Lennox International Inc Merit CBX25UH Series installation instructions Table of Contents

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E2012 Lennox Industries Inc.

Dallas, Texas, USA

THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause personal injury, loss of life, or damage to property.

Installation and service must be performed by a licensed professional installer (or equivalent) or a service agency.

IMPORTANT

The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for noncompliance.

WARNING

The State of California has determined that this product may contain or produce a chemical or chemicals, in very low doses, which may cause serious illness or death. It may also cause cancer, birth defects, or reproductive harm.

INSTALLATION

INSTRUCTIONS

Merit® CBX25UH Series Units

AIR HANDLERS

506757-01 (0659371-80)

Litho U.S.A.

 

10/2012

 

Table of Contents

Shipping and Packing List . . . . . . . . . . . . . . . . . . . . . . 1

CBX25UH Series Units . . . . . . . . . . . . . . . . . . . . . . . . . 1

Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Duct System and Filters . . . . . . . . . . . . . . . . . . . . . . . . 7

Connecting Refrigerant Lines . . . . . . . . . . . . . . . . . . . 8

Sealing the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . 9

Airflow - Cooling Blower Speed . . . . . . . . . . . . . . . . . . 10

Check-Out Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 12

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Cabinet Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Shipping and Packing List

Package 1 of 1 contains the following:

1 - Assembled air handler unit for upflow or horizontal air discharge application (includes upflow and horizontal drain pans and pre-installed air filter).

Check equipment for shipping damage. If found, immediately report damage to the last carrier. Check the unit rating plate to confirm that delivered unit matches order.

General

The CBX25UH air handler is designed for indoor installation only. As shipped, the unit is ready for installation in either upflow, horizontal left-hand and right-hand air discharge applications. Electric heat, down flow air discharge application kits, air filters and other various accessories are available and listed in the CBX25UH Product Specification bulletin for ordering.

All units come with a factory installed check/expansion valve.

10/2012

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506757-01(0659371-80)

*2P102012**P506757-01*

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Contents Shipping and Packing List Table of ContentsGeneral AIR Flow CBX25UH Unit Dimensions inches mmRequirements Installation ClearancesRefrigerant Metering Device InstallationUpflow Application Horizontal ApplicationsRemove two screws securing the blow-off prevention RIGHT-HAND AIR DischargeOverflow Drain Line Condensate DrainDuct System and Filters Install Condensate DrainSloping the Drain Test Condensate DrainInstalling Duct System Connecting Refrigerant LinesSealing the Unit Volt Conversion Electrical ConnectionsChange Blower Speed Airflow Cooling Blower SpeedChanging Blower Speed Operation Check-out ProceduresRepairing Damaged Insulation MaintenanceCabinet Insulation Emergency Heat Heating Heat PumpStart-Up and Performance Checklist Upflow Configuration Start-Up and Performance Checklist Horizontal Configuration

Merit CBX25UH Series, Lennox Air Handler specifications

Lennox International Inc is a leading provider of innovative HVAC systems, and among its standout products is the Merit CBX25UH Series, an advanced air handler designed to enhance indoor comfort while ensuring energy efficiency. This series is specifically designed for use with the Lennox cooling and heating systems, making it an ideal choice for homeowners seeking versatile climate control solutions.

One of the primary features of the Merit CBX25UH Series is its multi-position installation capability, allowing it to be configured for upflow, downflow, or horizontal airflow. This flexibility makes it suitable for a wide range of home layouts and needs. The series is designed for use with a variety of Lennox outdoor units, ensuring seamless integration into existing HVAC systems.

The air handler is equipped with a high-efficiency blower motor that optimizes airflow, enhancing indoor comfort while minimizing energy consumption. This variable-speed blower motor not only operates quietly but also adjusts airflow based on the specific heating or cooling demands of the home. This feature significantly improves energy efficiency, helping homeowners save on utility bills while reducing their environmental impact.

Another key technology in the Merit CBX25UH Series is its SmartLynx™ communicating technology, which allows for efficient communication between the air handler and other HVAC components. This advanced communication ensures that the system operates at peak performance, providing consistent and reliable heating and cooling throughout the space.

The CBX25UH also boasts a durable cabinet that offers excellent insulation, minimizing energy loss and enhancing overall system efficiency. The cabinet's design reduces noise levels, contributing to a more peaceful indoor environment. Additionally, the air handler features a robust filtration system that helps maintain indoor air quality by capturing dust and allergens, ensuring a healthier living space.

Lastly, the Merit CBX25UH Series is backed by Lennox’s renowned reliability and quality. Homeowners can have peace of mind knowing they are investing in a product designed to deliver dependable performance for years to come. Overall, the Merit CBX25UH Series is a top choice for those seeking a powerful, efficient, and flexible air handling solution within their HVAC system.
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