Sensor Placement; Control Sensor; Evaporator Sensor - Danfoss ERC 112 User Manual

User Guide | ERC 112 Refrigeration Controller

Sensor placement

Control sensor

Control sensor

Evaporator sensor

© Danfoss | DCS (vt) | 2019.07
The control sensor must always be connected and is
used for controlling the cut-in and cut-out of the
compressor according to the set point.
The sensor is also used for the displayed temperature.
Vertical coolers with fan
Most common placement is in the return air to the
evaporator. The sensor can be placed close to the
fan – even when the fan is pulsed during compressor
OFF periods: the updating of the temperature is
blocked when the fan is stopped and only updated
when the fan has been running for a while, so that the
heat from the fan does not affect the temperature
reading.
For applications sensitive to sub-zero temperatures,
sensor placement in the evaporator outlet air can be
considered.
Vertical freezers with fan
Placement in the return air or in the freezer
compartment.
Coolers without fan
The best results are normally obtained when the
sensor is placed at the side-wall, 10 cm from the back
and approximately at 1/3 from the bottom or where
the evaporator ends.
The control sensor must always be connected and is
used for controlling the cut-in and cut-out of the
compressor according to the set point.
The sensor is also used for the displayed temperature.
The evaporator sensor is only used for de-icing of the
evaporator and has no control purpose.
Placement of sensor
Place the sensor where the ice melts last.
Please be aware of that sharp finns can damage the
cable.
BC200686422115en-000802 | 29