Hoshizaki DCM-750BAH-OS, DCM-750BWH-OS service manual Water System, Cleaning Solution

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1. Water System

a)Cleaning Solution

Dilute 9.6 fl. oz. (0.29 l) of recommended cleaner, Hoshizaki "Scale Away" or "LIME-A- WAY" (Economics Laboratory, Inc.), with 1.6 gal. (6.0 l) of warm water.

b)Cleaning Procedure

1)Close the water supply line shut-off valve.

2)Move the dispense mode switch to the "CONTINUOUS" position, then dispense all of the ice from the storage bin.

3)Move the control switch to the "DRAIN" position and allow the water system to drain for 5 minutes.

Note: If the unit is running, the drain valve will not open until 2.5 minutes after the control switch is moved to the "DRAIN" position. This allows the components to cycle down.

4)Move the control switch to the "OFF" position, then turn off the power supply. Remove the front and top panels, then move the power switch to the "OFF" position.

5)Remove the front cover of the storage bin. Remove spout B, then remove spout A. See Fig. 6.

6)Pour the cleaning solution over the extruding head until the evaporator assembly and the reservoir are full and the solution starts to overflow into the drain pan.

Note: If there is excess scale on the extruding head, fill the evaporator assembly and reservoir as described above, then use a clamp on the reservoir hose between the reservoir and evaporator assembly to block flow. Pour additional cleaning fluid over the extruding head until the evaporator assembly is completely full.

7)Replace spout A, spout B, and the front cover of the storage bin in their correct positions.

8)Allow the icemaker to sit for about 10 minutes before operation. If you placed a clamp on the reservoir hose in step 6, remove it before operation.

9)Move the power switch to the "ON" position and replace the panels in their correct positions. Turn on the power supply, then move the control switch to the "ICE" position. Make ice using the solution until the icemaker stops making ice.

Note: This unit will not run without the front panel in position.

10)Move the control switch to the "DRAIN" position and allow the solution to drain for 5 minutes.

11)Move the control switch to the "ICE" position. Open the water supply line shut-off valve to supply water to the reservoir.

12)After the gear motor starts, move the control switch to the "DRAIN" position and allow the water system to drain for 5 minutes.

Note: If you do not sanitize the unit, move the control switch to the "ICE" position after the water system drains. Allow the icemaker to run for about 30 minutes, then move the control switch to the "OFF" position. Turn off the power supply, then remove the front panel and front cover of the storage bin. Go to step 12 in "VI. A.2.c) Cleaning and Sanitizing Procedure."

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Contents DCM-750BAH DCM-750BAH-OS DCM-750BWH DCM-750BWH-OS Hoshizaki AMERICA, INC Contents Page Specifications Icemaker DCM-750BAHDCM-750BAH-OS Water TEMP. FDCM-750BWH Potable Water WATER-COOLED CondenserDCM-750BWH-OS Potable Water Water Cooled CondenserII. General Information Construction DCM-750BWH-OS Ice Making Unit Sequence of Operation Startup Control Board Control Board Layout DCM-750BAH, DCM-750BWH Control BoardDCM-750BAH-OS, DCM-750BWH-OS Features LED LightsControls and Adjustments Portion Control Control Board Check ProcedurePower Supply Ice Making ComponentsDispensing Components DCM-750BAH, DCM-750BWH Float Switch Inlet Water Valve DCM-750BWH-OS Wiring Diagrams Wire Color CodeDCM-750BAH-OS, DCM-750BWH-OS Sequence of Electrical Circuit Ice Making DCM-750BWH-OSIce Purge Cycle Orange WHITE/BLACK Pink WHITE/BROWN RED WHITE/BLUE Violet Hour Drain Cycle / Drain Switch Shutdown Low Water Safety High Pressure Switch Sequence of Electrical Circuit Dispensing Continuous DispensePortion Dispense Performance Data 192Approximate IV. Service Diagnosis Diagnostic Procedure Ice Production Check Diagnostic Charts No Ice ProductionProblem Possible Cause Remedy Problem Possible Cause Remedy Low Ice Production Other Dispensing Opti Serve OS Sensors 5b. Ice Dispensing Portion Mode 5a. Ice Dispensing Continuous Mode5c. Water Dispensing Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery BrazingEvacuation and Recharge R-404A Removal and Replacement of Compressor Removal and Replacement of Expansion Valve Removal and Replacement of Evaporator Assembly Components Removal and Replacement of Extruding Head Upper Bearing Wear CheckRemoval and Replacement of Auger Removal and Replacement of EvaporatorPage 5b. Lower Housing Removal and Replacement of Gear Motor Page Removal and Replacement of Water-Cooled Condenser Page Adjustment of Water Regulating Valve Water-Cooled Model Only Removal and Replacement of Fan MotorRemoval and Replacement of Inlet or Dispensing Water Valve Removal and Replacement of Drain ValveDispensing Auger and Agitator Removal and Replacement of Dispensing SystemDispensing or Agitating Motor Page VI. Cleaning and Maintenance Cleaning and Sanitizing InstructionsCleaning Solution Water SystemSanitizing Solution Dispensing ComponentsBin Control Bracket Snap Pin Maintenance Frequency Area TaskPreparing the Icemaker for Long Storage