Hoshizaki DCM-750BWH-OS User Manuals

Table of Contents

• I. Specifications

  5
  • A. Icemaker

    5
    • 1. DCM-750BAH

      5
    • 2. DCM-750BAH-OS

      6
    • 3. DCM-750BWH

      7
    • 4. DCM-750BWH-OS

      8
• II. General Information

  9
  • A. Construction

    9
  • B. Ice Making Unit

    11
  • C. Sequence of Operation

    12
    • 1. Fill Cycle

      12
    • 2. Ice Purge Cycle (60 seconds)

      12
    • 3. Freeze Cycle

      12
    • 4. Drain Cycle

      12
    • 5. Shutdown

      12
  • D. Control Board

    14
    • 1. Control Board Layout

      15
      • a) DCM-750BAH, DCM-750BWH

        15
      • b) DCM-750BAH-OS, DCM-750BWH-OS

        16
    • 2. Features

      17
    • 3. Controls and Adjustments

      18
    • 4. Control Board Check Procedure

      18
  • E. Float Switch

    20
• III. Technical Information

  21
  • A. Water Circuit and Refrigeration Circuit

    21
  • B. Wiring Diagrams

    23
    • 1. DCM-750BAH, DCM-750BWH

      23
    • 2. DCM-750BAH-OS, DCM-750BWH-OS

      24
  • C. Sequence of Electrical Circuit – Ice Making

    25
    • 1. Fill Cycle

      25
    • 2. Ice Purge Cycle

      26
    • 3. Freeze Cycle

      27
    • 4. 12 Hour Drain Cycle / Drain Switch

      28
    • 5. Shutdown

      29
    • 6. Low Water Safety

      30
    • 7. High Pressure Switch

      31
  • D. Sequence of Electrical Circuit – Dispensing

    32
    • 1. Continuous Dispense

      32
    • 2. Portion Dispense

      33
  • E. Performance Data

    34
    • 1. DCM-750BAH(-OS)

      34
    • 2. DCM-750BWH(-OS)

      35
• IV. Service Diagnosis

  36
  • A. Diagnostic Procedure

    36
  • B. Ice Production Check

    37
  • C. Diagnostic Charts

    38
    • 1. No Ice Production

      38
    • 2. Low Ice Production

      41
    • 3. Other

      42
    • 4. Dispensing

      43
    • 5. Opti Serve (OS) Sensors

      44
• V. Removal and Replacement of Components

  46
  • A. Service for Refrigerant Lines

    46
    • 1. Refrigerant Recovery

      46
    • 2. Brazing

      46
    • 3. Evacuation and Recharge (R-404A)

      47
  • B. Removal and Replacement of Compressor

    48
  • C. Removal and Replacement of Expansion Valve

    49
  • D. Removal and Replacement of Evaporator Assembly Components

    50
    • 1. Upper Bearing Wear Check

      51
    • 2. Removal and Replacement of Extruding Head

      51
    • 3. Removal and Replacement of Auger

      52
    • 4. Removal and Replacement of Evaporator

      52
    • 5. Removal and Replacement of Mechanical Seal and Lower Housing

      54
    • 6. Removal and Replacement of Gear Motor

      55
  • E. Removal and Replacement of Self-Contained Air-Cooled Condenser

    56
  • F. Removal and Replacement of Water-Cooled Condenser

    57
  • G. Removal and Replacement of Water Regulating Valve ‑ Water‑Cooled Model Only

    58
  • H. Adjustment of Water Regulating Valve - Water-Cooled Model Only

    59
  • I. Removal and Replacement of Fan Motor

    59
  • J. Removal and Replacement of Inlet or Dispensing Water Valve

    60
  • K. Removal and Replacement of Drain Valve

    60
  • L. Removal and Replacement of Dispensing System

    61
    • 1. Dispensing Auger and Agitator

      61
    • 2. Dispensing or Agitating Motor

      61
• VI. Cleaning and Maintenance

  63
  • A. Cleaning and Sanitizing Instructions

    63
    • 1. Water System

      64
      • a) Cleaning Solution

        64
      • b) Cleaning Procedure

        64
      • c) Sanitizing Solution

        65
      • d) Sanitizing Procedure - Following Cleaning Procedure

        65
    • 2. Dispensing Components

      65
      • a) Cleaning Solution

        65
      • b) Sanitizing Solution

        65
      • c) Cleaning and Sanitizing Procedure

        65
  • B. Maintenance

    67
  • C. Preparing the Icemaker for Long Storage

    68