Lennox BMAC-20C Installation Instructions Manual

Brand: Lennox

Model: BMAC-20C

Category: Air filters

Type: Installation Instructions Manual

This manual is also suitable for

BMAC-20CE

Lennox BMAC-20C is a box media air cleaner designed for use with air handlers delivering 1600 to 2200 cfm. It features a 5-inch MERV 8 filter media that captures dust mites, pollen, mold spores, pet dander, and other contaminants as small as 0.3 microns. The air cleaner is easy to install and maintain, with a simple filter replacement process. It can be installed in various configurations, including horizontal, vertical, and offset installations, to fit different HVAC system layouts.

PART NO. 37-6405BPART NO. 37-6405B

PART NO. 37-6405B

Replaces 37-6405A

AIR CLEANERS/

FILTERS

HEALHEAL

HEALTHY CLIMATHY CLIMA

THY CLIMATHY CLIMA

THY CLIMATETE

TETE

TE®®

®®

BOBO

BOX MEDIA X MEDIA

X MEDIA X MEDIA

X MEDIA AIR CLEANERAIR CLEANER

AIR CLEANERAIR CLEANER

AIR CLEANER

Dallas, Texas USA

INSTALLATION INSTRUCTIONS FOR LENNOX MODELS BMAC-12C, BMAC-14CE*, BMAC-20C, BMAC-20CE*INSTALLATION INSTRUCTIONS FOR LENNOX MODELS BMAC-12C, BMAC-14CE*, BMAC-20C, BMAC-20CE*

INSTALLATION INSTRUCTIONS FOR LENNOX MODELS BMAC-12C, BMAC-14CE*, BMAC-20C, BMAC-20CE*

*CE Models are upgradeable to a Healthy Climate® Electronic Air Cleaner

IntroductionIntroduction

Introduction

The Lennox Box Media Air Cleaner (BMAC) is shipped with

either a 3” or 5” MERV 8 media air filter depending on the

model. The 5” filter must be replaced every year and the 3”

filter must be replaced every 6 months to ensure maximum

efficiency of both the air filter and air handler. Applications with

higher dust levels may require more frequent replacement.

Upgrade kits are available for BMAC-14CE and BMAC-20CE

models to replace media filters with electronic air cleaner

components.

Please read instructions before installing and using the Healthy

Climate® Box Media Air Cleaner.

CACA

CAUTIONUTION

UTIONUTION

UTION

1. Read this Owners Manual and the Rules for Safe

Operation carefully. Failure to follow these rules and

instructions could cause a malfunction of filter or

unsatisfactory service.

2. Follow a regular service and maintenance schedule

for efficient operation.

3. Maximum static weight for cabinet: 400 lbs.

Rules for Safe Installation and OperationRules for Safe Installation and Operation

Rules for Safe Installation and Operation

Box Media Air Cleaner ModelsBox Media Air Cleaner Models

Box Media Air Cleaner Models

BMAC-12C (X0577) BMAC-12C (X0577)

BMAC-12C (X0577) is designed for use with air handlers

which deliver 1000 to 1600 cfm. BMAC-12C is equipped with

a 3” filter media (X0581) and cannot be upgraded.

BMAC-14CE (X0578)BMAC-14CE (X0578)

BMAC-14CE (X0578) is designed for use with air handlers

which deliver 1000 to 1600 cfm. BMAC14CE is equipped

with a 5” filter media (X0584) and may be upgraded to

Healthy Climate electronic air cleaner using kit X0598.

BMAC-20C (X0589)BMAC-20C (X0589)

BMAC-20C (X0589) is designed for use with air handlers

which deliver 1600 to 2200 cfm. BMAC-20C is equipped with

a 5” filter media (X0586) and cannot be upgraded. It also has

rails that can be removed to accomodate a 5” filter media

(X1152).

BMAC-20CE (X0580)BMAC-20CE (X0580)

BMAC-20CE (X0580) is designed for use with air handlers

which deliver 1600 to 2200 cfm. BMAC-20CE is equipped

with a 5” filter media (X0587) and may be upgraded to

Healthy Climate electronic air cleaner using kit X0599.

Required ToolsRequired Tools

Required Tools

• Tin Snip

• Straight Screwdriver

• Rule or Tape Measure

• Drill

504,638M

09/2003

Lennox Industries, Inc.Lennox Industries, Inc.

Lennox Industries, Inc.

