Manitowoc QY1894N

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Section 7 Refrigeration System

Part No. 80-1100-3 7-23

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Default Chapter5
- Table of Contents5
Model Numbers11
- Ice Cube Sizes11
Ice Cube Sizes12
How to Read a Model Number12
Model/Serial Number Location12
Warranty Coverage13
- General15
- Q200 – Q1000 Ice Machines16
Ice Machine Dimensions17
- Q1300/Q1600/Q1800 Ice Machines (Cont.)17
Ice Storage bin Dimensions18
- S970 Ice Storage Bins18
Remote Condenser Dimensions18
Location of Ice Machine19
Ice Machine Heat of Rejection20
Stacking Two Ice Machines on a Single Storage bin20
Leveling the Ice Storage bin20
Air-Cooled Baffle21
Electrical Service21
Section 222
Installation Instructions22
Self-Contained Electrical Wiring Connections23
Remote Electrical Wiring Connections24
- Remote Ice Machine with Single Circuit Model Condenser 115/1/60 or 208-230/1/6024
- Remote Ice Machine24
- With Single Circuit Model Condenser24
- Remote Ice Machine with Single Circuit Model Condenser 230/1/5024
Water Supply and Drain Requirements25
- Water Supply25
- Water Inlet Lines25
- Drain Connections25
Cooling Tower Applications (Water-Cooled Models)25
- Water Supply and Drain Line Sizing/Connections26
Remote Condenser/Line Set Installation27
- Remote Ice Machines Refrigerant Charge27
- General28
- Guidelines for Routing Line Sets28
- Calculating Remote Condenser Installation Distances29
- Lengthening or Reducing Line Set Lengths30
- Connecting a Line Set30
- Remote Receiver Service Valve30
Remote Ice Machine Usage with Non-Manitowoc Multi-Circuit Condensers31
- Warranty31
- Head Pressure Control Valve31
- Fan Motor31
- Internal Condenser Volume31
- Condenser DT31
- Refrigerant Charge31
- Quick Connect Fittings31
- Non-Manitowoc Multi-Circuit Condenser Sizing Chart32
Installation Check List33
Additional Checks for Remote Models33
Maintenance35
Section 335
Component Identification35
Operational Checks36
- General36
- Water Level36
- Ice Thickness Check36
- Harvest Sequence Water Purge37
Cleaning the Condenser37
- Air-Cooled Condenser37
- Water-Cooled Condenser and Water Regulating Valve38
Interior Cleaning and Sanitizing39
- General39
- Manitowoc's Patented Cleaning or Sanitizing Technology39
- Cleaning Procedure40
- Sanitizing Procedure41
- Automatic Cleaning System (Aucs")42
- Removal of Parts for Cleaning/Sanitizing43
Water Treatment/Filtration48
- General48
- Filter Replacement Procedure48
Removal from Service/Winterization49
- General49
- Self-Contained Air-Cooled Ice Machines49
- Water-Cooled Ice Machines49
- Remote Ice Machines49
- Aucs" Accessory49
Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800 . 4-151
Self-Contained Air- and Water-Cooled51
- Initial Start-Up or Start-Up after Automatic Shut-Off51
- Freeze Sequence51
- Harvest Sequence52
- Automatic Shut-Off52
Remote53
Q450/Q600/Q800/Q1000/Q1300/Q1600/Q180053
- Initial Start-Up or Start-Up after Automatic Shut-Off53
- Freeze Sequence53
- Remote Q450/Q600/Q800/Q1000/Q1300/Q1600/Q180053
- Harvest Sequence54
- Automatic Shut-Off54
- Initial Start-Up or Start-Up after Automatic Shut-Off55
- Freeze Cycle55
- Water Inlet Valve Safety Shut-Off55
- Harvest Cycle56
- Automatic Shut-Off56
Energized Parts Charts57
- Self-Contained Air- and Water-Cooled Models57
- Initial Start-Up or Start-Up after Automatic Shut-Off57
- Remote Models58
- Initial Start-Up or Start-Up after Automatic Shut-Off59
Wiring Diagram Sequence of Operation59
- Self-Contained Models59
Wiring Diagrams73
- Wiring Diagram Legend73
- Q200/Q280/Q320 - Self Contained - 1 Phase with Terminal Board74
