Koolaire KR0270A Technician's Handbook

132 pages

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Part Number STH047 5/16

Undercounter Ice Machines

Technician’s Handbook

This manual is updated as new information and models

are released. Visit our website for the latest manual.

www.kool-aire.com

Safety Notices3
Table of Contents9
General Information13
- Model Numbers13
- How to Read a Model Number14
- Accessories14
  - Bin Caster14
  - Cleaner and Sanitizer14
- Model/Serial Number Location15
- Ice Machine Warranty Information15
Installation17
- Location of Ice Machine17
- Ice Machine Clearance Requirements18
- Ice Machine Heat of Rejection18
- Leveling the Ice Machine19
- Electrical Requirements20
- Voltage20
- Fuse/Circuit Breaker20
- Total Circuit Ampacity20
Air-Cooled Ice Machine21
Electrical Specifications21
Water-Cooled Ice Machines22
Water Service/Drains23
Water Supply23
Water Inlet Lines23
Drain Connections23
Connections24
Water Supply and Drain Line Sizing24
Cooling Tower Applications25
Component Identification27
Evaporator Compartment27
- Ice Machine Inspection29
- Exterior Cleaning29
- Cleaning the Condenser29
- Interior Cleaning and Sanitizing31
- Removal from Service/Winterization44
Operation47
- Initial Start-Up or Start-Up after Automatic47
- Shut-Off47
- Freeze Sequence47
- Harvest Sequence48
- Automatic Shut-Off48
- Energized Parts Chart49
- Operational Checks51
- Ice Thickness Adjustment53
Diagnosing an Ice Machine that will Not Run54
Troubleshooting54
Diagnosing Ice Thickness Control Circuitry55
Ice Production Check58
Installation and Visual Inspection Checklist60
Water System Checklist61
Ice Formation Pattern62
Safety Limit Feature64
Analyzing Discharge Pressure71
Analyzing Suction Pressure73
Harvest Valve77
Comparing Evaporator Inlet/Outlet81
Temperatures81
Discharge Line Temperature Analysis82
Refrigeration Component Diagnostic Chart84
Procedure85
Final Analysis86
Refrigeration Component Diagnostic Chart87
Ice Quality Is Poor - Cubes Are Shallow90
Incomplete or White90
Freeze Cycle Is Long, Low Ice Production91
Ice Machine Runs and no Ice Is Produced92
Component Check Procedures93
- Main Fuse93
- Bin Switch94
- Diagnosing Start Components97
  - Capacitor97
  - Relay97
- ON/OFF/WASH Toggle Switch98
- Ice Thickness Probe99
  - Ice Thickness Check100
- Compressor Electrical Diagnostics101
- Fan Cycle Control103
- High Pressure Cutout (HPCO) Control104
- Filter-Driers105
- Refrigerant Recovery/Evacuation106
  - Refrigerant Re-Use Policy107
  - Recovery and Recharging Procedures109
- System Contamination Cleanup112
Main Fuse121
Bin Switch121
ON/OFF/WASH Toggle Switch121
Fan Control Cycle121
High Pressure Cutout (HPCO) Control121
Filter-Driers121
Total System Refrigerant Charge122
Cycle Times, 24 Hr. Ice Production and Refrigerant Pressure Charts123
- K170 Self-Contained Air-Cooled124
- K270 Self-Contained Air-Cooled125
- K270 Self-Contained Water-Cooled126
Wiring Diagrams127
- K170 / K270 Wiring Diagram128
- Electronic Control Boards130
- K170/K270 Tubing Schematic131

Brand	Koolaire
Model	KR0270A
Category	Ice Maker
Language	English

Koolaire KR0270A Technician's Handbook

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