Dallas, Texas

1-800-9-LENNOX

www.lennox.com

Shipping and Packing ListShipping and Packing List

Shipping and Packing List

Package 1 of 1 contains:Package 1 of 1 contains:

Package 1 of 1 contains:

1 - Box Media Cabinet

1 - Box Media Filter

1 - Cabinet Door

1 - Fastener Screw

1 - Installation Instructions

1 - IAQ Guide and Warranty

WARNINGWARNING

WARNING

WARNINGWARNING

WARNING

CACA

CAUTIONUTION

UTIONUTION

UTION

Risk of equipment damage and/or high energy usage.Risk of equipment damage and/or high energy usage.

Risk of equipment damage and/or high energy usage.

Dirty air filters will cause high energy usage and/orDirty air filters will cause high energy usage and/or

Dirty air filters will cause high energy usage and/or

damage to the ventilation system.damage to the ventilation system.

damage to the ventilation system.

Replace filters at recommended intervals.Replace filters at recommended intervals.

Replace filters at recommended intervals.

Risk of property damage, injury or death.Risk of property damage, injury or death.

Risk of property damage, injury or death.

Installation, adjustment, alteration, service and main-Installation, adjustment, alteration, service and main-

Installation, adjustment, alteration, service and main-

tenance must be performed by a qualified servicetenance must be performed by a qualified service

tenance must be performed by a qualified service

technician.technician.

technician.

Electrical shock hazard.Electrical shock hazard.

Electrical shock hazard.

Can cause injury or death.Can cause injury or death.

Can cause injury or death.

Disconnect all remote electrical powerDisconnect all remote electrical power

Disconnect all remote electrical power

supplies before servicing.supplies before servicing.

supplies before servicing.

WARNINGWARNING

WARNING

Risk of carbon monoxide poisoning.Risk of carbon monoxide poisoning.

Risk of carbon monoxide poisoning.

Can cause injury or death.Can cause injury or death.

Can cause injury or death.

Do not operate without access panel in place. Opera-Do not operate without access panel in place. Opera-

Do not operate without access panel in place. Opera-

tion of this equipment without the access panel in placetion of this equipment without the access panel in place

tion of this equipment without the access panel in place

may cause gas fumes from the heating system to bemay cause gas fumes from the heating system to be

may cause gas fumes from the heating system to be

drawn into occupied spaces.drawn into occupied spaces.

drawn into occupied spaces.

Sharp edges hazard.Sharp edges hazard.

Sharp edges hazard.

Equipment sharp edges can cause injuries.Equipment sharp edges can cause injuries.

Equipment sharp edges can cause injuries.

Use protective gloves when grasping equipmentUse protective gloves when grasping equipment

Use protective gloves when grasping equipment

edges.edges.

edges.

AIR FILTER COMPARTMENT

5" FILTER

DOOR

Junction box

(CE models only)

UNFILTERED AIR IN

3" FILTER or

5" FILTER

FILTERED AIR OUT

Figure 1Figure 1

Figure 1

Figure 2Figure 2

Figure 2

Air Filter OperationAir Filter Operation

Air Filter Operation

Unfiltered air flows through the return air ducts and into the

BMAC cabinet. As the air flows across the MERV 8 filter, it

captures dust mites, pollen, mold spores, pet dander and

other contaminants that are 0.3 microns or larger.

The filtered and conditioned air is distributed throughout the

living space through the supply air ducts.

Box Media Air Cleaner ConstructionBox Media Air Cleaner Construction

Box Media Air Cleaner Construction

The BMAC box media air cleaner is easy to install and

maintain. The basic components of the air cleaner are

detailed below and are shown in figure 2.

NONO

NOTE:TE:

TE:TE:

TE: The BMAC-20C unit has two rails that are clipped

inside the cabinet (see Fig 2A). These rails can be removed

to allow the cabinet to accomodate a 5” filter media

(X1152). Use a screwdriver to pop out the clips to remove

the rails. The 5” filter media will slide into the cabinet.

The air filter cabinet is installed in the existing return air duct

system and houses either the supplied filter media on “C”

models or the upgrade components (electronic air cleaner

cells) on the “CE” models.

NOTE NOTE

NOTE - An upgrade kit is available for use with CE

models.(CE models do not have removable rails.) Electronic

air cleaner cells are provided in the kit to replace the

existing MERV 8 media filter.

Clip

Clip Removable

Rail

Removable

Rail

Figure 2A

Model No.Model No.

Model No. Filter SizeFilter Size

Filter SizeFilter Size

Filter Size Catalog No.Catalog No.

Catalog No.Catalog No.

Catalog No.

BMAC-12C 16 x 25 x 3 X0581

(406.4 x 635 x 76.2)

BMAC-14CE 16 x 26 x 5 X0584

(406.4 x 660.4 x 127)

BMAC-20C 20 x 25 x 5 X0586

(508 x 635 x 127) X1152

BMAC-20CE 20 x 26 x 5 X0587

(508 x 660.4 x 127)

Model No.Model No.