- Q280/Q370 - Self Contained - 1 Phase Without Terminal Board75
- Q320 - Self Contained - 1 Phase Without Terminal Board76
- Q420/Q450/Q600/Q800/Q1000 - Self Contained77
- Phase with Terminal Board77
- Q420/Q450/Q600/Q800/Q1000 - Self Contained78
- Phase Without Terminal Board78
- Q800/Q1000 - Self Contained - 3 Phase with Terminal Board79
- Q800/Q1000 - Self Contained - 3 Phase Without Terminal Board80
- Q1300/Q1800 - Self Contained - 1 Phase with Terminal Board81
- Q1300/Q1600/Q1800 - Self Contained - 1 Phase Without Terminal Board82
- Q1300/Q1800 - Self Contained - 3 Phase with Terminal Board83
- Q1300/Q1600/Q1800 - Self Contained - 3 Phase Without Terminal Board84
- Q450/Q600/Q800/Q1000 - Remote - 1 Phase with Terminal Board85
- Q450/Q600/Q800/Q1000 - Remote - 1 Phase Without Terminal Board86
- Q800/Q1000 -Remote - 3 Phase with Terminal Board87
- Q800/Q1000 -Remote - 3 Phase Without Terminal Board88
- Q1300/Q1800 - Remote - 1 Phase with Terminal Board89
- Q1300/Q1600/Q1800 - Remote - 1 Phase Without Terminal Board90
- Q1300/Q1800 - Remote - 3 Phase with Terminal Board91
- Q1300/Q1600/Q1800 - Remote - 3 Phase Without Terminal Board92
Component Specifications and Diagnostics94
- Main Fuse94
- Bin Switch94
- Compressor Electrical Diagnostics96
- PTCR Diagnostics97
- ICE/OFF/CLEAN Toggle Switch100
- Control Board Relays100
- Electronic Control Board101
Ice Thickness Probe (Harvest Initiation)103
- How the Probe Works103
- Harvest/Safety Limit Light103
- Freeze Time Lock-In Feature103
- Maximum Freeze Time103
- Ice Thickness Check103
- Diagnosing Ice Thickness Control Circuitry104
Water Level Control Circuitry106
- Water Level Probe Light106
- Water Inlet Valve Safety Shut-Off106
- Freeze Cycle Circuitry106
- Harvest Cycle Circuitry106
- Diagnosing Freeze Cycle Potable Water Level Control Circuitry107
Diagnosing an Ice Machine that will Not Run110
Section 7113
Refrigeration System113
Sequence of Operation113
- Self-Contained Air or Water -Cooled Models113
- Remote Models115
- Q1300/Q1600/Q1800 Refrigeration Tubing Schematics118
Operational Analysis (Diagnostics)120
- General120
- Before Beginning Service121
- Ice Production Check121
- Installation/Visual Inspection Checklist122
- Water System Checklist122
- Ice Formation Pattern123
- Safety Limits125
- Analyzing Discharge Pressure During Freeze or Harvest Cycle129
- Analyzing Suction Pressure During Freeze Cycle130
- Single Expansion Valve Ice Machines - Comparing Evaporator Inlet and Outlet Temperatures132
- Harvest Valve Temperature Check133
- Discharge Line Temperature Analysis134
- How to Use the Refrigeration System Operational Analysis Tables136
- Refrigeration System Operational Analysis Tables137
- Harvest Pressure Regulating (H.P.R.) System139
- Headmaster Control Valve142
Pressure Control Specifications and Diagnostics144
- Fan Cycle Control144
- High Pressure Cut-Out (HPCO) Control144
Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts145
- Q200 Series145
- Q280 Series146
- Q320 Series147
- Q370 Series148
- Q420/450 Series149
- Q450 Series150
- Q600 Series150
- Q800 Series152
- Q1000 Series153
- Q1300 Series155
- Q1600 Series156
- Q1800 Series157
Refrigerant Recovery/Evacuation and Recharging159
- Normal Self-Contained Model Procedures159
- Normal Remote Model Procedures161
- System Contamination Clean-Up165
- Replacing Pressure Controls Without Removing Refrigerant Charge167
- Filter-Driers169
- Total System Refrigerant Charges169
- Refrigerant Definitions170
- Refrigerant Re-Use Policy171
- HFC Refrigerant Questions and Answers172

Manitowoc QY1894N - Page 135

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