ems100
Product Manual, Issue 4
www.nexo.com
Page 13
2.
ACCESSORIES
2.1
Temperature sensors
Temperature sensors are available from Elstat with various cable lengths. To help identify sensor cables
during the installation, Elstat can supply sensor cables with blue identification sleeves. For example,
if the appliance sensor cable is plain black; the condenser sensor cable can be purchased with a blue
identification sleeve.
The sensor circuit is designed for safety extra low voltage (SELV). Therefore, if the sensor cable needs to be
joined during production or maintenance, only connectors normally used in SELV circuits can be used.
Note
Connectors designed to carry mains voltages must not be used to join cables to the
sensor circuit.
The temperature sensors have a negative temperature coefficient (NTC). Each make and type of sensor has
a specific resistance versus temperature curve. Therefore, only sensors supplied by Elstat should be used.
The NTC thermistor is rated from -35ºC to 125ºC (-31ºF to 257ºF).
2.1.1 Appliance sensor
The appliance sensor measures air temperature
of the refrigerated compartment by measuring
the return air temperature.
The diagram shows the
recommended position of
the appliance sensor.
The appliance sensor
measures the air
temperature after the
air has been drawn over
the products. The return
air provides a close
approximation of the
product temperature.
To measure the return air
temperature, secure the sensor to allow air to flow over the sensor head.
The sensor head should be placed at a right-angle to the air flow and secured using a
P-clip. The sensor head should not be completely covered by the P-clip or the sensor
will not function correctly.
Note
The sensor head is fragile and can easily be damaged. Do not use cable ties to secure
the sensor head or sensor cable as this invalidates the warranty.
To help place the appliance sensor, the parameter calibration 1 (CA1) defines an offset temperature. For
more information refer to Parameters section.
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