Hoshizaki F-80 I MAH (-c) VI. Removal and Replacement of Components, a Refrigerant Recovery

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VI. Removal and Replacement of Components

VI. Removal and Replacement of Components

IMPORTANT

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

IMPORTANT

1.The Polyolester (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 filter 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.

1.Service for Refrigerant Lines

[a] Refrigerant Recovery

The icemaker unit is provided with two refrigerant access valves - one on the low-side and one on the high-side line. 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.

[b]Evacuation and Recharge [R-404A]

1)Attach charging hoses, a service manifold 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.

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Contents HoshizakiHoshizaki America, Inc Number Issued Revised“A Superior Degree of Reliability” Modular Flaker Models F-801MAH-C F-801MWH-CAttn HOSHIZAKI Technical Support Department Phone 1-800-233-1940 Technical Service 770 487-2331 FaxComplete and detailed explanation of the problem HOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GACONTENTS 9. Removal and Replacement of Control Water Valve 5. Removal and Replacement of Expansion Valve7. Removal and Replacement of Evaporator Assembly 8. Removal and Replacement of Fan MotorF-801MAH I. Specification 1. IcemakerF-801MWH F-801MAH-C F-801MWH-C F-801MAH/-C II. General Information 1. ConstructionWater Supply Inlet Junction Box Water Regulator Compressor Drier F-801MWH/-CGEAR MOTOR 2. Control Box LayoutCONTROL TIMER FLUSHRUN CAPACITOR III. Technical Information 1. Water Circuit and Refrigeration Circuit F-801MWH/-C F-801MAH/-C, F-801MWH/-C 2. Wiring Diagrams3. Sequence of Electrical Circuit b When reservoir has been filled, gear motor starts immediately c Compressor starts about 60 sec. after gear motor starts Page e Low water except water-cooled model Page Page h When flush timer operates for 15 min. every 12 hours Page Page 4. Timing Chart Miswiring. Circuit Protect Relay operatesProper wiring. The unit starts 150 sec 1 sec60 sec 1. CIRCUIT PROTECT RELAY 2. WATER LEVEL UPPER 3. FLOAT SWITCH LOWER 5. Performance Data WATER FLOW FOR CONDENSER F-801MAH-C F-801MWH-C 1. Adjustment of Water Regulating Valve water-cooled model only IV. Adjustment of Components2. Adjustment of Flake Size REMEDY V. Service Diagnosis 1. No Ice ProductionPROBLEM POSSIBLE CAUSE PROBLEM REMEDY PROBLEM2. Low Ice Production POSSIBLE CAUSE3. Other b Evacuation and Recharge R-404A VI. Removal and Replacement of Components1. Service for Refrigerant Lines a Refrigerant Recovery2. Brazing DANGER 3. Removal and Replacement of Compressor 4. Removal and Replacement of Drier 5. Removal and Replacement of Expansion Valve Page Auger 7. Removal and Replacement of Evaporator AssemblyCutter Extruding HeadGear Motor Bearing-Lower and Mechanical Seal30 Turn on the power supply 27 When replacing the evaporatorc Check for leaks using nitrogen gas 140 PSIG and soap bubbles 28 Move the flush switch to the ICE positionSocket Head Cap Screw Evaporator Washer Socket Head Cap Screw Barrier Auger Mechanical Seal O-ring Bearing Lower Bolt WasherCoupling - Spline Rubber O-ring Nylon Ring Bolt Washer Cutter Extruding Head Washer9. Removal and Replacement of Control Water Valve 8. Removal and Replacement of Fan Motor10. Removal and Replacement of Flush Water Valve 1. Preparing the Icemaker for Long Storage VII. Cleaning and Maintenancea Cleaning Solution 2. Cleaning and Sanitizing Instructionsb Cleaning Procedure d Sanitizing Procedure - Initial c Sanitizing Solutione Sanitizing Procedure - Final 22 Turn on the power supply and start the automatic icemaking process 18 Move the flush switch to the “ICE” position and run the icemaker19 Turn off the power supply after 30 minutes 21 Flush out any solution from the storage bin3. Maintenance 4 Condenser except water-cooled model 3 Air Filter air-cooled model only