Sterlco GC Series Central Chiller - Manual (Page 30)

GC Series Central Chillers Chapter 4: Operation 30 of 79
Chapter 4: Operation
4-1 Panel Buttons, Indicator Lights, and Switches
Microprocessor Controller
The standard chillers use a microprocessor-based PID controller. The Carel PCO controller is
located in the control enclosure. The Carel PGD1 Interface is housed in a block of rigid
plastic with a magnetic backing that allows the user to “stick” the interface on any metallic
surface. The Standard Display for the GC70 through GC210 units come standard with a 20 ft
(6 m) cable. Longer cables are available through the After Market Sales Group. The
controller is factory set and adjusted; no field adjustment to the internal controls is necessary.
The standard operation range is 20ºF to 80ºF (-7ºC to 27ºC).
Warning! Operating the chiller setpoint below 45°F (7°C) without the proper
amount of glycol for freeze protection could result in a damaged
evaporator. ACS Group does not warrant the freeze up of the
evaporator under any circumstances.
Figure 10: Standard Controller Display