Lennox International Inc AIR HANDLERS, CBWMV Return Air Opening Guidelines

Page 6

Return Air Opening Guidelines

NOTE − Do not bring in air from the back of the unit. Return air can be brought in from the sides or bottom only.

Bottom Return

If the air handler is installed on a platform with bottom re- turn, make an airtight seal between the bottom of the air handler and the platform to ensure that the air handler op- erates properly and safely. Use aluminum tape or mastic between the plenum and the air handler cabinet to ensure a tight seal. The air handler is equipped with a removable bottom panel to facilitate installation.

Side Return

For side return air applications, cut the air handler cabinet at the maximum return air dimensions shown on page 2. See figure 3 for a typical side inlet arrangement with a tran- sition and filter.

NOTE − Single side inlet applications result in approxi- mately a 4 percent reduction of CFM on B−size units and approximately a 5 percent reduction of CFM on C−size units:

Side Return Air With Transition And Filter

20" X 25" X 1"

(508MM X 635MM X 25MM)

CLEANABLE FILTER

RETURN AIR

PLENUM

TRANSITION

Figure 3

Return Air Base

For return air with the optional return air base (RAB), see figure 4 (and refer to installation instructions provided with Return Air Base kit).

*NOTE − Both unit and return air base openings must be connected to and entirely covered by a single plenum or IAQ accessory opening. Optional side return air filter kits cannot be used with RAB Return Air Base.

Optional Return Air Base and Unit Dimensions − Inches (mm)

AIR FLOW

RETURN

AIR BASE

17 (432) RAB−B (98M60)

21 (533) RAB−C (98M58)

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(102)

 

*23 (584) Overall (Max.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE − IN SIDE RETURN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Minimum

APPLICATIONS, THE RAB

 

 

 

 

 

 

IS REQUIRED FOR 100%

 

 

 

 

 

 

11 (279)

 

 

 

CFM CAPACITY.

 

 

 

 

 

 

*Maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

14 (356)

 

 

 

 

 

 

 

 

 

 

 

 

 

*Unit

 

 

 

 

 

 

 

 

 

 

Side Return

 

 

 

Opening

 

 

 

 

 

 

 

 

 

 

Air Openings

 

 

 

 

 

 

 

 

 

 

 

 

 

(Either Side)

 

 

 

 

 

 

 

 

 

 

 

 

 

7−1/4

 

 

 

*Base

 

 

5−5/8

 

 

 

 

 

 

 

(184)

 

 

 

 

 

 

 

 

Opening

(143)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23 (584)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7/8 (22)

 

 

 

 

 

 

 

27−5/8 (702)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Height varies with plenum or IAQ accessory height.

3/4

(19)

FRONT VIEW

SIDE VIEW

Figure 4

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505047 09/06

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Image 6
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Contents Table of Contents Shipping & Packing ListIntroduction Cbwmv Unit Dimensions − inches mm TOP ViewCbwmv Unit Parts Arrangement Cbwmv Unit Optional AccessoriesGeneral Cbwmv Unit Parts DescriptionRequirements Installation − Setting EquipmentCbwmv Unit Service Clearances ApplicationDuct System Cbwmv Multi−Positional UnitReturn Air Plenum Return Air Opening Guidelines Horizontal Applications Leveling Bolt InstallationRemoving the Bottom Panel Unit Suspended in Attic or CrawlspaceFilter Assembly & Filters PlumbingElectrical Electrostatic Discharge ESD Precautions And Procedures Field Wiring Application Jumper Settings See figureRemoveable Jumpers Accessory Field Wiring TB66 & TB67 Accessory Field Wiring K212Accessory Relay Field Wiring K212 Indoor Blower SpeedsTypical Cbwmv Wiring Blower Speed Adjustments Freezestat OperationBDC3 Variable Blower Control Board Jumper Settings Factory Blower Speed Tap SettingsCBWMV−24B−040 Blower Performance CBWMV−36B−070 Blower PerformanceCBWMV−36C−090 Blower Performance CBWMV−60C−100 Blower PerformanceInitial Air Purging CBWMV−60C−120 Blower PerformanceAir Bleed Valve Location Service Filters System AdjustmentsAnnual Service Repair Parts ListTroubleshooting Continuous Fan Sequence of Operation YESTroubleshooting Cooling Sequence of Operation Troubleshooting Heating Sequence of Operation

CBWMV, AIR HANDLERS specifications

Lennox International Inc is a renowned leader in the heating, ventilation, and air conditioning (HVAC) industry, known for its commitment to innovation and energy efficiency. Among its impressive lineup of products, the CBWMV air handlers stand out as a reliable solution for optimal indoor climate control.

The CBWMV air handler is designed to provide efficient and effective airflow while being easy to install and maintain. One of the key features of the CBWMV model is its variable speed blower motor, which allows for precise control of airflow and temperature. This innovation not only enhances comfort levels within a space but also contributes to significant energy savings. By adjusting the speed of the motor according to the heating or cooling demand, the system operates more efficiently, reducing energy usage by up to 40% compared to conventional systems.

Another important characteristic of the CBWMV air handlers is their compatibility with a range of heating and cooling systems, including heat pumps and gas furnaces. This versatility makes them an ideal choice for residential and commercial applications alike. The unit’s compact design allows for flexible installation options, accommodating various spaces without compromising performance.

The CBWMV series is also engineered to provide superior air quality. With advanced filtration options, these air handlers can effectively remove dust, allergens, and pollutants from the air, promoting a healthier indoor environment. Many models come equipped with a MERV 16 filter, enhancing the filtration capability, and ensuring that occupants breathe cleaner air.

Durability is another hallmark of the CBWMV line. Constructed with high-quality materials, these air handlers can withstand rigorous use and environmental conditions. The units are designed to require minimal maintenance, with features that facilitate easy access for filter changes and routine servicing.

Additionally, the CBWMV series integrates seamlessly with Lennox’s smart technology solutions, allowing users to monitor and control their HVAC systems remotely. The compatibility with home automation systems ensures that users can optimize comfort settings and efficiency with ease.

In conclusion, Lennox International Inc's CBWMV air handlers offer a remarkable blend of efficiency, comfort, and innovative technology. With features that prioritize energy savings, air quality, versatility, and durability, they represent a forward-thinking choice for modern HVAC needs. Whether for residential or commercial use, these air handlers stand as a testament to Lennox's commitment to excellence in indoor climate management.
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