Carrier 31MC - Manual

Electronic and Mechanical Air Cleaner
31MC
|—8i"-4
SIMM
UNIT A (in.)
31MC,MP114 21’/4
31MP214; ^
31MC,MM,MP220
28V,
31MP
Fig. 1 — Dimensions, Electronic and Mechanical Air Cleaners
GENERAL
The Carrier 31MP plate-type and 31 MM media-
type electronic air cleaners and the 31MC high-
efficiency mechanical air filters, all shown in Fig.
1, are designed for use with residential and light
commercial forced-air heating and/or cooling sys­
tems. They can be installed vertically or hori-
zont^lji in. the ductwoi;ic„
9 r at the furnace. The
units are easily converted in the field from right to
left hand by removing the air cleaning components
and reassembling them in reverse order. Cabinets
will support a weight of 400 lb when installed
beneath a vertical furnace or air-handling unit.
Package Contents — The 31MP and 31 MM elec­
tronic air cleaner packages and the 31MC high-
efficiency filter package consist of:
1. One31MP, 31MMor31MCunit.
2. Two base angle air baffles.
3. A template for preparing the furnace opening.
4. A bag of hardware consisting of 6 no. 8B x
1/4-in. long screws, 6 no. 8 speed nuts and a
small bag containing wire nuts for making
electrical connections.
5. A coil of foam tape.
6. Package of replacement media (31MM Models
only).
7. An installer’s packet.
When unpacking the unit, if any in-transit
damage is observed, file a claim with the trans­
portation agency. Since the air cleaner components
are packed in a single carton, be sure to inspect
all packing materials before discarding.
Application — Install the electronic air cleaner
where all of the air circulated by the system will
pass thru it. The best location is in the return air
duct close to the blower compartment. This
location provides the most even air flow distribu­
tion across the face of the electronic cells or
mechanical filter element and also allows the air
cleaner to keep the blower and motor clean. In a
cooling system, the air cleaner keeps the evap­
orator coil clean.
When it is not possible or economically feasible
to mount the air cleaner in the return air duct,
consider installing the unit in the air discharge
duct. However, give special consideration to the
following
factors when planning such an
installation.
1. Even air flow distribution across the face of the
electronic cells may be difficult to achieve. Use
turning vanes and transitions where necessary.
2. Put the air cleaner upstream from the coil in a
cooling system, if possible. The electronic air
cleaner or mechanical filter will help keep the
© Carrier Corporation 1975 Form 31MP-2SI