TABLE OF CONTENTS
1 Product Description 1
1.1 Prop Fan Condensing Units 1
1.1.1 Base System 95°F (35°C) Ambient Models 1
1.1.2 105°F (41°C) Ambient Models 1
1.1.3 Liebert Quiet-Line™ Models 1
1.2 Optional Equipment 2
1.2.1 Coated Coil 2
1.2.2 Refrigerant Line Sweat Adapter Kit 2
1.2.3 277V Step-Down Transformer 2
2 Installation 3
2.1 Equipment Inspection 3
2.2 Location Considerations 3
2.3 Dimensional Data 4
2.4 Piping and Electrical Connections 7
2.5 Piping Considerations 14
2.5.1 Piping for Elevation Differences between PFH and Evaporator 15
2.5.2 Pre-Charged Line Sets 17
2.5.3 Field-Fabricated Line Sets 17
2.5.4 Installation of Piping to Units 19
2.5.5 R-407C PFH Installed as a Replacement Condensing Unit in an R-22 System 20
2.5.6 General System Charge Requirements 21
2.6 Electrical Connections 22
2.6.1 Low-Voltage Control Wire Connections 23
2.6.2 Low-Voltage Control Wire Sizing 23
2.7 Electrical Data 24
2.8 Checklist for Completed Installation 26
3 Operation 29
3.1 Compressor 29
3.2 High Head Pressure 29
3.3 Liebert® Lee-Temp™ Flood Back Head Pressure Control 29
3.4 Hot Gas Bypass 30
3.4.1 Operation 30
3.4.2 Adjustment 30
4 Maintenance 33
4.1 General 33
4.2 Compressor Failure 33
4.2.1 Electrical Failure—Burnout 33
4.2.2 Mechanical Failure 34
4.3 Compressor Replacement 34
4.4 Field Charge Verification 35
Vertiv | Liebert PFH Installer/User Guide | i
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