CoreSense™ Protection technology for Copeland Discus™ compressors is a system of algorithms read off an electronic module, installed on the compressor, that offers a combination of oil and motor protection as well as optional protection against high discharge temperatures and communication compatibility with MODBUS communication devices. Display LEDs show the operational status of the compressor and whether there are any active compressor warnings, trips, or lockouts.
When CoreSense Protection senses a fault that the compressor is running in an unsustainable condition, it responds by shutting down the compressor to avoid imminent damage. Based on fault severity, the compressor will either reset itself when the condition is cleared or require a technician to troubleshoot the fault before restarting. Its communication capability also makes it possible to retrieve information and take action remotely, such as resetting and compressor proofing. The CoreSense Protection product line is now standard on Copeland 2D, 3D, 4D, and 6D Discus compressors, adding a number of important sensing and protection functions. It can be used with digital or conventional unloaded compressors and with variable frequency drives.
Basic Protection Features
CoreSense Protection technology replaces the need for mechanical oil pressure sensing devices such as the current Sentronic+ as well as older versions of the Copeland Sentronic oil pressure control. It offers value adds such as the communication of low oil pressure warnings, oil pressure trips, and oil pressure lockouts via LED codes and/or a supervisory rack controller, such as Emerson Retail Solutions’ E2.
Insufficient oil pressure time for the compressor is stored and accumulated in the module memory. Once the total time accumulated for bad oil pressure (a reading less than 7 – 9 PSID) exceeds 120 seconds, the module will shut the compressor off and a “low oil pressure lockout” will be reported. The compressor will run back on once the reset has been activated either manually or remotely through the communication network, or when power has been cycled to the CoreSense Protection module.
On Copeland 4D and 6D discus compressors, CoreSense Protection also provides protection for the motor, replacing the Kriwan module INT369R.
The CoreSense Protection module will communicate a motor protection trip when the resistance caused by increasing motor temperature rises above 13 kOhms. The compressor will restart once the resistance drops below 3.2 kOhms.
Optional Protection Features
- Optional High Discharge Temperature Protection
- Kit Number: 985-0109-50
By installing the temperature probe into the head of the Discus compressor and connecting to the CPM, CoreSense Protection for Copeland Discus compressors can also provide valuable discharge temperature protection. If the temperature sensor detects a head temperature greater than 310 F, the CoreSense will trip the compressor off until the temperature cools to an acceptable level. A high discharge temperature lockout can also be enabled through the E2 (click here to learn more about the E2).
Communication between the rack controller and each CoreSense Diagnostics module is through an RS485 network with MODBUS. It may be used with an Emerson E2 controller for a full range of benefits or third party controllers that have modbus mapping capability for a limited range of benefits. Communications with an E2 controller offers many benefits including: remote reset, fault history, compressor proofing, compressor asset information, remote troubleshooting and more.
Variable Frequency Drives
CoreSense Protection may be used with variable frequency drives.
Compatibility with Copeland Demand Cooling™
CoreSense Protection is compatible with Copeland Demand Cooling™. However, the discharge temperature information will not be communicated to the CoreSense protection module as the protection is provided by the Demand Cooling module.