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

x

x

 

temperature is too high

 

 

 

 

 

Chil Hi Temp Flt

Setpoint to shut down pump and compressor based

x

x

 

on leaving fluid temperature

 

 

 

 

 

Process SP

Temperature of tempered fluid out to process

x

x

 

 

 

 

 

 

Proc Hi Temp Wrn

Setpoint for alarm to warn when tempered leaving

x

x

 

fluid temperature is too high

 

 

 

 

 

Proc Hi Temp Flt

Setpoint for alarm to warn when tempered leaving

x

x

 

fluid temperature is too high

 

 

 

 

 

Proc Low Temp Wrn

Setpoint for alarm to warn when tempered leaving

x

x

 

fluid temperature is too low

 

 

 

 

 

Proc Low Temp Flt

Setpoint for alarm to warn when tempered leaving

x

x

 

fluid temperature is too low

 

 

 

 

 

Cooling Enabled

Refrigeration system allowed to operate

 

x

 

 

 

 

 

 

Heating Enabled

Optional Process temperature heater allowed to

 

x

 

operate

 

 

 

 

 

 

 

Lowest temperature fluid will operate without

 

 

 

Fluid Freeze Point

freezing. Below 32°F (0°C) glycol must be added.

 

x

 

Forces lowest Chilled fluid setpoint to be 13°F (7°C)

 

 

 

 

 

 

 

above FFP

 

 

 

Chill On Diff

Temperature difference above chilled fluid setpoint

 

x

 

before compressor turns on

 

 

 

 

 

 

Chill Off Diff

Temperature difference below chilled fluid setpoint

 

x

 

before compressor turns off

 

 

 

 

 

 

Proc On Diff

Temperature difference below process setpoint

 

x

 

before process heater turns on

 

 

 

 

 

 

Proc Off Diff

Temperature difference above process setpoint

 

x

 

before process heater turns off

 

 

 

 

 

 

Proc Hi Temp Dly

Time (in seconds) Process High Temperature alarm

 

x

 

is ignored before activating

 

 

 

 

 

GP Series Portable Chillers

Chapter 4: Operation

41 of 90

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Sterling 882.93092.01 manual Access Levels, Controller Setpoints

882.93092.01 specifications

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