Carrier 48XL - Manual

48XL
Infinity
15 SEER Single-Packaged Air Conditioner and
Gas Furnace System With Puron® (R-410A) Refrigerant
Single Phase
2 to 5 Nominal Tons (Sizes 024-060) Turn to the Experts"
Installation Instructions
^ WARNING
EQUIPMENT OPERATION HAZARD
OAT sensor must be field installed. See Accessory
Installation for more details.
^ WARNING
EQUIPMENT OPERATION HAZARD
This Infinity ™ 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.............................................................................. 13
START-UP................................................................................. 13-26
Unit Start-Up and Troubleshooting ............................................ 13
Sequence of Operation ............................................................20-24
Check for Refrigerant Leaks.........................................................23
Start-Up Adjustments....................................................................23
Checking Cooling and Heating Control Operation ................. 23
Checking and Adjusting Refrigerant Charge........................... 23
A05307
Eig. 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® 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