10
3.0 DUCTWORK
NOTE
On ductwork exposed to outside air conditioning space, use at least 2” of
insulation and a vapor barrier. Flexible joint may be used to reduce noise.
These units are adaptable to downflow use as well as rear supply and return
air duct openings. To convert to downflow, use the following steps:
1. Remove the duct covers found in the bottom return and supply air duct
openings. There are four (4) screws securing each duct cover (save theses
to use in step 2).
2. Install the duct cover (removed in step one) to the rear supply and return
air openings. Secure with the four (4) screws used in steps one.
3. Seal duct covers with silicone caulk.
4.0 CONDENSATE DRAIN CONNECTION
1. Use female NPT threaded fitting for outside connection and make sure that
drain holes are not blocked.
2. Insulation may be needed for drain line to prevent sweating.
3. Drain pan has two drain connections on each side to provide flexibility of
connection and drainage. Make sure proper pitch and plugging if second
connection is not used.
4. Use a sealing compound on male pipe threads. Install the condensate
drain line (NPT) to spill into an open drain.
A closed return duct system shall be used. This shall not preclude use of
economizers or ventilation air intake. Flexible joints may be used in the
supply and return duct work to minimize the transmission of noise.
When fastening duct work to the side duct flanges on the unit, insert the
screws through the duct flanges only. DO NOT insert the screws through
the casing. Outdoor duct work must be insulation and waterproofed.
CAUTION
NOTE
Be sure to note supply and return openings. Refer to Fig. 3 and 4 for
information concerning rear and bottom supply and return air duct
openings.
Consult local codes for special requirements.
To provide extra protection from water damage, install an additional drain pan,
provided by installer, under the entire unit with a separate drain line. Manufac-
turer will not be responsible for any damages due to the failure to follow these
requirements.
4.1 INSTALL DRAIN PIPE
Duckwork should be made and sized by installer and in accordance with Air
Manual from Conditioning Contractors of America and local codes.
