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50CR
Infinityt Single--Packaged Heat Pump Units
With Puron
®
(R--410A) Refrigerant
Sizes 024--060
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: Installer: Make sure the Owner’s Manual and Service
Instructions are left with the unit after installation.
TABLE OF CONTENTS
Page
SAFETY CONSIDERATIONS 2........................
INTRODUCTION 2..................................
RECEIVING AND INSTALLATION 2--16................
Check Equipment 2.................................
Identify Unit 2...................................
Inspect Shipment 2................................
Provide Unit Support 2..............................
Roof Curb 2.....................................
Slab Mount 2....................................
Ground Mount 2.................................
Provide Clearances 2................................
Rig and Place Unit 7................................
Inspection 7.....................................
Introduction 7....................................
Use of Rigging Bracket 7...........................
Select and Install Ductwork 9..........................
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units 9.........................
Provide for Condensate Disposal 9.....................
Install Electrical Connections 11.......................
High--Voltage Connections 11.......................
Routing Power Leads Into Unit 11....................
Connecting Ground Lead to Ground Screw 11..........
Routing Control Wires 11..........................
Accessory Installation 16...........................
Special Procedures for 208--v Operation 16.............
PRE--START --UP 17..................................
START--UP 17.......................................
Unit Start--Up 17--23................................
Sequence of Operation 20............................
Check for Refrigerant Leaks 20........................
Start--Up Adjustments 20.............................
Checking Cooling and Heating Control Operation 20.....
Checking and Adjusting Refrigerant Charge 22..........
Refrigerant Charge 22.............................
No Charge 22....................................
Low Charge Cooling 22............................
To Use Cooling Charging Charts 22...................
Indoor Airflow and Airflow Adjustments 22............
Defrost Control 22..................................
Quiet Shift 22....................................
Defrost 22......................................
Emergency Heat/Cool Mode 22........................
A05307
Fig. 1 -- Unit 50CR
MAINTENANCE 24 -- 28...............................
Air Filter 25.......................................
Indoor Blower and Motor 25..........................
Outdoor Coil, Indoor Coil, and Condensate Drain Pan 25....
Outdoor Fan 25....................................
Electrical Controls and Wiring 26......................
Refrigerant Circuit 26................................
Indoor Airflow 26..................................
Metering Devices–TXV & AccuRater
®
Piston 26..........
Pressure Switches 26................................
L o s s -- o f -- C h a r g e S w i t c h 2 7...........................
High-- Pressure Switch 27.............................
Copeland Scroll Compressor (Puron
®
Refrigerant) 27.......
Refrigerant System 27...............................
Refrigerant 27...................................
Compressor Oil 27................................
Servicing Systems on Roofs with Synthetic Materials 27...
Liquid--Line Filter Drier 28.........................
Puron (R--410A) Refrigerant Charging 28..............
System Information 28...............................
L o s s -- o f -- C h a r g e S w i t c h 2 8.........................
Check Defrost Thermostat 28........................
TROUBLESHOOTING 28.............................
START--UP CHECKLIST 28...........................