Emerson Copeland Stream 4MF-13X - Coresense Protection; Motor Protection

16 C6.3.1/0116-0716/E
For the electrical connection of the CoreSense Diagnostics module, refer to the wiring diagram
below:
Figure 14: CoreSense module wiring diagram
NOTE: For more information please refer to Technical Information D7.8.4 "CoreSense™
Diagnostics for Stream refrigeration compressors".
4.6 CoreSense™ Protection
4.6.1 Motor protection
Stream compressors with "-P" at the end of the description are equipped with a CoreSense
Protection device. The temperature-dependent resistance of the thermistor (also PTC-
resistance) is used to sense the winding temperature. Two chains of three thermistors each
connected in series are embedded in the motor windings in such a manner that the temperature
of the thermistors can follow with little inertia.
The CoreSense Protection module switches a control relay depending on the thermistor
resistance. It is installed in the terminal box to which the thermistors are connected.
Caution: The maximum test voltage for thermistors is 3V.
The total resistance of the thermistor chains on a cold compressor should be ≤ 1800Ω.
Protection class of the module: IP20.
IMPORTANT
Different sources for power supply and contact 11-14! Module
malfunction! Use the same potential for the power supply (L) and the switch
contact of the control loop (11-14).
Control circuit wiring:
Figure 15: Control circuit wiring diagram