Model No. AA

ABB

BCC

CDD

DEE

EFF

BMAC-12C 24-5/8 21-29/32 13-1/2 16-15/32 17-13/32 4-15/16

(625.5) (556.4) (342.9) (418.3) (442.1) (125.4)

BMAC-14CE 26-3/8 23-5/8 13-9/16 16-15/32 19-15/32 6-15/16

(669.9) (600.1) (344.5) (418.3) (494.5) (176.2)

BMAC-20C 24-5/16 22-5/16 17-3/16 20-3/16 21-5/32 6-15/16

(617.5) (566.7) (436.6) (512.8) (537.4) (176.2)

BMAC-20CE 26-11/32 23-5/8 17-3/4 20-21/32 23-21/32 6-15/16

(669.1) (600.1) (450.9) (524.7) (600.9) (176.2)

AIR FLOW

NOT TO EXCEED 20

AIR HANDLER

RETURN AIR/

ENTERING AIR

OPENING

AIR HANDLER AIR CLEANER DUCT

AIR FLOW

AIR CLEANER

OPENING

TRANSITION SECTION

(

IF NEEDED

)

Figure 4

Box media air filter locationBox media air filter location

Box media air filter location

LOCATING THE AIR CLEANERLOCATING THE AIR CLEANER

LOCATING THE AIR CLEANER

Install the air cleaner in the return air duct (air entering

side) of the furnace or air handler as shown in figure 3.

Install the air cleaner in such a way that the face of the filter

is at a right angle to the air stream. Do not install the air

cleaner in the discharge or supply air duct system.

Allow 25” clearance in front of the air cleaner to accom-

modate removal of media filters or air cleaner cells. Refer

to figure 4 for dimensions.

If air handler return air, or air entering, opening is not large

enough to accommodate air filter, install a field fabricated

sheet metal transition. Transition reduction should be no

more than 4 inches per linear foot, creating an angle of

approximately 20 degrees. Refer to figure 4.

SPECIAL INSTALLATION NOTES:SPECIAL INSTALLATION NOTES:

SPECIAL INSTALLATION NOTES:

Atomizing spray-type humidifier (if used) must be installed

downstream of the air cleaner.

UV germicidal light (if used) must be installed a minimum

of 6 ft. from the air cleaner when the two are installed in

direct line of sight to one another. If there is a 90 degree

bend or turn in the air duct between the air cleaner and UV

light, a 3 ft. installation clearance is required between the

two.

Dimension/SpecificationsDimension/Specifications

Dimension/Specifications

Filter Media Dimensions NominalFilter Media Dimensions Nominal

Filter Media Dimensions Nominal

in Inches (Millimeters)in Inches (Millimeters)

in Inches (Millimeters)

Specifications subject toSpecifications subject to

Specifications subject to

change without notice.change without notice.

change without notice.

Dimensions in Inches (Millimeters)Dimensions in Inches (Millimeters)

Dimensions in Inches (Millimeters)

Figure 3

AIR FLOW

Figure 10

LESS THAN

7 INCHES

FIGURE 9

OFFSET

AT LEAST

9 INCHES

AIR FLOW

Figure 7

AIR FLOW

Figure 6

AIR FLOW

Figure 5

UPFLOW AIR HANDLERUPFLOW AIR HANDLER

UPFLOW AIR HANDLER

(Figure 8)(Figure 8)

(Figure 8)

Installation beneath air handler.

Air cleaner mounts horizontally,

where return air enters from

below. Raise air handler and

install beneath base.

DOWNFLOWDOWNFLOW

DOWNFLOW

AIR HANDLER (Figure 6)AIR HANDLER (Figure 6)

AIR HANDLER (Figure 6)

Air cleaner is mounted hori-

zontally in return duct or ple-

num, just above air handler.

OFFSET INSTALLATIONOFFSET INSTALLATION

OFFSET INSTALLATION

(Figure 9)(Figure 9)

(Figure 9)

Typical use of duct offset to match air cleaner opening.

If duct connection to air handler allows less than nine

inches for mounting the air cleaner, shorten the lateral

trunk, or attach an offset fitting to the elbow.

HORIZONTAL AIR HANDLERHORIZONTAL AIR HANDLER

HORIZONTAL AIR HANDLER

(Figure 10)(Figure 10)

(Figure 10)

Air cleaner is mounted vertically in

the return duct near air handler.

