Hoshizaki DKM-500BAH service manual Removal and Replacement of Evaporator

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1)Turn off the power supply.

2)Remove the panels. Be sure to disconnect the dispense switch connector from the control box when removing the front panel.

3)Recover the refrigerant and store it in an approved container.

4)Remove the screw and the solenoid.

5)Disconnect the hot gas valve using brazing equipment.

6)Install the new valve.

CAUTION

Always protect the valve body by using a damp cloth to prevent the valve from overheating. Do not braze with the valve body exceeding 250°F (121°C).

7)Install the new drier.

8)Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.

9)Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge.

10)Cut the leads of the solenoid allowing enough lead length to reconnect using closed end connectors.

11)Connect the new solenoid leads.

12)Attach the solenoid to the valve body, and secure it with a screw.

13)Replace the panels in their correct positions.

14)Turn on the power supply.

G.Removal and Replacement of Evaporator

IMPORTANT

1.Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repairs or replacement have been made.

2.Because the pipes in the evaporator section are specially coated to resist corrosion, it is important to make the new evaporator inlet and outlet piping connections outside the evaporator section as described below.

1)Turn off the power supply.

2)Remove the outer panels and the evaporator insulation panels. Be sure to disconnect the dispense switch connector from the control box when removing the front panel.

3)Recover the refrigerant and store it in an approved container.

4)Remove the spray tubes and the insulations at the "U" shaped notch where the refrigeration tubings go through the molded chassis.

5)Remove the insulation tube, and disconnect the evaporator inlet piping at the tee before the expansion valve. Disconnect the evaporator outlet piping before the heat exchanger.

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Contents DKM-500BAH Hoshizaki AMERICA, INC Contents Page Specifications DKM-500BAHII. General Information Construction DKM-500BAHSequence of Operation DKM-500BAH Sequence Flow Chart and Component Operation CycleControl Board Control Products E Control Board Control Board LayoutControl Board Harvest Backup Timer and Freeze Timer High Temperature SafetyLow Water Safety Maximum Water Supply Period 6 minutesLED Lights and Audible Alarm Safeties PM, SR, DVControls and Adjustments Default Dip Switch SettingsHarvest Control Thermistor Harvest Timer dip switch 1 Pump-Out Timer dip switch 3Pump-Out Frequency Control dip switch 5 Freeze Timer dip switch 9Bin Control Bin Control Troubleshooting Control Board Check ProcedureMachine Will Not Start Machine Will Not Shut OffSwitches Control Board ReplacementControl Switch Service SwitchCirculate WashDKM-500BAH Wiring Diagram Timing Chart Page Performance Data 110IV. Service Diagnosis Minute Diagnostic Procedure Diagnostic Charts Ice MakingNo Ice Production Problem Possible Cause Remedy Problem Possible Cause Remedy Evaporator is Frozen Up Low Ice Production Abnormal IceOther DispensingProblem Possible Cause Remedy Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Evacuation and Recharge R-404ARemoval and Replacement of Compressor BrazingRemoval and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of Hot Gas ValveRemoval and Replacement of Evaporator Removal and Replacement of Condenser Removal and Replacement of Thermistor Removal and Replacement of Fan MotorRemoval and Replacement of Inlet Water Valve Removal and Replacement of Pump MotorRemoval and Replacement of Spray Tubes Removal and Replacement of Gear MotorRemoval and Replacement of Dispense Switch Removal and Replacement of SolenoidVI. Cleaning and Maintenance Instructions Cleaning InstructionsCleaning Procedure Icemaker Sanitizing Procedure Icemaker Cleaning Procedure Bin Sanitizing Procedure BinMaintenance Instructions Preparing the Icemaker for Long StorageExterior Panels Air Filters

DKM-500BAH specifications

The Hoshizaki DKM-500BAH is a high-performing ice maker renowned in the food service industry for its reliability and efficiency. This unit excels in producing crescent-style ice, which is highly sought after for its ability to chill beverages effectively while minimizing dilution. The Hoshizaki reputation for quality is well-reflected in the DKM-500BAH, making it a popular choice in restaurants, bars, and other establishments that demand high ice production capacity.

One of the standout features of the DKM-500BAH is its impressive ice production capability. This model has the capacity to produce up to 500 pounds of ice per day, ensuring that businesses with high-volume demands can meet their needs without interruption. The unit operates on a refrigerant system designed for optimal energy efficiency, which can lower operating costs and contribute to sustainability goals.

The DKM-500BAH utilizes advanced technology, including Hoshizaki's patented ice-making mechanism. This system features a stainless steel evaporator that enhances durability and ice quality. The crescent-shaped ice it produces has a slower melt rate, making it perfect for restaurants and bars that focus on customer experience. Additionally, the unit is equipped with a cycle control that ensures ice is produced consistently.

Another critical aspect of the DKM-500BAH is its user-friendly design. It features a front-facing control panel that allows for easy monitoring and adjustment of settings. A built-in diagnostics system alerts users to potential issues, enabling prompt maintenance and reducing downtime. The removable air filter is another convenience, making it simple to clean and maintain the unit’s efficiency.

Moreover, the construction of the DKM-500BAH is noteworthy. It features a corrosion-resistant stainless steel exterior that ensures longevity and maintains hygiene standards. The unit also has an insulated storage bin that holds up to 250 pounds of ice, making it an efficient solution for busy settings.

In summary, the Hoshizaki DKM-500BAH is a robust ice maker that combines high production capacity, advanced technology, and user-friendly features. Its build quality and efficient performance position it as a leader in the commercial ice-making market, making it an ideal investment for establishments requiring reliable ice supply.
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