48HJ004---007 48HE003---006

Single---Package Rooftop Heating/Cooling Standard and Low NOx Units

Installation Instructions

CONTENTS

 

 

Page

SAFETY CONSIDERATIONS

. . 1

INSTALLATION

. 1

Step 1-Provide Unit Support

. . 2

ROOF CURB

. . 2

SLAB MOUNT

. . 2

ALTERNATE UNIT SUPPORT

. . 2

Step 2-Field Fabricate Ductwork

. 2

Step 3-Install External Trap for Condensate Drain

. . 2

Step 4-Rig and Place Unit

. . 2

POSITIONING

. . 4

Step 5 — Install Flue Hood

. . 4

Step 6 — Install Gas Piping

. . 4

Step 7 — Make Electrical Connections

. . 8

FIELD POWER SUPPLY

. . 8

FIELD CONTROL WIRING

. . 8

HEAT ANTICIPATOR SETTINGS

. . 8

Step 8 — Adjust Factory-Installed Options

. 17

COBRAENERGY RECOVERY UNITS

. 17

HUMIDI-MIZERADAPTIVE

 

DEHUMIDIFICATION SYSTEM

. 17

MANUAL OUTDOOR-AIR DAMPER

. 17

CONVENIENCE OUTLET

. 17

NOVAR CONTROLS

. 17

PREMIERLINKCONTROL

. 19

OPTIONAL ECONOMI$ER IV AND

 

ECONOMI$ER2

. 22

ECONOMI$ER IV STANDARD SENSORS

. 23

ECONOMI$ER IV CONTROL MODES

. 24

Step 9 — Adjust Evaporator-Fan Speed

. 29

PRE-START-UP

. 45

START-UP

. 45

SERVICE

. 50

TROUBLESHOOTING

. 58

START-UP CHECKLIST

. 63

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.

Recognize safety information. This is the safety-alert symbol

. When you see this symbol on the furnace 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 a hazard 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 cause personal injury or death.

Before performing service or maintenance operations on unit, turn off main power switch to unit and install lockout tag. Ensure electrical service to rooftop unit agrees with voltage and amperage listed on the unit rating plate.

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Carrier 48HJ004---007, 48HE003---006 installation instructions Installation Instructions, Electrical Shock Hazard

48HJ004---007, 48HE003---006 specifications

Carrier has long been a trusted name in the HVAC industry, and its models 48HJ004---007 and 48HE003---006 continue that legacy, offering efficient, reliable climate control solutions. These models are designed for different applications, ensuring optimal performance in a variety of environments.

The 48HJ series features advanced rooftop units that are ideal for commercial settings. They come equipped with high-efficiency scroll compressors that provide superior cooling and heating capabilities. This series is noted for its compact design, allowing for easy installation on rooftops or other constrained spaces. The units offer variable capacity operation, which enables them to efficiently meet varying heating and cooling demands without unnecessary energy consumption.

One of the standout features of the 48HJ series is its use of advanced microprocessor controls. This technology allows for precise temperature management and system diagnostics, enhancing the ease of operation while ensuring maximum comfort. Additionally, the series supports advanced connectivity options, enabling integration with building management systems. This allows for remote monitoring and control, making it easier for facility managers to keep track of performance and energy usage.

On the other hand, the 48HE series specializes in high-efficiency heating and cooling performance. These units are designed for larger commercial spaces and come with robust features for enhanced durability and efficiency. Like the 48HJ series, the 48HE models utilize scroll compressors and are equipped with a high-efficiency fan setup for improved airflow and reduced noise levels.

The 48HE also includes an innovative heat pump option, which allows the system to reverse the cooling process to provide heating, making it versatile across different seasonal demands. Both series are designed with eco-friendly refrigerants that comply with the latest environmental regulations, ensuring a minimized ecological footprint.

In terms of energy efficiency, both the 48HJ and 48HE series hold impressive SEER and EER ratings, contributing to reduced operational costs over time. The units are also built with durable, corrosion-resistant materials, ensuring longevity and low maintenance needs.

In conclusion, Carrier 48HJ004---007 and 48HE003---006 models are designed with cutting-edge technology, energy efficiency, and flexibility in mind. Their robust features make them ideal choices for commercial applications, providing reliable comfort and operational excellence. Whether for cooling or heating, these systems stand out in performance and sustainability, earning Carrier's reputation as a leader in the HVAC market.