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Hoshizaki F-80 I MAH (-c), F-80 I MWH (-c) service manual IV. Adjustment of Components

Models: F-80 I MAH (-c) F-80 I MWH (-c)

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IV. Adjustment of Components

IV. Adjustment of Components

1. Adjustment of Water Regulating Valve (water-cooled model only)

The water regulating valve or also called “water regulator” is factory-adjusted. No adjustment is required under normal use. Adjust the water regulator , if necessary, using the following procedures.

1)Attach a pressure gauge to the high-side line of the system. Or prepare a thermometer to check the condenser drain temperature.

2)Rotate the adjustment screw by using a flat blade screwdriver, so that the pressure gauge shows 260 PSIG (R-404A models/-F type), or the thermometer reads 100 -104°F, in 5 minutes after the icemaking process starts. When the pressure exceeds 260 PSIG, or the condenser drain temperature exceeds 104°F, rotate the adjustment screw counterclock- wise.

3)Check that the pressure or the condenser drain temperature holds a stable setting.

Adjustment Screw

Adjustment Screw

CW

CCW

Bottom View

CW - Higher

CCW - Lower

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Hoshizaki F-80 I MAH (-c) IV. Adjustment of Components, Adjustment of Water Regulating Valve water-cooled model only

Contents

“A Superior Degree of Reliability” Number Issued RevisedModular Flaker Models F-801MAH-C F-801MWH-C HoshizakiHoshizaki America, IncComplete and detailed explanation of the problem Phone 1-800-233-1940 Technical Service 770 487-2331 FaxHOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GA Attn HOSHIZAKI Technical Support DepartmentCONTENTS 7. Removal and Replacement of Evaporator Assembly 5. Removal and Replacement of Expansion Valve8. Removal and Replacement of Fan Motor 9. Removal and Replacement of Control Water ValveF-801MAH I. Specification 1. IcemakerF-801MWH F-801MAH-C F-801MWH-C F-801MAH/-C II. General Information 1. ConstructionControl Water Valve Bin Control Ice Chute Evaporator Expansion Valve F-801MWH/-CFlush Water Valve Control Box Gear Motor Water Supply Inlet Junction Box Water Regulator Compressor Drier2. Control Box Layout F-801MAH/-CGEAR MOTOR F-801MWH/-C CONTROL TIMERFLUSH RUN CAPACITORF-801MAH/-C III. Technical Information 1. Water Circuit and Refrigeration CircuitF-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 F-801MAH 5. Performance DataWATER FLOW FOR CONDENSER F-801MWHF-801MAH-C F-801MWH-C 1. Adjustment of Water Regulating Valve water-cooled model only IV. Adjustment of Components2. Adjustment of Flake Size PROBLEM V. Service Diagnosis 1. No Ice ProductionPOSSIBLE CAUSE REMEDYPROBLEM POSSIBLE CAUSEREMEDY 2. Low Ice Production PROBLEMPOSSIBLE CAUSE REMEDYPROBLEM 3. OtherPOSSIBLE CAUSE REMEDY1. Service for Refrigerant Lines VI. Removal and Replacement of Componentsa Refrigerant Recovery b Evacuation and Recharge R-404A2. Brazing DANGER 3. Removal and Replacement of Compressor 4. Removal and Replacement of Drier 5. Removal and Replacement of Expansion Valve Page Cutter 7. Removal and Replacement of Evaporator AssemblyExtruding Head AugerGear Motor Bearing-Lower and Mechanical Sealc Check for leaks using nitrogen gas 140 PSIG and soap bubbles 27 When replacing the evaporator28 Move the flush switch to the ICE position 30 Turn on the power supplyCoupling - Spline Auger Mechanical Seal O-ring Bearing Lower Bolt WasherRubber O-ring Nylon Ring Bolt Washer Cutter Extruding Head Washer Socket Head Cap Screw Evaporator Washer Socket Head Cap Screw Barrier9. 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 19 Turn off the power supply after 30 minutes 18 Move the flush switch to the “ICE” position and run the icemaker21 Flush out any solution from the storage bin 22 Turn on the power supply and start the automatic icemaking process3. Maintenance 4 Condenser except water-cooled model 3 Air Filter air-cooled model only