-section of 1.5 mm².
External sensor
The connection of an outdoor sensor is always
required for the heat pump manager.
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Mount the outdoor sensor pointing skyward, in
a north-easterly direction, about 2.5 metres
above the ground. It may not be subjected to
direct sunlight and is to be protected against
excessive wind. Installation above windows or
air ducts is to be avoided.
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In order to carry out the installation, remove the
cover and secure the sensor with the screws
provided.
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A cable with wire cross-sections of 0.5 mm² is
recommended for connecting the sensor.
Fig. 53: External sensor
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