Hoshizaki F-300BAF Removal and Replacement of Components, Service for Refrigerant Lines

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V. Removal and Replacement of Components

IMPORTANT

Ensure all components, fasteners and thumbscrews are securely in place after the equipment is serviced.

IMPORTANT

1.The Polyol Ester (POE) oils used in R-404A units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts.

2.Always install a new drier every time the sealed refrigeration system is opened.

3.Do not leave the system open for longer than 15 minutes when replacing or servicing parts.

A.Service for Refrigerant Lines

1. Refrigerant Recovery

The icemaker unit is provided with refrigerant access valves. Using proper refrigerant practices recover the refrigerant from the access valves and store it in an approved container. Do not discharge the refrigerant into the atmosphere.

2.Evacuation and Recharge [R-404A]

1)Attach service manifold hoses and a vacuum pump to the system. Be sure to connect charging hoses to both high-side and low-side access valves.

IMPORTANT

The vacuum level and vacuum pump may be the same as those for current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils.

2)Turn on the vacuum pump. Never allow the oil in the vacuum pump to flow backward.

3)Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends on pump capacity.

4)Close the low-side valve and high-side valve on the service manifold.

5)Disconnect the vacuum pump, and attach a refrigerant service cylinder to the high- side line. Remember to loosen the connection, and purge the air from the hose. See the nameplate for the required refrigerant charge. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No. 700-88 be used.

6)A liquid charge is recommended for charging an R-404A system. Invert the service cylinder and place it on scales. Open the high-side, service manifold valve.

7)Allow the system to charge with liquid until the proper charge weight is met.

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Contents Self-Contained Flaker Model 300BAF Hoshizaki AMERICA, INC Contents Upper Bearing Wear Check 300BAF Specifications IcemakerII. General Information Construction Ice Making Unit Auxiliary Code K-2 and L-0 Control Box LayoutAuxiliary Code M-1 and Later Auxiliary Code L-1 and M-0Solid-State Timer Board Control Timer BoardIce Production Check Sequence of Operation300BAF, F-500BAF Sequence Flow Chart and Component Operation 300BAF Auxiliary Code K-1 and Earlier Wiring DiagramAuxiliary Code K-2 and L-0 Auxiliary Code L-1 and M-0 Auxiliary Code M-1 and Later Sequence of Electrical Circuit Ice Purge Cycle Freeze Cycle Shutdown Cleaning Flush Switch Low Water Safety Spout Safety Switch High Pressure Switch ICE Production Performance DataIV. Service Diagnosis Diagnostic Procedure Page No Ice Production Diagnostic ChartsProblem Possible Cause Remedy Low Ice Production Other Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery Evacuation and Recharge R-404ABrazing Removal and Replacement of Compressor Removal and Replacement of Expansion Valve Removal and Replacement of DrierPage Removal and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of CutterRemoval and Replacement of Extruding Head Removal and Replacement of AugerRemoval and Replacement of Evaporator Page Removal and Replacement of Gear Motor 6b. Lower HousingRemoval and Replacement of Fan Motor Removal and Replacement of Inlet Water ValveRemoval and Replacement of Flush Water Valve Page Cleaning and Sanitizing Instructions VI. Cleaning and MaintenanceCleaning Solution Cleaning ProcedureSanitizing Solution Sanitizing Procedure Final Sanitizing Procedure InitialPage Stainless Steel Exterior MaintenanceStorage Bin and Scoop Air FilterPreparing the Icemaker for Long Storage
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