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3. Unit is design certified for application on combustible flooring with 0" minimum
clearance.
4. See Figure 2 for illustration of minimum installation-service clearances.
D. ROOFTOP INSTALLATION
1. Before locating the unit on the roof, make sure that the strength of the roof and
beams is adequate at that point to support the weight involved. (See specification
sheet for weight of unit.) This is very important and user's responsibility.
2. The unit should be placed on a solid and level platform of adequate strength.
IMPORTANT: Avoid blocking openings in bottom of unit. (See Figure 3).
Provision for disposal of outdoor coil defrost water runoff must be provided.
3. The location of the unit on the roof should be such as to provide proper access for
inspection and servicing.
IMPORTANT: If unit will not be put into service immediately, cover supply and return
openings to prevent excessive condensation.
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.
Place the unit as close to the space to be air conditioned as possible allowing clearance
dimensions as indicated. Run ducts as directly as possible to supply and return outlets.
Use of non-flammable waterproof flexible connectors on both supply and return connec-
tions 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 ceiling. Consider a slab installation 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 mini-
mum 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 barrier. One-half
to 1" thickness of insulation is usually sufficient for ductwork inside the air conditioned
space.
Provide balancing dampers for each branch duct in the supply system. Properly support
the ductwork from the structure.
VII. FILTERS
Filters are not provided with this unit. They must be supplied and installed in the return
air duct by the installer. A field installed filter grille is recommended for easy and conve-
nient access to the filters for periodic inspection and cleaning. Filters must have ade-
quate face area for the rated air quantity of the unit. See General Database for recom-
mended filter size.
VIII.CONDENSATE DRAIN
The indoor coil condensate drain ends with a PVC stub. A trap is provided in for proper
condensate drainage and to prevent debris from being drawn into the unit. Do not con-
nect drain to closed sewer line. It is not recommended that a PVC cement or other per-
manent installation be used so that the drain line and/or drain pan can be easily cleaned
in the future. The drain trap is located in the control box during shipping. To install, slide
clear plastic tube over drain pan connection. The white PVC trap can be oriented as
required by installation.
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