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630460150
FIGURE 5. EXPANSION VALVE
FIGURE 6. ADJUSTMENT SCREW
THERMOSTATIC
EXPANSION VALVE
SIGHT
GLASS
CONDENSER MODULATING VALVE REMOVAL
1. Disconnect power to unit, then shut off water supply to condenser and evacuate refrigerant from system.
2. Remove inlet water line from Condenser Modulating Valve. Also remove tube from high side refrigerant
line.
3. Remove Condenser Modulating Valve and bracket from unit.
4. Remove valve from bracket.
5. Replace Condenser Modulating Valve by reversing Steps 2 thru 4. Then pull system into vacuum.
6. Charge unit with proper amount of refrigeration.
7. Turn power and water on to unit.
8. With unit running, adjust modulating valve to proper setting.
9. Go through a complete system check.
BIN CONTROL
The type of bin control used on all UC Models is thermostatically controlled. The switch itself is inside the elec-
trical box of the Dispenser and can be serviced from the front of the unit. The cap tube bulb is located in the
thermostat well directly under the ice inlet.
To test switch, disconnect power to unit and remove one wire from switch. Connect both leads of your ohmme-
ter to the Bin Control Switch terminals. With control bulb at room temperature ohmmeter should read “Closed
Circuit”.
Now cover the control bulb with ice, within 1 minute switch should “click” and ohmmeter should read “Open Cir-
cuit.” The Bin control is in electrical series with a 24 volt transformer located in the ice dispenser and a 24 volt
control relay located in the Icemaker.
The Bin 24 volt control relay is in electrical series with coil on antifreeze relay along with the low water safety. If
unit is water cooled, the condenser high pressure cut out is also in series.
The Control Switch is held in place inside electrical box by 2 screws. Control bulb is positioned under ice chute
and can be replaced by removing the capillary from the thermostat well.
The most important thing to remember when replacing probe is to be careful not to cut or kink probe and be
sure sensor bulb is located in a position to shut unit down before ice reaches ice chute.
This icemaker is equipped with a safety ice level sensor. This sensor control is located on top of theevaporator.
This switch is also in electrical series with the anti-freeze relay and other safety circuitry.