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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-ChargeSwitch						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

Carrier 48XL installation instructions Of Contents, Turn to the Expertg, Limit Switch