GP Series Portable Chillers Operation

Variable	Description	Access Level
Variable	Description	Operator	Supervisor
		Operator	Supervisor
Chil Hi Temp Dly	Time (in seconds) Chilled High Temperature alarm		x
Chil Hi Temp Dly	is ignored before activating		x
	is ignored before activating
	When set to CRIT, chiller and process high temp
	alarms will deactivate compressors and pumps.
Hi Temp Flt Type	When set to WARN, compressors and pumps are		x
	allowed to continue to operate when a high temp
	alarm occurs
Chil Lo T Wrn Dif	Temperature difference below the chiller setpoint		x
Chil Lo T Wrn Dif	before the chiller low temp warning alarm occurs		x
	before the chiller low temp warning alarm occurs
Chil Lo T Flt Dif	Temperature difference below the chiller setpoint		x
Chil Lo T Flt Dif	before the chiller low temp fault alarm occurs.		x
	before the chiller low temp fault alarm occurs.
Comp, Lead Cmp On Delay	Temperature Difference between Leaving Fluid		x
Comp, Lead Cmp On Delay	Temperature and Setpoint to turn on the compressor		x
	Temperature and Setpoint to turn on the compressor
Comp, Lead Cmp Off	Temperature Difference between Leaving Fluid		x
Delay	Temperature and Setpoint to turn off the compressor		x
Delay	Temperature and Setpoint to turn off the compressor
	Time (in minutes) before lag compressor is
Lag Cmp On Dly	energized once Chilled fluid reaches 2°F (1.1°C)		x
	above Chilled Fluid setpoint
	Time (in minutes) before lag compressor is de-
Lag Cmp Off Dly	energized once chilled fluid reaches 2°F (1.1°C)		x
	below Chilled Fluid setpoint
Cond Fan Start	Discharge pressure which energizes condenser fan		x

Cond Fan Stop	Discharge pressure which de-energizes condenser		x
Cond Fan Stop	fan		x
	fan
Pump Stop Delay	Delay time in seconds between fault and stopping		x
Pump Stop Delay	the pump		x
	the pump
Heater On Delay	Time (in seconds) before the heater is allowed to		x
Heater On Delay	activate once the last compressor stages off		x
	activate once the last compressor stages off
	Time (in seconds) between sampling the output of
	the heater’s PID loop. For example, if this variable
Heater Cycle Tm	is set to ten (10), the heater PID loop output is		x
	checked every ten seconds. If the heater PID loop
	output is 70% when sampled the heater output will
	be on for 7 seconds and off for 3 seconds.
Heater P	P parameter of the heater PID loop		x

Heater I	I parameter of the heater PID loop		x

Heater D	D parameter of the heater PID loop		x

Cooling Valve P	P parameter of the cooling valve PID loop		x

Cooling Valve I	I parameter of the cooling valve PID loop		x

Cooling Valve D	D parameter of the cooling valve PID loop		x

	When in AUTO, the cooling valve is controlled by
Cooling Valve Mode	the cooling valve PID loop. When in MANUAL,		x
	the cooling valve is forced open to the percent
	dictated by the Cooling Valve Pos variable.
	When the Cooling Valve Mode is set to MANUAL,		x
Cooling Valve Pos	this variable dictates what percentage the valve is		x
	forced to.
	Minimum tank level. Used to set the default low		x
Tank Min Lvl	tank lefvel alarm setpoints as well as the auto-water		x
	makeup on setpoint.

GP Series Portable Chillers

Chapter 4: Operation

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