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Install Flanges for Ductwork Connections (564A/764A060 only)
The size 060 units are shipped with flanges which must be
field-installed on the unit.
To install unit flanges:
1. Five pieces of flange are shipped on the return air open-
ing of the unit. Remove the flanges from the shipping
position. See Fig. 9. Screws are field-supplied.
2. One piece of flange is used as it is shipped (straight).
Bend the other 4 pieces at right angles.
3. Install the straight flange on the right side of the re-
turn air opening in holes provided. See Fig. 10. Flanges
should stick out from unit to allow for connection of
ductwork.
4. Install 2 hand-formed flanges onto return air opening
in holes provided to form rectangle around the return
air opening.
5. Install remaining 2 hand-formed flanges around dis-
charge air opening in holes provided.
6. Ductwork can now be attached to flanges.
Adhere to the following criteria when selecting, sizing, and
installing the duct system:
1. Select and size ductwork, supply-air registers, and return-
air grilles according to ASHRAE (American Society of
Heating, Refrigeration, and Air Conditioning Engi-
neers) recommendations.
CAUTION:
When drilling the duct system fastening
holes into the side of the unit for duct flanges, do not
drill deeper than
3
⁄
4
in., and use extreme care not to
puncture the coil or coil tubes. See Fig. 11.
2. Use flexible transition between rigid ductwork and unit
to prevent transmission of vibration. The transition may
be screwed or bolted to duct flanges. Use suitable gas-
kets to ensure weathertight and airtight seal.
3. Size ductwork for cooling air quantity (cfm).
4. Adequately insulate and weatherproof all ductwork
located outdoors. Insulate ducts passing through un-
conditioned space, and use vapor barrier in accordance
with latest issue of SMACNA (Sheet Metal and Air
Conditioning Contractors NationalAssociation) and ACCA
(Air Conditioning Contractors of America) minimum
installation standards for heating and air conditioning
systems. Secure all ducts to building structure.
5. Flash, weatherproof, and vibration-isolate all openings
in building structure in accordance with local codes and
good building practices.
6. Air filters should be installed in return-air ductwork.
Return-air filter grille or filter tracks in duct may be used.
Figure 12 shows a typical duct system with unit installed.
19.17″ 3.92″
Fig. 11 — Area Not To Be Drilled More Than
3
⁄
4
-in.
Fig. 9 — Shipping Location of Duct Flanges
(Size 060 Only)
Fig. 10 — Installation of Duct Flanges
(Size 060 Only)
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