Hoshizaki 73180 Removal and Replacement of Components, Service for Refrigerant Lines

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V. Removal and Replacement of Components

WARNING

•This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire.

•Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet before servicing.

•CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the unit is serviced. Make sure that none have fallen into the storage bin.

•Make sure all food zones in the icemaker and storage bin are clean after the

unit is serviced. For cleaning procedures, see "VI.B. Cleaning and Sanitizing Instructions."

A. Service for Refrigerant Lines

WARNING

•Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA-certified service personnel.

•Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). DO NOT use R-134a as a mixture with pressurized air for leak testing.

NOTICE

•Always recover the refrigerant and store it in an approved container. Do not discharge the refrigerant into the atmosphere.

•Do not leave the system open for longer than 15 minutes when replacing or servicing parts. The Polyol Ester (POE) oils used in R-134a units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts.

•Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacement has been made.

•When brazing, protect the drier by using a wet cloth to prevent the drier from overheating. Do not allow the drier to exceed 250°F (121°C).

1.Refrigerant Recovery

No refrigerant access valves are provided on this unit. Using proper refrigerant practices, utilize a temporary tap-line valve on the high side to recover the refrigerant. Store the refrigerant in an approved container. Do not discharge the refrigerant into the atmosphere.

After recovery is complete, replace the tap-line valve with a proper, permanent access valve.

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Contents 100BAF-DS 100BAF-AD 100BAF-ADDS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page Auxiliary Codes A-1 and Earlier Specifications 100BAFAuxiliary Codes A-2 and Later 100BAF-DS 100BAF-DS, 2. Auxiliary Codes A-2 and Later 100BAF-AD 100BAF-AD, 2. Auxiliary Codes A-2 and Later 100BAF-ADDS 100BAF-ADDS, 2. Auxiliary Codes A-2 and Later Front II. General Information ConstructionAuxiliary Codes Rear Auxiliary CodesIcemaking Unit Freeze Cycle Sequence of OperationFill Cycle Auxiliary Codes A-1 and Earlier Auxiliary Codes A-2 and Later Auxiliary Codes A-2 and Later Wiring DiagramIcemaker with Optional Drain Pump HS-0248 100BAF Series Performance DataDiagnostic Procedure IV. Service DiagnosisIce Production Check Page Auxiliary Codes A-2 and Later Bin Control Check Float Switch Check Lower Float white Plastic Retainer Clip Float Switch CleaningOverview Optional Drain Pump HS-0248Drain Pump Check Priming Instructions Float Switch Cleaning No Ice Production Possible Cause Startup Diagnostic ChartsShutdown Fill Cycle and Refill Cycle Shutdown Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery Evacuation and Recharge R-134a BrazingComponent Important Notes for Component ReplacementRemoval and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of Extruding Head Removal and Replacement of Auger Removal and Replacement of Evaporator Page 5b. Lower Housing Page VI. Maintenance Frequency Area Task Maintenance ScheduleCleaning Solution Cleaning and Sanitizing InstructionsPage Sanitizing Solution Page Cleaning Solution Page Sanitizing Solution Storage Bin Drain Condenser Auxiliary Codes A-1 and Earlier Skip to step VII. Preparing the Icemaker for Periods of Non-UseVIII. Disposal
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