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Installation Instructions
EQUIPMENT OPERATION HAZARD
OAT sensor must be field installed. See Accessory
Installation for more details.
EQUIPMENT OPERATION HAZARD
This Infinity TM unit is designed for use with an Infinity User
Interface.
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS ......................... 2
INTRODUCTION ................................... 2
RECEIVING AND INSTALLATION ................. 2-12
Check Equipment .................................. 2
Identify Unit .................................... 2
Inspect Shipment ................................. 2
Provide Unit Support ............................... 2
Roof Curb ...................................... 2
Slab Mount ..................................... 2
Ground Mount .................................. 2
Provide Clearances ................................. 7
Rig and Place Unit ................................. 7
Inspection ...................................... 8
Introduction ..................................... 8
Use of Rigging Bracket ............................ 8
Select and Install Ductwork ........................... 8
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units .......................... 9
Provide for Condensate Disposal ..................... 10
Install Flue Hood .................................. 10
Install Gas Piping ................................. 10
Install Electrical Connections ........................ 11
High-Voltage Connections ........................ 11
Routing Power Leads Into Unit ..................... 12
Connecting Ground Lead to Ground Screw ........... 12
Routing Control Power Wires ..................... 12
Accessory Installation ............................ 12
Special Procedures for 208-v Operation .............. 12
PRE-START-UP ................................... 15
START-UP ..................................... 15-26
Unit Start-Up and Troubleshooting ................... 15
Sequence of Operation .......................... 20-24
Check for Refrigerant Leaks ......................... 25
Start-Up Adjustments .............................. 25
Checking Cooling and Heating Control Operation ...... 25
Checking and Adjusting Refrigerant Charge ........... 25
A05307
Fig. 1 - Unit 48XL
Refrigerant Charge .............................. 26
No Charge ..................................... 26
Low Charge Cooling ............................. 26
To Use Cooling Charging Charts .................... 26
Non-Communicating Emergency Cooling/Heating Mode .. 26
MAINTENANCE ................................ 28-30
Air Filter ........................................ 28
Indoor Fan and Motor .............................. 28
Inducer Blower ................................... 28
Limit Switch ..................................... 28
Burner Ignition ................................... 28
Main Burners .................................... 28
Inducer Pressure Switch ............................ 28
Outdoor Coil, Indoor Coil, and Condensate Drain Pan ..... 29
Outdoor Fan ..................................... 29
Electrical Controls and Wiring ....................... 29
Refrigerant Circuit ................................. 29
Indoor Airflow ................................... 29
Pressure Switches ................................. 29
Loss-of-Charge Switch ............................ 28
High-Pressure Switches ............................ 29
Copeland Scroll Compressor (Puron cR)Refrigerant) ........ 30
Refrigerant System ................................ 30
Refrigerant .................................... 30
Compressor Oil ................................. 30
Servicing Systems on Roofs with Synthetic Materials .... 30
Liquid-Line Filter Drier .......................... 30
Puron (R-410A) Refrigerant Charging ............... 30
TROUBLESHOOTING ........................... 30-31
FINAL CHECKS ................................... 32
CARE AND MAINTENANCE ........................ 32
START-UP CHECKLIST ............................ 36
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