Compressors With Coresense Protection - Emerson Copeland 4MF-13X Application Manuallines

4.5.3 Compressors with CoreSense Protection

WARNING
Ignition source in a potentially flammable atmosphere! Fire hazard! The
CoreSense protection module is not an ignition source during normal
operation in an A2L-refrigerant system but could become one if not installed
and connected properly.
As an alternative to the standard Copeland compressor electronics, the compressors can also be
delivered with CoreSense Protection, a more basic compressor protection. This compressor variation
is available as an option in compressor production and must be ordered accordingly.
CoreSense Protection – Specifications
4.5.3.1
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).
Stream compressors with "-P" at the end of the description are equipped with a CoreSense Protection
device. The temperature-dependent resistance of the thermistor (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 3 V.
The total resistance of the thermistor chains on a cold compressor should be ≤ 1800 Ω.
Protection class of the module: IP20.
Figure 31: Control circuit wiring diagram
26 AGL_Stream_ST_A2L_A1_4M_6M_EN_Rev00