System Information

Service Manual

Overall:		Electrical Sequence:
•	Refrigerant: 8 oz R-134a	A closed bin thermostat signals to the controller a
•	Compressor: Hermetic, 1300 BTUH, X HP	need for ice. The controller checks for water, if
		water is needed , the controller opens the inlet
•	Condenser: Forced draft
		water solenoid valve to fill the reservoir. The hot
•	Fan blade: 5 blade, 7 inch
		gas valve is open to equalize the system. When the
•	Evaporator: Inverted, 24 cube cells. Copper
		reservoir is full, the compressor, fan motor, water
	cups attached to continuous serpentine
		pump are switched on. After 5 seconds the hot gas
•	Metering device: Cap tube
		valve shuts and ice making begins.

•Defrost method: Hot gas bypass with water

	assist	Water is sprayed up into the inverted cup mold. As
•	Spray method: 6 water jets	the water is cooled and ice begins to form in the
•	Water charge: 40 ounces	cups, the temperature of the evaporator will fall.

•Water valve: 115 volt solenoid, .19 GPM

•	Water fill time: Varies with harvest time &	The freeze cycle continues until the temperature of
		the thermistor attached to the evaporator outlet
	purge setting
		tube falls to about zero degrees F. At that point the
•	Spray pump: Pedestal type.
		controller starts a freeze cycle timer, whose default
•	Drain pump: Magnetic drive, controlled by
		time is 10 minutes. At the end of the freeze cycle's
	pressure switch
		timed portion the controller switches to the harvest

•	Purge method: Overflow standpipe	cycle.

•Control method: Electronic

• Cycle control: Thermistor + timers		The harvest cycle begins with the controller
• Freeze cycle timer: 10 minutes, + - 4		stopping the water pump and fan motor. At the
• Freeze cycle timer: 10 minutes, + - 4		same time it opens the hot gas valve and the inlet
• Harvest cycle timer: 20 seconds, + - 40		same time it opens the hot gas valve and the inlet
• Harvest cycle timer: 20 seconds, + - 40		water solenoid valve. The ice is released by the
• Cube size adjustment: Freeze timer change.		water solenoid valve. The ice is released by the
• Cube size adjustment: Freeze timer change.		combination of discharge refrigerant gas entering
• Harvest cycle adjustment: Harvest timer		combination of discharge refrigerant gas entering
• Harvest cycle adjustment: Harvest timer		the evaporator serpentine and warming up the
	change	the evaporator serpentine and warming up the
	change	copper, plus the inlet water that flows to the
		copper, plus the inlet water that flows to the
• Bin control: Thermostat. Opens on		evaporator, floods across the plastic platen to
	temperature fall, Cut Out: 35 degrees F. Cut	warm it up and be pre-chilled for the next cycle. Ice
	In 45 degrees F. Range is adjustable.	cubes drop individually and harvest continues until
		the thermistor attached to the suction line warms
Electrical Components:		up to about 50 degrees F. At that point a harvest
		timer starts, whose default time is 20 seconds. At
•	Compressor	the end of that time the harvest cycle ends and the
•	Fan motor	freeze cycle restarts.

•Spray pump motor

•	Drain pump motor	Bin control.

•	Drain pump switch	The machine's on and off modes are regulated by a
• Bin light - LED type
		bin thermostat. The cap tube for the bin thermostat

•	Bin light switch - magnetic reed	is in the tube that holds the scoop. The machine
•	Inlet water solenoid valve	will only begin ice making when the thermostat's
•	Hot gas valve	contacts close. If the contacts re-open before the
•	Transformer	temperature of the evaporator drops below a preset
		point, the machine will stop. If the temperature is
•	Controller
		below that point when the contact s open, the
•	Water sensor
		machine will continue through a complete cycle
•	Thermistor
		and stop at the end of the harvest cycle.

•Bin thermostat

September 2008

Page 19