MACA
Mechanical Air Cleaner
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Installation and Operating Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Installation and service of heating and air conditioning equipment
can be hazardous due to system pressure and gas and electrical
components. Only trained and qualified personnel should install,
repair, or service heating and air conditioning equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations must
be performed by trained service personnel. When working on
heating and air conditioning equipment, observe precautions in the
literature, tags, and labels attached to or shipped with the unit and
other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warning or cautions attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special requirements.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the unit 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 hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.
INTRODUCTION
The Model MACA Mechanical Air Cleaner is designed for
installation in the return-air duct of any forced-air heating and/or
cooling system. The model MACA Mechanical Air Cleaners are
available in three sizes, 012, 014, and 020.
The Model MACA is a mechanical air cleaner incorporating
special pleated filter media designed to remove dirt, dust, pollen
and other microscopic particles from the air passing through it. The
pleats provide an exceptionally large filtering face area in a very
compact space which allows maximum dirt holding capacities.
When applying the MACA, attention must be given to duct and
system design because these components affect system static
pressure. To maintain the proper efficiency and reliable operation
of the MACA Mechanical Air Cleaner and your HVAC equipment, this filter should only be applied to properly designed duct
systems and properly sized HVAC equipment. The MACA has a
higher static pressure drop than the typical factory supplied
furnace and/or fan coil filter (See Table 1).
PLEAT SPACERS TOP AND BOTTOM
A98152
Fig. 1—Model MACA Mechanical Air Cleaner
INSTALLATION
Step 1—Install Air Cleaner Cabinet in Return-air System
Turn OFF the electrical supply to furnace or air handler
before beginning installation.
1. Remove and discard existing furnace or air handler filter(s).
2. Referring to Fig. 2 and Fig. 3 for air cleaner dimensions and
typical installations, determine best installation location of air
cleaner.
Table 1—Typical Pressure Drop
SIZE
FACTORY SUPPLIED
012
014
020
FURNACE/FAN COIL
Typical
Max
Typical
Max
Typical
Max
FILTER
Airflow
(cfm)
Resistance (In. wc)
600
0.015
0.05
0.06
0.03
0.04
0.04
0.04
800
0.02
0.07
0.08
0.05
0.06
0.05
0.05
1000
0.03
0.10
0.12
0.07
0.11
0.08
0.09
1200
0.035
0.14
0.18
0.10
0.16
0.11
0.12
1400
0.045
—
—
0.13
0.23
0.14
0.15
1600
0.055
—
—
—
—
0.17
0.18
1800
0.062
—
—
—
—
0.20
0.22
2000
0.07
—
—
—
—
0.24
0.27
NOTE: A 26-in. clearance must be allowed for removal of media
assembly from air cleaner cabinet.
3. Install supplied foam tape on side of air cleaner casing that
comes in contact with furnace.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 03MA-CA3
Printed in U.S.A.
Form MACA-3SI
Pg 1
11-98
Replaces: MACA-2SI
Tab 7a 9a
1″
A
B
3⁄16″
5⁄8″
225⁄8″
C
25″
A98178
Table 2—Dimensions
MODEL
MACAXCCCX012
MACAXCCCX014
MACAXCCCX020
A
18-1/8
18-1/8
22-1/8
B
13-3/4
13-3/4
17-3/4
C
5-1/4
7-1/4
7-1/4
Fig. 2—Dimensional Drawing
4. Using standard practices, remove a section of return-air duct
to allow installation of air cleaner cabinet.
Periodic inspection and annual replacement of your filter will
insure high efficiency air cleaning, refer to TABLE 3 for replacement filter part numbers.
5. Install air cleaner in duct opening. (Use a transition if
openings are different).
Step 3—Replacing Filter
6. Mounting holes are provided for duct work attachment. (See
Fig. 2). If adjoining duct work is flanged, install screws so that
their heads are inside cabinet to prevent damage to filter
during removal and installation.
Table 3—Replacement Filter
REPLACEMENT
FILTERS
KEAFL0106012 KEAFL0203014 KEAF0303020
ORDER NUMBER
NUMBER OF
FILTERS
6
3
3
PER CARTON
7. Remove media filter from plastic bag and place media filter in
cabinet. Directional arrows on filter cartridge must point in
direction of air flow.
NOTE: Pleat spacers may have shifted out of position during
shipment. Push down if necessary. (See Fig. 1)
1. Turn off power to furnace or air handler before removing
door.
8. After unit has been secured, seal seams air tight with duct tape
or caulking.
2. Open access door by pulling handle. Remove door completely.
3. Pull used filter straight out of cabinet.
9. Reinstall cabinet front panel door assembly.
4. Slide new filter cartridge into cabinet with "AIR-FLOW"
arrow pointing in direction of air flow.
NOTE: The air cleaner is set up for left to right air flow, when
facing the access door. For right to left air flow, remove filter
cartridge, turn it around and replace in cabinet. Directional arrows
on filter cartridge must point in direction of air flow. (See Fig. 3
for typical installations.)
NOTE: Pleat spacers may have shifted out of position during
shipment. Push down if necessary. (See Fig. 1)
5. Replace door.
Step 2—Maintenance
6. Turn power on.
The filter in your mechanical air cleaner must be replaced
periodically. The frequency of filter replacement is best determined by visual examination.
2
AIR FLOW
AIR FLOW
UPFLOW FURNACE
WITH TRANSITION
AIR FLOW
UPFLOW FURNACE
WITH TURNING VANES
UPFLOW FURNACE
NO TRANSITION
AIR FLOW
AIR FLOW
HORIZONTAL
DOWNFLOW
A98179
Fig. 3—Typical Installations
3
SERVICE TRAINING
Packaged Service Training programs are an excellent way to increase your
knowledge of the equipment discussed in this manual, including:
• Unit Familiarization
• Maintenance
• Installation Overview
• Operating Sequence
A large selection of product, theory, and skills programs is available, using popular
video-based formats and materials. All include video and/or slides, plus companion
book.
Classroom Service Training plus "hands-on" the products in our labs can mean
increased confidence that really pays dividends in faster troubleshooting, fewer
callbacks. Course descriptions and schedules are in our catalog.
CALL FOR FREE CATALOG 1-800-962-9212
[ ] Packaged Service Training
[ ] Classroom Service Training
A94328
Copyright 1999 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
maca3si
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 03MA-CA3
Printed in U.S.A.
Form MACA-3SI
Pg 4
11-98
Replaces: MACA-2SI
Tab 7a 9a
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