Ductwork; Filters; Conversion Procedure - Rheem Air Conditioners Installation Instructions Manual

PACKAGED AIR CONDITIONER
FLAT ROOFTOP INSTALLATION, ATTIC OR DROP CEILING
DISTRIBUTION SYSTEM. MOUNTED ON
ROOFCURB. CURB MUST BE LEVEL
FIGURE 13
VI. DUCTWORK
Ductwork should be fabricated by the installing contractor in
accordance with local codes and NFPA90A. Industry manuals
may be used as a guide when sizing and designing the duct
system - contact Air Conditioning Contractors of America, 1513
16th St. N.W., Washington, D.C. 20036.
WARNING
!
DO NOT, UNDER ANY CIRCUMSTANCES, CONNECT
RETURN DUCTWORK TO ANY OTHER HEAT PRODUCING
DEVICE SUCH AS A FIREPLACE INSERT, STOVE, ETC.
UNAUTHORIZED USE OF SUCH DEVICES MAY RESULT IN
FIRE, CARBON MONOXIDE POISONING, EXPLOSION,
PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR
DEATH.
The unit should be placed as close to the space to be air con-
ditioned as possible allowing clearance dimensions as indicat-
ed. Ducts should be run as directly as possible to supply and
return outlets. Use of non-flammable waterproof flexible con-
nectors on both supply and return connections at the unit to
reduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure if
the registers or diffusers are located on the wall or in the ceil-
ing. A slab installation could be considered when the registers
are low on a wall or in the floor.
On ductwork exposed to outside air conditions of temperature
and humidity, use a minimum of 2" of insulation and a vapor
barrier. Distribution system in attic, furred space or crawl space
should be insulated with at least 2" of insulation with vapor bar-
10
rier. One-half to 1" thickness of insulation is usually sufficient
for ductwork inside the air conditioned space.
Balancing dampers should be provided for each branch duct in
the supply system. Ductwork should be properly supported
from the structure.
When installing ductwork, consider the following items:
1. Noncombustible flexible connectors should be used
between ductwork and unit to reduce noise and vibration
transmission into the ductwork.
2. When auxiliary heaters are installed, use noncombustible
flexible connectors and clearance to combustible material
of 0" for the first 3 feet of discharge duct. Clearance to unit
top and side is 0".
VII. FILTERS
This unit is provided with 3 - 18" x 18" x 2" and 3 - 18" x 24" x
2" disposable filters. When replacing filters, ensure they are
inserted fully to the back to prevent bypass. See Figure 8.
Recommended supplier of this filter is Glassfloss Industries, Inc. or
AAF International
215 Central Avenue
P.O. Box 35690
Louisville, KY 40232
Phone: 1-800-501-3146
Part #: 54-42541-01 (18" x 18" x 2")
Part #: 54-42541-03 (18" x 24" x 2")
A0886-24
VIII. COVER PANEL INSTALLATION/
VIII.

CONVERSION PROCEDURE

DOWNFLOW TO HORIZONTAL
1. Remove the screws and covers from the outside of the
supply and return sections. Also remove and discard cover
plate. See Figure 3.
2. Install the covers over the bottom supply and return open-
ings, painted side up, inserting the leading flange under
the bracket provided. Place the back flange to top of
the front bracket provided. See Figure 14.
3. Secure the return and supply cover to front bracket with
two (2) screws.
FIGURE 14. COVER GASKET DETAIL
A0886-30
A0886-31