GP Series Portable Chillers Chapter 4: Operation 41 of 90

4-4 Access Levels

The controller is setup to allow access to three distinct password groups: operator, supervisor,

and service. Operator access allows the user to modify the Leaving Water Temp, Hi Temp

Warning, and Hi Temp Fault setpoints. Supervisor access allows the supervisor to modify the

above plus

Selecting any of the menus in the Menu Screen will display the Password Screen.

4-5 Controller Setpoints

Variable Description
Access Level
Operator
Supervisor
Chilled Fluid SP Temperature of chilled fluid out to process x x
Chil Hi Temp Wrn Setpoint for alarm to warn when chilled leaving fluid
temperature is too high
x x
Chil Hi Temp Flt Setpoint to shut down pump and compressor based
on leaving fluid temperature
x x
Process SP Temperature of tempered fluid out to process x x
Proc Hi Temp Wrn Setpoint for alarm to warn when tempered leaving
fluid temperature is too high x x
Proc Hi Temp Flt Setpoint for alarm to warn when tempered leaving
fluid temperature is too high x x
Proc Low Temp Wrn Setpoint for alarm to warn when tempered leaving
fluid temperature is too low x x
Proc Low Temp Flt
Setpoint for alarm to warn when tempered leaving
fluid temperature is too low x x
Cooling Enabled Refrigeration system allowed to operate x
Heating Enabled Optional Process temperature heater allowed to
operate
x
Fluid Freeze Point
Lowest temperature fluid will operate without
freezing. Below 32°F (0°C) glycol must be added.
Forces lowest Chilled fluid setpoint to be 13°F (7°C)
above FFP
x
Chill On Diff Temperature difference above chilled fluid setpoint
before compressor turns on
x
Chill Off Diff Temperature difference below chilled fluid setpoint
before compressor turns off
x
Proc On Diff Temperature difference below process setpoint
before process heater turns on x
Proc Off Diff Temperature difference above process setpoint
before process heater turns off x
Proc Hi Temp Dly Time (in seconds) Process High Temperature alarm
is ignored before activating x