Heatcraft H-IM-CU - User Manual

H-IM-CU February 2023 Part No. 25008101
H-IM-CU-0223 | Version 008
Condensing
Units
Installation and
Operations Manual
Table of Contents
General Safety Information..........................................................................2
Inspection ..........................................................................................................2
Warranty Statement .......................................................................................2
DOE Walk-In Cooler Freezer AWEF Set Points .......................................2
Space and Location Requirements ..........................................................3
Condensing Unit Rigging and Mounting ...............................................4
Remote and Water Cooled Condensing Units Requirements .........5
City & Tower Water Connections ................................................................ 5
Head Pressure Control ...................................................................................6
Phase Loss Monitor .........................................................................................7
Polyol Ester Lubricants ..................................................................................7
Refrigerant Piping ...........................................................................................8
Suction Lines .....................................................................................................8
Liquid Lines .......................................................................................................9
Unit Cooler Piping ...........................................................................................9
Line Sizing .................................................................................................10-17
Check System Pressure ...............................................................................18
Evacuation and Leak Detection .............................................................. 18
Refrigerant Charging Instructions .......................................................... 18
Refrigerant Flooding Charge ..............................................................19-22
Field Wiring ..................................................................................................... 23
Check Out and Start Up ............................................................................. 23
Operational Check Out ...............................................................................24
General Sequence of Operation .............................................................25
Refrigeration Cycle ....................................................................................... 25
Defrost Cycle .................................................................................................. 25
Copeland Demand Cooling ...................................................................... 25
Electric Defrost Troubleshooting ............................................................26
Variable Speed Motor with Orbus Controller ............................................ 26
System Troubleshooting Guide ............................................................... 28
Pressure Fan Cycling Recommended Settings ..................................29
InterLink™ Replacement Parts ........................................................................ 29
Preventive Maintenance Guidelines ......................................................30
Typical Wiring Diagrams ......................................................................31-35
Replaces February 2022

Heatcraft H-IM-CU Specifications