548267-YIM-C-0211
10
Unitary Products Group
If using the duct connector with damper, cut a 9-1/8”x 16-1/8”
hole in the center of the duct bottom. If using the 12” diameter
duct connector without damper cut a 12-1/8” diameter hole in
the center of the duct bottom. Place the duct connector in the
hole and secure tightly with the tabs. If necessary, sup-port duct
connector with support braces. See Figures 6 & 7.
NOTE:
It is advisable to tape joints at the duct connector
airtight. There is extreme pressure exerted by the
blower at this point.
Installing Of Duct To Unit (Residential)
Flanges are provided to help install the ducts to the air
conditioner. The duct flanges must be field in-stalled on the
unit’s side.
The unit’s supply and return air connections are sized for
optimum performance. Should the duct work connecting to the
air conditioner be of smaller dimensions, it is recommended that
transitions connecting the ducts to the unit be constructed to
allow a smooth airflow to the heat unit’s return air opening and
from the supply air opening. Abrupt duct size changes increase
the system static pressure and reduces air volume which may
cause unsatisfactory performance.
Ductwork should be in accordance with local and national
codes.
Ductwork exposed to outside environmental conditions must be
insulated and weather proofed. Out-side wall openings through
which the ducts pass must be weather proofed in accordance
with good construction practices.
Supply and return air ducts passing through unconditioned
spaces of the building must be insulated and covered with a
vapor barrier. Following this practice will prevent thermal losses
and condensate formation on the ducts.
Installing Drain Tube And Connection
A drain tube, a barbed elbow plastic fitting, and a plastic hose
clamp are provided in the small parts package packed in the
blower chute.
1.
To insure proper condensate drainage, the barbed plastic
elbow fitting should be screwed into the unit drain fitting
(located in the front corner of the unit), and the drain tube
installed on the barbed end of the plastic fitting secured in
plastic fitting with the plastic hose clamp.
2.
If it is necessary to drain water away from unit, attach a
drain hose to the drain tube.
Service Access
Access to all serviceable components is provided at the
following locations:
• Blower compartment access panel
• Control box access panel
Refer to Figure 1 for location of these access locations and
minimum clearances in Table 3.
The drain hose must not rise above the level of the drain
fitting at any point in its routing. Failure to do so will
result in condensate water overflowing into the unit’s
interior.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system. Gage sets, hoses, refrigerant
containers and recovery systems must be designed to
handle R-410A. If you are unsure, consult the
equipment manufacturer. Failure to use R-410A
compatible servicing equipment may result in property
damage or injury.
Wear safety glasses and gloves when handling
refrigerants. Failure to follow this warning can cause
serious personal injury.
