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.
!
Summary of Contents for RET 230 HCW-3
Page 52: ...52 GR fan coils 2 30 C 16 C 30 mm 100 mm...
Page 53: ...53 1 5 m PS1 BYPASS PS1 GR...
Page 54: ...54 fan coil 2 GR HEAT COOL FAN 230V L COM...
Page 55: ...55 GR DIL DIL...
Page 56: ...56 4 On Off Chrono 3 4 Chrono 20 10 2 1 GR DIL...
Page 57: ...57 GR 3 3...
Page 58: ...58 GR LED LED LCD LED 3 2 1 LCD RESET...
Page 83: ...83...
Page 84: ...www danfoss com BusinessAreas Heating Part No 39052v06s2 1 10 07...