BASEMENT AIRBASEMENT AIR

BASEMENT AIR

HANDLER (LOWBOY)HANDLER (LOWBOY)

HANDLER (LOWBOY)

(Figure 5)(Figure 5)

(Figure 5)

Air cleaner is mounted hori-

zontally in return plenum,

just above air handler.

Typical ApplicationsTypical Applications

Typical Applications

UPFLOW AIR HANDLERUPFLOW AIR HANDLER

UPFLOW AIR HANDLER

(Figure 7)(Figure 7)

(Figure 7)

Side installation. Air cleaner

is mounted vertically, where

return air enters side inlet of

air handler.

REMOVE OLD FILTER AND DISCARDREMOVE OLD FILTER AND DISCARD

REMOVE OLD FILTER AND DISCARD

(Figure 11)(Figure 11)

(Figure 11)

NOTE: This filter may be mounted in the air handler

cabinet.

CLEAN BLOWER COMPARTMENTCLEAN BLOWER COMPARTMENT

CLEAN BLOWER COMPARTMENT

NOTE: The air filter cannot remove dirt from blower and

ducts.

INSTALLATIONINSTALLATION

INSTALLATION

The following is a typical installation of the air cleaner on

an upflow air handler (Figure 7).

1. Place the air cleaner cabinet on the floor. Stand it

upright with the door facing you (Figure 2). If a

horizontal installation is being planned, lay the cabinet

on its side, this will help you to visualize the relative

location of all parts.

2. Unscrew the knob, remove the door (by grasping top

and pulling door away from cabinet) and set it aside.

Remove filter. Set in a safe location until the cabinet

is installed.

3. Set the cabinet next to the air handler (if possible) to

match the opening in the compartment.

If the air handler opening cannot be enlarged, a

transition fitting should be used. (Figure 3).

The cabinet can be attached directly (Figure 12), or a

starting collar can first be fitted to the furnace inlet. A

butt or slip joint can be used.

Securely attach the cabinet to air handler inlet, using

at least two of the mounting holes on each side of the

cabinet.

4. Using butt joint, attach duct (normally an elbow) to the

upstream side of air filter cabinet. (Note the use of the

sheet metal turning vanes inside the elbow to improve

air distribution.) (Figure 13)

NOTE: NOTE:

NOTE: An optional method of attaching duct to the air

cleaner cabinet is to modify the cabinet (Figure 14) by

bending the tabs outward at a 90° angle and attaching duct

to tabs.

High Humidity EnvironmentsHigh Humidity Environments

High Humidity Environments: Wrapping cabinet with 2”

foil faced insulation (foil on the outside) around the case

(excluding the insulated door) will prevent condensation

on the sides of the unit.

Transition FittingsTransition Fittings

Transition Fittings

If the air duct does not fit the cabinet opening, a transition

fitting should be used. Gradual transitions are preferred

for greatest efficiency. Not more than four inches per

linear foot (approximately 20° angle) should be allowed

(Figure 3).

5. Connect the vertical duct section to the elbow. Wedge

a wood block between floor and elbow for support

(Figure 15).

6. Seal all joints in the return air system downstream

from the air filter with duct tape to prevent dust from

entering the air stream. Tape is usually applied on the

outside of ducts, but may also be applied on the

inside, or both.

7. With the air filter compartment installed, re-install

3” or 5” filter and door. (Figure 2)

NOTENOTE

NOTE: Please remove the plastic bag from the filter

media prior to installing the filter media into the air

cleaner cabinet. Proper disposal procedure of

plastic materials should be followed.

Figure 11

Air Flow Turning

Vanes

Figure 13

Optional method

(Bend tabs outward at 90˚ angle)

Figure 14

InstallationInstallation

Installation

Risk of property damage, injury or death.Risk of property damage, injury or death.

Risk of property damage, injury or death.

Installation, adjustment, alteration, service and main-Installation, adjustment, alteration, service and main-

Installation, adjustment, alteration, service and main-

tenance must be performed by a qualified servicetenance must be performed by a qualified service

tenance must be performed by a qualified service

technician.technician.

technician.

WARNINGWARNING

WARNING

Part NumberPart Number

Part Number

ItemItem

Item BMAC-BMAC-

BMAC-BMAC-

BMAC- BMAC-BMAC-

BMAC-BMAC-

BMAC- BMAC-BMAC-

BMAC-BMAC-

BMAC- BMAC-BMAC-

BMAC-BMAC-

BMAC-

No.No.

