Main Chiller Controller Technical Guide
SECTION 3:
WIRING
31
Compressor Circuit Module Wiring
Figure 27: Compressor Circuit Module Wiring
Compressor Circuit Module Wiring
The G015560 Compressor Circuit Module is used only with
Turbocor
®
Compressors in Chiller operation. The Compressor Circuit
Module monitors and controls one refrigeration circuit of the Chiller.
The module is designed for R134a refrigerant.
The Compressor Circuit Module connects to the Main Chiller
Controller or another module using an EBC E-BUS cable. Up to 3
Compressor Circuit Modules can be connected, depending on the
size of the system.
Each Compressor Circuit Module will communicate with and control
its associated Compressor via Modbus from the Modbus Master port.
The Compressor Circuit Module must be connected to an 18-30 VAC
power source. See
Figure 27
, below
for wiring.
The Compressor Circuit Module provides the following features:
•
Controls the operation of the Compressor via
communications with the compressor control board.
•
Manages the isolation valve.
•
Manages the load balance/startup bypass valve.
•
Communicates with and manages operation of the
Economizer Subcooling Module.
•
Provides alarms and safeties for the Compressor
operation.
•
Provides a 2 x 8 LCD character display and 4
buttons that allow for status of system operation,
system setpoints, system confi gurations, sensors,
and alarms,and to change the module’s address, if
necessary.
