Cornelius UC 701 service manual Condenser Modulating Valve Removal, BIN Control

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SIGHT

GLASS

THERMOSTATIC

EXPANSION VALVE

FIGURE 5. EXPANSION VALVE

FIGURE 6. ADJUSTMENT SCREW

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.

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Contents UC 701 Series CONTINUOUS-FLOW Icemaker Table of Contents Table of Contents cont’d Understand Signal Words Safety InformationRecognize Safety Information Follow Safety InstructionsThis page Left Blank Intentionally Description General DescriptionTo the User of this Manual Claims InstructionsSpecification Chart Clearance Requirements This page Left Blank Intentionally Installation PRE-INSTALLATIONInstallation Side Bracket InstallationInitial Start UP, Checks and Adjustment Instructions Icemaker Float AssemblyThis page Left Blank Intentionally Maintenance Guide to ServiceIcemaker Cleaning and Sanitizing Procedures MonthlyHow Water Level Control Works Water Level ControlSemi-Annually PurposeRefrigeration System Refrigeration System AdjustmentsTo Replace Water Level Safety Switch To Replace Water Level ControlAdjustment and Troubleshooting Expansion ValveCondenser Modulating Valve Condenser Modulating Valve Removal BIN ControlGearmotor Motor CheckTo Replace Gearmotor Assembly Start RelayUpper NUT and Bearing Assembly Auger and Extruding Head RemovalTo Replace Bearing Electrical Checkout Capacitor CheckSafety Controls Gear Motor OverloadGuide to Good ICE Wiring Diagram Troubleshooting Chart Icemaker not Operating Troubleshooting Troubleshooting CompressorsCertificate of Warranty IMI CorneliusThis page Left Blank Intentionally IMI Cornelius INC