No. DescriptionDescription

DescriptionDescription

Description 12C12C

12C12C

12C 14CE14CE

14CE14CE

14CE 20C20C

20C20C

20C 20C20C

20C20C

20CEE

1 Cabinet X0588 X0589 X0590 X0591

2 Filter X0581 X0584 X0586 X0587

X1152

3 Cabinet Door X0592 X0593 X0594 X0595

4 Screw, Fastener X0596 X0596 X0596 X0596

PART NO. 37-6405APART NO. 37-6405A

PART NO. 37-6405A

CONDUIT

FLOOR

DUCT

AIR CLEANER

For maximum efficiency, your air filter should be

inspected once a month and changed if dirt load is

heavy. The 3” filter should be changed every 6

months and the 5” filter should be changed every

12 months. More frequent changes may be required

in high dust environments.

When changing is required, the following procedure

should be used:

1. Remove door from air filter cabinet by unscrewing

the knob.

2. Remove 3” or 5” filter and throw away.

3. Replace 3” or 5” filter by sliding it into the cabinet.

(Note direction of air flow.)

NOTENOTE

NOTE: Please remove the plastic bag from the filter

media prior to installing the filter media into the air

cleaner cabinet. Proper disposal procedure of

plastic materials should be followed.

4. Re-attach door.

When ordering repair parts, always give the following

information as shown in this list.

1. The PART NUMBER

2. The PART DESCRIPTION

3. The MODEL NUMBER of the Box Media Air Cleaner

PARTS LIST FOR BOX MEDIA AIR CLEANERPARTS LIST FOR BOX MEDIA AIR CLEANER

PARTS LIST FOR BOX MEDIA AIR CLEANER

Vertical

Section

Wood Block

Tape All

Joints

Figure 15Figure 15

Figure 15

Figure 16Figure 16

Figure 16

DescriptionDescription

Description BMAC-14CEBMAC-14CE

BMAC-14CEBMAC-14CE

BMAC-14CE BMAC-20CEBMAC-20CE

BMAC-20CEBMAC-20CE

BMAC-20CE

Electronic Air Cleaner Upgrade Kit X0598 X0599

ELECTRONIC AIR CLEANER KITELECTRONIC AIR CLEANER KIT

ELECTRONIC AIR CLEANER KIT

UPGRADE!UPGRADE!

UPGRADE!

Repair Parts and AccessoriesRepair Parts and Accessories

Repair Parts and Accessories

Models BMAC-14CE and BMAC-20CE can be upgraded

to a High Efficiency Electronic Air Cleaner. Call your

local Lennox dealer for details.

• Contact your local Lennox dealer to order replace-

ment parts. For the Lennox dealer nearest you, dial

1-800-9-LENNOX, or visit www.lennox.com

DescriptionDescription

Description BMAC-12CBMAC-12C

BMAC-12CBMAC-12C

BMAC-12C BMAC-14CEBMAC-14CE

BMAC-14CEBMAC-14CE

BMAC-14CE BMAC-20CBMAC-20C

BMAC-20CBMAC-20C

BMAC-20C BMAC-20CEBMAC-20CE

BMAC-20CEBMAC-20CE

BMAC-20CE

Air Cleaner X0577 X0578 X0579 X0580

Risk of equipment damage and/or high energy usage.Risk of equipment damage and/or high energy usage.

Risk of equipment damage and/or high energy usage.

Dirty air filters will cause high energy usage and/orDirty air filters will cause high energy usage and/or

Dirty air filters will cause high energy usage and/or

damage to the ventilation system.damage to the ventilation system.

damage to the ventilation system.

Replace filters at recommended intervals.Replace filters at recommended intervals.

Replace filters at recommended intervals.

CACA

CAUTIONUTION

UTIONUTION

UTION

WARNINGWARNING

WARNING

Risk of carbon monoxide poisoning.Risk of carbon monoxide poisoning.

Risk of carbon monoxide poisoning.

Can cause injury or death.Can cause injury or death.

Can cause injury or death.

Do not operate without access panel in place. Opera-Do not operate without access panel in place. Opera-

Do not operate without access panel in place. Opera-

tion of this equipment without the access panel in placetion of this equipment without the access panel in place

tion of this equipment without the access panel in place

may cause gas fumes from the heating system to bemay cause gas fumes from the heating system to be

may cause gas fumes from the heating system to be

drawn into occupied spaces.drawn into occupied spaces.

drawn into occupied spaces.

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waa

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Not by “ITEM NUMBER”y “ITEM NUMBER”

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Lennox BMAC-20C Installation Instructions Manual

Brand: Lennox

Model: BMAC-20C

Category: Air filters

Type: Installation Instructions Manual

This manual is also suitable for

BMAC-20CE

Download PDF

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Lennox BMAC-20C Installation Instructions Manual

This manual is also suitable for

Lennox BMAC-20C Installation Instructions Manual

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