Hoshizaki KMD-410MWH, KMD-410MAH manual Removal and Replacement Service for Refrigerant Lines

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V. REMOVAL AND REPLACEMENT

1. SERVICE FOR REFRIGERANT LINES

[a] SERVICE INFORMATION

1) Allowable Compressor Opening Time and Prevention of Lubricant Mixture [R404A]

The compressor must not be opened more than 15 minutes in replacement or service. Do not mix lubricants of different compressors even if both are charged with the same refrigerant, except when they use the same lubricant.

2) Treatment for Refrigerant Leak [R404A]

If a refrigerant leak occurs in the low side of an ice maker, air may be drawn in. Even if the low side pressure is higher than the atmospheric pressure in normal operation, a continuous refrigerant leak will eventually lower the low side pressure below the atmospheric pressure and will cause air suction. Air contains a large amount of moisture, and ester oil easily absorbs a lot of moisture. If an ice maker charged with R404A has possibly drawn in air, the drier must be replaced. Be sure to use a drier designed for R404A.

3) Handling of Handy Flux [R404A]

Repair of the refrigerant circuit requires brazing. It is no problem to use the same handy flux that has been used for the current refrigerants. However, its entrance into the refrigerant circuit should be avoided as much as possible.

4) Oil for Processing of Copper Tubing [R404A]

When processing the copper tubing for service, wipe off oil, if any used, by using alcohol or the like. Do not use too much oil or let it into the tubing, as wax contained in the oil will clog the capillary tubing.

5) Service Parts for R404A

Some parts used for refrigerants other than R404A are similar to those for R404A. But never use any parts unless they are specified for R404A because their endurance against the refrigerant have not been evaluated. Also, for R404A, do not use any parts that have been used for other refrigerants. Otherwise, wax and chlorine remaining on the parts may adversely affect R404A.

6) Replacement Copper Tubing [R404A]

The copper tubes currently in use are suitable for R404A. But do not use them if oily inside. The residual oil in copper tubes should be as little as possible. (Low residual oil type copper tubes are used in the shipped units.)

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Contents Page Page Contents Page KMD-410MAH air-cooled SpecificationsWater Cooled Condenser KMD-410MWH water-cooledKMD-410MAH II. General Information ConstructionKMD-410MWH Freeze Cycle Sequence of OperationONE Minute Fill Cycle Initial Harvest CycleNormal Harvest Cycle KMD-410MAH, 410MWH Control Board Control Board Layout Low Water Safety Features Maximum Water Supply Period 6 minutesHarvest Backup Timer and Freeze Timer High Temperature SafetySequence of Operation LED Lights and Audible Alarm SafetiesHarvest Timer S1 dip switch 1 Controls and Adjustments Default Dip Switch SettingsDrain Timer S1 dip switch 3 Drain Frequency Control S1 dip switch 5Water Saver Timer S1 dip switch 7 Freeze Timer S1 dip switch 9 Pump-Out Pump Motor Delay S2 dip switchFactory Use S2 dip switch 5 Program Ver .5 or earlier Refill Counter S2 dip switch 3 Program Ver .1, Ver Anti-Slush Control S2 dip switch 6 Program Ver Control Board Replacement Control Board Check ProcedureHarvest Control Thermistor Explanation of Operation Float SwitchCleaning Float Switch Check ProcedureBIN Control BIN Control Check ProcedureSwitches Control SwitchService Switch Page Magnetic contactor wiring depends on the contactor model Wiring DiagramTiming Chart148 Performance Data440 IV. Service Diagnosis Minute Diagnostic Procedure Page No ICE Production Diagnostic ChartsPage See II . d Control Board Check Procedure Evaporator is Frozen UP Abnormal ICE LOW ICE ProductionOther Removal and Replacement Service for Refrigerant Lines Evacuation and Recharge Refrigerant RecoveryEvacuation, Vacuum Pump and Refrigerant Charge R404A Refrigerant Leak CheckBrazing Compressor Drier HOT GAS Valve Expansion Valve Evaporator Water Regulating Valve WATER-COOLED Model only FAN Motor Adjustment of Water Regulating Valve WATER-COOLED Model onlyPump Motor Water Valve Drain VALVE, Cleaning ValveWater Tank Float Switch BIN Control Switch Thermistor Control BOX Push Buttons Control Board Control & Service SwitchFuse Fuse HolderStart Capacitor Spray TUBE, Water Supply TUBE, Spray GuideStarter RUN CapacitorTabs Hose Band Water Supply Tube Under Spray Tube Cleaning Procedure VI. Cleaning and Maintenance InstructionsPage Page Sanitizing Procedure Following Cleaning Procedure MaintenanceAIR Filters AIR-COOLED Model only Preparing the Icemaker for Long StorageStainless Steel Exterior Storage BIN and ScoopDrain the water tank Remove the water from the icemaker water supply line
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KMD-410MWH, KMD-410MAH specifications

The Hoshizaki KMD-410MWH and KMD-410MAH are premier ice makers, designed for commercial establishments that require high-efficiency ice production. These units stand out for their advanced features and technology that cater to the diverse needs of restaurants, bars, and hotels.

One of the primary features of the KMD-410 lineup is its impressive ice production capacity. With a production rate of up to 410 pounds of cube ice in a 24-hour period, each model ensures a steady supply of ice, which is essential for businesses with high demand. The ice produced is in the form of clear, hard cubes, ideal for beverage cooling, cocktail preparation, and food presentation.

Both models showcase the unique Hoshizaki ice-making system, which employs a direct cooling method. This technology uses individual stainless steel evaporators to produce ice, resulting in more uniform cubes and less waste. The stainless steel construction contributes to the durability of the units, making them suitable for rugged commercial environments.

Energy efficiency is another hallmark of the KMD-410MWH and KMD-410MAH. These machines are designed with an energy-saving mode that reduces power consumption without compromising ice production. This is critical for businesses looking to minimize operational costs while maintaining high standards of service.

User convenience is prioritized in these models through features like the easy-to-clean design. The internal components can be accessed quickly, allowing for simpler maintenance and sanitation processes. Additionally, the built-in cleaning cycle aids in maintaining ice purity and preventing bacterial growth, which is essential for food safety.

The KMD-410MAH also includes an advanced monitoring system with indicators for water usage and ice levels. This feature allows operators to keep track of performance and make necessary adjustments, ensuring that the ice maker operates at peak efficiency.

For installation flexibility, both models can be paired with various storage bins and dispensers, adapting to the layout of any establishment. Furthermore, they can be equipped with optional filtration systems that enhance water quality, further improving the taste and clarity of the ice produced.

In summary, the Hoshizaki KMD-410MWH and KMD-410MAH ice makers are exemplary choices for any business that demands high-quality, reliable ice production. Their robust features, energy-efficient operation, and user-friendly design make them indispensable assets in the hospitality and foodservice industries.
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