Lennox International Inc Merit CBX25UH Series Electrical Connections, Volt Conversion

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Electrical Connections

WARNING

Electric shock hazard! - Disconnect all power supplies before servicing.

Replace all parts and panels before op­ erating.

Failure to do so can result in death or elec­ trical shock.

WARNING

Electric Shock Hazard.

Can cause injury or death.

Foil‐faced insulation has conductive characteristics sim­ ilar to metal. Be sure there are no electrical connections within a ½” of the insulation. If the foil‐faced insulation comes in contact with electrical voltage, the foil could provide a path for current to pass through to the outer metal cabinet. While the current produced may not be enough to trip existing electrical safety devices (e.g. fuses or circuit breakers), the current can be enough to cause an electric shock hazard that could cause person­ al injury or death.

SAll field wiring must be done in accordance with National Electrical Code, applicable requirements of UL and local codes, where applicable.

SElectrical wiring, disconnect means and over-current protection are to be supplied by the installer. Refer to the air handler rating plate for maximum over-current protection, minimum circuit ampacity, as well as operating voltage.

SThe power supply must be sized and protected according to the specifications supplied on the product.

SThis air handler is factory-configured for 240 volt, single phase, 60 cycles. For 208-volt applications, see “208 Volt Conversion” later in this section.

SFor optional field‐installed electric heat applications, refer to the instructions provided with the accessory for proper installation.

WARNING

USE COPPER CONDUCTORS ONLY

1.Disconnect all power supplies.

2.Remove the air handler access panel.

3.Route the field supply wires to the air handler electrical connection box.

4.Use UL-listed wire nuts to connect the field supply conductors to the unit black and yellow leads, and the ground wire to ground terminal marked GND.

5.Replace the air handler access panel.

CONNECT BLACK AND

YELLOW WIRES TO

FIELD-PROVIDED

CONDUCTORS.

CONNECT GROUND

WIRE TO GROUND

TERMINAL MARKED

“GND”

Figure 11. Making Electrical Connections

208 VOLT CONVERSION

1.Disconnect all power supplies.

2.Remove the air handler access panel.

3.Using the wiring diagram located on the unit access panel as a reference, move the 2 connected black transformer leads from the 240 volt terminal on the transformer to the 208 volt terminal on the transformer.

WARNING

Electrically ground air handler. Connect ground wire to ground terminal marked “GND”.

Failure to do so can result in death or elec­ trical shock.

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CBX25UH SERIES

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Contents Table of Contents Shipping and Packing ListGeneral 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 DrainConnecting Refrigerant Lines Installing Duct SystemSealing 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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