Hoshizaki KM-2400SRH3, KM-2400SRF3 service manual Brazing

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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 Charge Label in the machine compartment. 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. Open the High-side, Service Manifold Valve.

7)Allow the system to charge with liquid until the pressures balance.

8)If necessary, add any remaining charge to the system through the Low-side. Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the Low-side access port with the unit running.

9)Close the two Refrigerant Access Valves, and disconnect the Hoses and Service Manifold.

10) Cap the Access Valves to prevent a possible leak.

2. BRAZING

DANGER

1.Refrigerant R-404A itself is not flammable at atmospheric pressure and temperatures up to 176° F.

2.Refrigerant R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames) R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous.

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

4.Do not use silver alloy or copper alloy containing Arsenic.

5.Do not use R-404A as a mixture with pressurized air for leak testing. Refrigerant leaks can be detected by charging the unit with a little refrigerant, raising the pressure with nitrogen and using an electronic leak detector.

Note: All brazing-connections inside the Evaporator Case are clear-paint coated. Sandpaper the brazing connections before unbrazing the components. Use a good abrasive cloth to remove coating.

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Contents Stackable Crescent Cuber Hoshizaki AMERICA, INC Contents Maintenance Specifications Condensing UNIT, URC-24F Specifications Model URC-24F II. General Information Construction Controller Board Features of Control Products E Controller BoardSOLID-STATE Control Controller BoardPage Minute Fill Cycle Beep every 3 sec. = High Evaporator Temperature 127 FHarvest Cycle Freeze CycleControl Products HOSHIZAKI001 Board Control Products HOS-001A Board Sequence 1st Cycle Important Water Valve opening is limited to 6 minutes 2nd Cycle and after with pump drain2nd Cycle and after with no pump drain OFF Controls and AdjustmentsSetting Time Setting Frequency Checking the Controller Board Page III. Technical Information Wiring Diagram Timing Chart Page Performance Data Problem Possible Cause Remedy IV. Service Diagnosis No ICE ProductionController Board Problem Possible Cause Remedy Thermistor Evaporator is Frozen UPLOW ICE Production Abnormal ICEOthers Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery Evacuation and Recharge R-404ABrazing Removal and Replacement of Compressor Important Removal and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of HOT GAS Valve and Line Valve Removal and Replacement of Evaporator Important Page Removal and Replacement of Thermistor Caution Removal and Replacement of FAN Motor Removal and Replacement of Pump Motor Removal and Replacement of Water ValveRemoval and Replacement of Spray Tubes Preparing the Icemaker for Long Storage VI. Cleaning and Maintenance Instructions ImportantPage Cleaning Procedure Cleaning Procedure Page Sanitizing Procedure Following Cleaning Procedure Maintenance