Carrier 24AHA4 Performance Series User Manual

Installation Instructions
24AHA4
Performance™ Series Air Conditioner
with Puronr Refrigerant
1-1/2 to 5 Nominal Tons
A07532
Fig. 1 - 24AHA4
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1........................
INSTALLATION 2−3.................................
Complete Pre−Installation Checks 2...................
Rig and Mount Unit 2..............................
Complete Refrigerant Piping Connections 3.............
Make Electrical Connections 3........................
START−UP 4........................................
SERVICE 4.........................................
MAINTENANCE 6...................................
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory−authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and
the current editions of the National Electrical Code (NEC)
NFPA70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. This is the safety−alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand
the signal words DANGER, WARNING, and CAUTION. These
words are used with the safety−alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify unsafe
practices which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental
pollution.
Remove and recycle all components or materials (i.e. oil,
refrigerant, etc.) before unit final disposal.
CAUTION
!

Carrier 24AHA4 Performance Series Specifications

General

Brand	Carrier
Model	24AHA4 Performance Series
Category	Air Conditioner
Language	English

Summary

SAFETY CONSIDERATIONS

ELECTRICAL SHOCK HAZARD

Warning about electrical shock hazard during installation and servicing.

ENVIRONMENTAL HAZARD

Caution regarding environmental pollution during unit disposal.

INSTALLATION

CUT HAZARD

Warning about sharp edges on sheet metal parts and protective gear.

UNIT OPERATION AND SAFETY HAZARD

Hazards related to Puron refrigerant systems and R-22 components.

PERSONAL INJURY AND EQUIPMENT DAMAGE HAZARD

Caution against operating the unit without a filter or with grille removed.

COMPLETE PRE-INSTALLATION CHECKS

Steps to check before installation, including unpacking and inspection.

RIG AND MOUNT UNIT

Instructions for mounting the unit on ground or roof.

Clearance Requirements

Specifies minimum clearances for single and multi-unit installations.

Rigging Safety

Warning to ensure unit panels are secure before rigging.

COMPLETE REFRIGERANT PIPING CONNECTIONS

UNIT DAMAGE HAZARD (Piping)

Hazards of burying refrigerant pipe and exceeding tubing length limits.

Filter Drier Installation

Instructions for installing the filter drier.

EXPLOSION HAZARD (Brazing)

Warning against using oxygen for leak testing or operating compressors.

Brazing Precautions

Precautions during brazing to prevent damage to service valves.

ELECTRICAL SHOCK HAZARD (Wiring)

Importance of proper grounding to prevent electrical shock.

Line Voltage and Phase Imbalance Hazards

Hazards of operating on improper line voltage or phase imbalance.

START-UP

Preliminary Checks

List of checks before starting the unit.

Evacuate and Dehydrate System

Steps for evacuating and dehydrating the system.

Charge System

Procedure for releasing refrigerant charge.

Starting the Unit

Instructions for starting the unit.

SERVICE

ELECTRICAL SHOCK HAZARD (Service)

Safety precautions before performing service.

High-Pressure Relief Valve

Explanation of the high-pressure relief valve function.

Internal Compressor Overload

Description of the compressor's internal overload protection.

Pumpdown Procedure

Procedure for pumping down the system for repairs.

System Vacuum Safety

Warning against opening the system to atmosphere under vacuum.

CAUTION (Unit Damage)

Refrigerant Overcharge Hazard

Hazards from overcharging refrigerant or sudden suction pressure rise.

Crankcase Heater Troubleshooting

PERSONAL INJURY HAZARD (Heater)

Caution for troubleshooting the crankcase heater due to live voltage.

Service Valve Information

Refrigerant Charging

Refrigerant Handling and Overcharging Warnings

Warnings about handling refrigerant and overcharging.

Service Valve Back-Seating

Importance of back-seating service valves to prevent charge loss.

Puron Refrigerant Specifics

Details on Puron refrigerant, cylinders, charging, and oil compatibility.

CHECK CHARGE

MAINTENANCE

ELECTRICAL SHOCK HAZARD (Maintenance)

Safety precautions before performing maintenance.

LUBRICATION

Information on compressor oil and lubrication.

CLEANING COILS

Instructions for cleaning the unit coils.