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Manitowoc QY0324A

Manitowoc QY0324A
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ICE MACHINES
Q
-Mode
l
Service Manual
Service Manual
Service Manual
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2004 Manitowoc Ice, Inc.
80-1597-3
6/04

Table of Contents

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Manitowoc QY0324A Specifications

General IconGeneral
ModelQY0324A
Width30 inches
Voltage115V
Power Supply115V/60Hz/1Ph
Condenser TypeAir Cooled
TypeModular
Ice StorageNot included
Water Connection3/8 inch FPT
RefrigerantR-404A

Summary

Safety Notices

Safety Notices

Overview of safety notices used in the manual.

PERSONAL INJURY POTENTIAL

Warning about operating damaged or altered equipment.

Procedural Notices

Procedural Notices

Overview of procedural notices for helpful information.

Important

Provides useful extra information for procedures.

Section 1 General Information

Model Numbers

Covers model identification and series.

Warranty Coverage

Outlines warranty terms, parts, labor, and exclusions.

Section 2 Installation Instructions

Ice Machine Dimensions

Provides physical dimensions for various ice machine models.

Electrical Service

Covers voltage, fuse/breaker, and ampacity requirements.

Water Supply and Drain Requirements

Guidelines for water supply and drain connections.

Remote CondenserLine Set Installation

Procedures for installing remote condensers and line sets.

Section 3 Maintenance

Operational Checks

Procedures for routine checks like water level and ice thickness.

Cleaning the Condenser

Steps for cleaning air-cooled and water-cooled condensers.

Interior Cleaning and Sanitizing

Guidelines for cleaning and sanitizing the ice machine interior.

Water TreatmentFiltration

Information on water treatment systems and filter replacement.

Section 4 Ice Machine Sequence of Operation

Self-Contained Air- and Water-Cooled

Details operational sequence for self-contained models.

Remote

Details operational sequence for remote models.

Section 5 Water System Ice Making Sequence of Operation

Initial Start-Up or Start-Up After Automatic Shut-Off

Describes initial water system startup.

Freeze Cycle

Explains water flow and valve operation during the freeze cycle.

Section 6 Electrical System

Energized Parts Charts

Tables showing component status during operational sequences.

Wiring Diagram Sequence of Operation

Explains wiring diagrams for various operational sequences.

Component Specifications and Diagnostics

Details specs and diagnostic procedures for key electrical components.

Section 6 Electrical System (Cont.)

Ice Thickness Probe (Harvest Initiation)

Explains probe function, freeze lock-in, and checks.

Water Level Control Circuitry

Explains water level probe and valve control.

Section 7 Refrigeration System

Sequence of Operation

Details refrigeration cycles for self-contained and remote models.

Operational Analysis (Diagnostics)

Guides on analyzing refrigeration system problems.

Before Beginning Service

Questions to ask and initial checks before service.

Section 7 Refrigeration System (Cont.)

Refrigerant RecoveryEvacuation and Recharging

Procedures for recovering, evacuating, and recharging refrigerant.

Self-Contained Charging Procedures

Steps for properly charging self-contained ice machines.

Remote Charging Procedures

Steps for properly charging remote ice machines.

Section 7 Refrigeration System (Cont.)

System Contamination Clean-Up

Requirements for restoring contaminated refrigeration systems.

Mild System Contamination Cleanup Procedure

Steps for cleaning systems with mild contamination.

Section 7 Refrigeration System (Cont.)

Severe System Contamination Cleanup Procedure

Steps for cleaning systems with severe contamination.

Replacing Pressure Controls Without Removing Refrigerant Charge

Procedure to replace controls without discharging refrigerant.

Section 7 Refrigeration System (Cont.)

Filter-Driers

Information on filter-drier types and replacement.

Total System Refrigerant Charges

Table of refrigerant charge amounts for various models.

Section 7 Refrigeration System (Cont.)

Refrigerant Definitions

Explains terms like recover, recycle, reclaim, and new product specs.

Section 7 Refrigeration System (Cont.)

Refrigerant Re-Use Policy

Manitowoc's policy on refrigerant reuse and approved types.

Section 7 Refrigeration System (Cont.)

HFC REFRIGERANT QUESTIONS AND ANSWERS

Q&A regarding HFC refrigerants and POE oils.

Section 7 Refrigeration System (Cont.)

PTCR DIAGNOSTICS

Explains PTCR function and troubleshooting.

Troubleshooting PTCRs

Details common PTCR failure modes and causes.

Section 7 Refrigeration System (Cont.)

CHECKING THE PTCR

Procedure to test PTCR resistance and inspect for damage.

Section 7 Refrigeration System (Cont.)

Analyzing Discharge Pressure During Freeze or Harvest Cycle

Procedure to analyze discharge pressure readings.

Section 7 Refrigeration System (Cont.)

Analyzing Suction Pressure During Freeze Cycle

Procedure to analyze suction pressure readings.

Section 7 Refrigeration System (Cont.)

SINGLE EXPANSION VALVE ICE MACHINES - COMPARING EVAPORATOR INLET AND OUTLET TEMPERATURES

Procedure to compare evaporator temperatures for diagnosis.

Section 7 Refrigeration System (Cont.)

HARVEST VALVE TEMPERATURE CHECK

Procedure to check harvest valve temperature for leaks.

Section 7 Refrigeration System (Cont.)

DISCHARGE LINE TEMPERATURE ANALYSIS

Procedure to analyze discharge line temperature readings.

Section 7 Refrigeration System (Cont.)

SAFETY LIMITS

Explains built-in safety limits and their indications.

Section 7 Refrigeration System (Cont.)

Analyzing Why Safety Limits May Stop the Ice Machine

Explains how safety limits prevent component damage.

Section 7 Refrigeration System (Cont.)

Safety Limit #1

Details conditions and indicators for Safety Limit #1.

Safety Limit #2

Details conditions and indicators for Safety Limit #2.

Section 7 Refrigeration System (Cont.)

HARVEST PRESSURE REGULATING (H.P.R.) SYSTEM

Explains the H.P.R. system for remote models.

Section 7 Refrigeration System (Cont.)

HPR DIAGNOSTICS

Diagnostic steps for the H.P.R. system.

Section 7 Refrigeration System (Cont.)

HEADMASTER CONTROL VALVE

Explains operation and diagnosis of the headmaster control valve.

Section 7 Refrigeration System (Cont.)

LOW ON CHARGE VERIFICATION

Procedure to check for low refrigerant charge.

FAN CYCLE CONTROL VS. HEADMASTER

Compares fan cycle control and headmaster function.

Section 7 Refrigeration System (Cont.)

Pressure Control Specifications and Diagnostics

Specs and diagnostics for fan cycle and HPCO controls.

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