Connection Without Supply Air Unit (Standard Connection); Connection With Supply Air Units; Minimum Circulation Flow - ComfortZone RX35 User And Installation Manual

ComfortZone RX35/RX50/RX65

5.10 Connection without supply air unit (standard connection)

If supply air unit is not used, please leave <air handling unit> untouched.

5.11 Connection with supply air units

The RX35 / RX50 / RX65 has a separate connection for air supply units to ensure
circulation regardless of the gear valve position.
The air supply unit must be equipped with a thermostatic valve controlled by the
supply air temperature. The set air temperature must never exceed 20° C.
When ComfortZone's air supply unit T12 is installed together with the
ComfortZone exhaust air heat pumps RX35 / RX50 / RX65, this is installed
according to the enclosed installation manual.
Air supply units T12 are controlled via the control unit in ComfortZone's exhaust
air heat pump.
The air supply unit is connected with 15 mm pipes. The return line is connected to
the pipe marked <circ return>.

5.12 Minimum circulation flow

The heat pump's circulation water flow must be at least 6 l / min
(RX35), 8 l / min (RX50) and 10 l / min (RX65) at maximum heat
output.
A minimum flow of 3 l / min must always be ensured.
If it is not possible to ensure the circulation water flow as
described above, an overflow valve or pressure-controlled bypass
must be mounted on the circulation water circuit, which opens
when the pressure drop across the circulation water circuit
becomes too large. The user then has the possibility to regulate
the heat with thermostats without risking too much restriction of
the flow.
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service & maintenance