4-6 Programming the Electronic High/Low Thermostat

The thermostat control is located in the chiller enclosure. The control has three control keys and a one-line, four-character LCD display.

The thermostat control has a lockout slide switch to prevent tampering by unauthorized personnel. The switch is located on the inside cover of the thermostat. The keypad is disabled when the switch is moved to the left in the “Lock” position. The keypad functions normally when the switch is moved to the right in the “Unlock” position. All chillers are shipped with the switch in the “Lock” position.

Thermostat Buttons

Indicator Name

Description

SET

Set Button

The Set button is used to enter the programming

 

mode for the thermostat.

 

 

 

Up Arrow button

Each press of the Down Arrow key decrements or

 

 

reduces values or settings on the display

 

Down Arrow

Each press of the Up Arrow key increments or

 

button

advances the values or settings on the display.

2-40 HP Portable Chillers

Chapter 4: Operation

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