Danfoss RET 230 HCW-1, Installation Instructions Manual

Page: 4 / 84

4
GB - Installation Instructions
Product overview
The thermostat is designed for use in systems equipped
with fan coils served by a 2-pipe central changeover system.
The thermostat controls the operation of a motorized valve
which, during heating periods, opens when heat is required
and which, during cooling periods, opens when cooling is
required.
The changeover from heating to cooling is achieved
automatically by measuring the temperature of the
fl ow
pipe. If the fl ow temperature exceeds 30°C the thermostat
operates as a heating thermostat, if the fl ow temperature
is less than 16°C the thermostat operates as a cooling
thermostat
Important note: It is essential that the circuit in which
the pipe sensor is located is not closed off and that water
circulates past the sensor at all times. This may require
the
fi tting of a bypass valve between system fl ow and
return at the end of each circuit.
Installation
First remove the wallplate from the back of the unit.
Ensure that there is a minimum of 50mm above the
unit and 100mm below the unit in order to mount the
plug-in module.
!