Carrier 48KLA - User Manual

Carrier Corporation • Syracuse, N Y 13221
Packaged Heating/Cooling Units
Note to Installer: After installation, leave these instructions, Owner’s Manual and Parts
Replacement Guide with equipment owner.
CONTENTS
Page
SAFETY CONSIDERATIONS. 1
GENERAL. 1 , 2
INSTALLATION. 2 -9
Step 1 — Rig and Place Unit. 2
• ROOFTOP INSTALLATION
• GROUND LEVEL INSTALLATION
• CLEARANCES
• CONDENSATE DISPOSAL
• VENTING
Step 2 — Make Gas Piping Connections . 5
Step 3 — Make Duct Connections. 6
Step 4 — Make Wiring Connections_ 7
• HIGH-VOLTAGE CONNECTIONS
• SPECIAL PROCEDURES FOR
208-V OPERATION
• LOW-VOLTAGE CONNECTIONS
• HEAT ANTICIPATOR SETTING
START-UP . 9-18
SERVICE . 1 8 - 21
TROUBLESHOOTING CHARTS .22,23
SAFETY CONSIDERATIONS
NOTE: Installation of this unit must conform to the
guidelines presented in these Installation Instruc¬
tions. Read and become familiar with this publica¬
tion before starting installation.
Only trained, qualified installers and service
mechanics should install, start-up and service this
equipment. Consult the Owner’s Manual for routine
maintenance. All other operations should be per¬
formed by trained service personnel.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging and setting bulky
equipment.
• Observe precautions in these instructions and on
equipment tags, stickers and labels.
Fig. 1 — Model 48KHA,KLA
GENERAL
Models 48KH A,KLA packaged gas/ electric units
(Fig. 1) are design certified in accordance with
ANSI Z21.47-1983, ARI Standard 210-81 and ARI
Standard 270-84. The units are design certified by
the American Gas Association (AGA) for use with
natural or propane gases with appropriate controls
and orifices. See Table 1 for heating input ratings.
Models 48KHA,KLA units are fully self-contained,
combination gas-heating/electric-cooling units
designed for outdoor installation on either a rooftop
or ground-level slab.
These units are equipped with an energy-saving
automatic, intermittent, electric spark ignition
system that does not have a continuously burning
pilot. All units are manufactured with natural gas
controls.
© Carrier Corporation 1984
Form 48KH,KL-9SI

Carrier 48KLA Specifications

General

Brand	Carrier
Model	48KLA
Category	Air Handlers
Language	English

Summary

INSTALLATION PROCEDURES

Gas Piping Connections

Detailed steps for making secure and safe gas supply piping connections to the unit.

Ductwork Connections

Guidance on properly connecting supply and return air ductwork for optimal airflow.

Electrical Wiring and High-Voltage Connections

Comprehensive instructions for electrical wiring, including high-voltage and 208V specific procedures.

Low-Voltage Wiring and Heat Anticipator

START-UP AND INITIAL OPERATION

Heating Section Start-Up and Gas Input Adjustment

Burner Air Shutter Adjustment Procedure

COOLING SECTION START-UP AND ADJUSTMENTS

Cooling Control System Verification

Refrigerant Charge Checking and Adjustment

Methods for verifying and adjusting the refrigerant charge for peak cooling efficiency.

PERIODIC SERVICE AND MAINTENANCE

Heating Section, Pilot, and Burner Servicing

Refrigerant System, Gas Input, and Airflow Checks

TROUBLESHOOTING HEATING ISSUES

Heating Service Analysis Chart

A diagnostic chart to identify and resolve common heating system problems.

TROUBLESHOOTING COOLING ISSUES

Cooling Service Analysis Chart

A diagnostic chart to identify and resolve common cooling system problems.