Zone
Zone
SECTION 3: WIRING
Main Chiller Controller Technical Guide
32
Economizer Subcool Module Wiring
The G015570 Economizer Subcool Module is used only with
Turbocor
®
Compressors in Chiller operation. The Economizer
Subcool Module monitors and controls the subcooling for one
refrigeration circuit of the Chiller. The module is designed for
R134a refrigerant.
The Economizer Subcool Module connects to the Main Chiller
Controller or another module using an EBC E-BUS cable. Up to 3
Economizer Subcool Modules can be connected, depending on the
size of the system.
The Economizer Subcool Module must be connected to an 18-30
VAC power source. See
Figure 28
, below for wiring.
Economizer Subcool Module Wiring
Figure 28: Economizer Subcool Module Wiring
The Economizer Subcool Module provides the following features:
•
Modulates the MCS Economizer Expansion Valves to
maintain the Superheat Setpoint of the Sub-Cooler.
• Receives its run/stop from the Compressor Circuit
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.
