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 require-
ments.
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 CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER 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 Efficient Mechanical Air Cleaner is designed
for installation in the return-air duct system of any forced-air
heating and/or cooling system. The model MACA Mechanical Air
Cleaners are available in three sizes, 1200, 1400, and 2000 CFM.
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 with
minimum air flow resistance. (See Table 1.)
INSTALLATION
I.
INSTALL AIR CLEANER CABINET IN RETURN-AIR
SYSTEM
CAUTION:
Turn OFF the electrical supply to the fur-
nace or air handler before beginning installation.
1. Remove and discard existing furnace or air handler filter(s).
2. Referring to Fig. 2 and 3 for air cleaner dimensions and
typical installations, determine best installation location of
air cleaner.
NOTE:
A 26-in. clearance must be allowed for removal of the
media assembly from the air cleaner cabinet.
3. Using standard practices, remove a section of return-air
duct to allow installation of air cleaner cabinet.
4. Install air cleaner in duct opening. (Use a transition if
openings are different).
5. 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.
6. Remove media filter from plastic bag and place media filter
in cabinet. Directional arrows on filter cartridge must point
in direction of air flow.
7. After unit has been secured, seal seams air tight with duct
tape or caulking.
8. Reinstall cabinet front panel door assembly.
Fig. 1—Model MACA Mechanical Air Cleaner
A98152
TABLE 1—AIR CLEANER PRESSURE DROP
SIZE
12
14
20
Airflow
(CFM)
Resistance (In. wc)
600
0.055
0.045
0.04
800
0.08
0.06
0.05
1000
0.12
0.115
0.09
1200
0.16
0.16
0.115
1400
—
0.23
0.15
1600
—
—
0.18
1800
—
—
0.22
2000
—
—
0.27
installation and
operation instructions
MECHANICAL
AIR CLEANER
Cancels:
New
II MACA-12-1
3-98
MACA
—1—
