Installation guide

POSITION UNIT
Unit is designed to be installed in a closet or flush
mounted. Can be serviced entirely from the front, includ-
ing replacing the filter. Allow space for wiring, piping, and
servicing unit.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in proper-
ty damage
A field fabricated auxiliary drain pan, with a sepa-
rate drain is REQUIRED for all installations over a
finished living space or in any area that may be
damaged by overflow from a restricted main drain
pan. In some localities, local codes require an aux-
iliary drain pan for ANY horizontal installation.
A. UPFLOW INSTALLATION
If return air is to be ducted through a floor, set unit on floor
over opening and use ]/8 to ]/4 inch thick fireproof resil-
ient gasket between duct, unit, and floor.
Exterior surface may sweat when unit is installed in non-
conditioned space. Installer must provide protection such
as full size auxiliary drain pan on all units installed in non-
conditioned space to prevent damage from condensation
runoff. It is recommended that units be insulated with 1"
thick fiberglass with the vapor barrier on the outside.
B. HORIZONTAL APPLICATION
Units are shipped in right to left configuration. Horizontal
applications require a return air duct be attached to the
furnace inlet. The opposite end of the return air duct is at-
tached to a return air filter grill through the ceiling or wall.
For left to right applications:
1. Remove and set aside front panels.
2. Remove the coil support bracket (4 screws).
3. Remove horizontal drain pan retaining clip (1
screw).
4. Carefully remove coil assembly and bottom drain
pan.
5. Move Horizontal drain pan from left hand side of
coil to right.
6. Install modified coil assembly back into unit.
7. Reinstall coil support bracket and horizontal drain
pan retaining clip.
8. Determine drain holes being used and reposition
knockout caps.
9. Reinstall doors.
AIR DUCTS
Connect supply-air duct over the outside of 3A"flanges
provided on supply-air opening. Secure duct to flange us-
ing proper fasteners for type of duct used, and seal duct-
to-unit joint. If return-air flanges are required, install
factory authorized accessory kit.
Use flexible connectors between duct work and unit to
prevent transmission of vibration. Duct work passing
through unconditioned space must be insulated and cov-
ered with vapor barrier to prevent formation of conden-
sate to prevent formation of condensate.
Duct work Acoustical Treatment
Metal duct systems that do not have a 90 degree elbow
and 10 feet of main duct before first branch takeoff may
require internal acoustical insulation lining. As an alterna-
tive, fibrous duct work may be used if constructed and
installed in accordance with the latest edition of SMACNA
construction standard on fibrous glass ducts. Both acous-
tical lining and fibrous duct work shall comply with Nation-
al Fire Protection Association as tested by UL Standard
181 for Class 1 air ducts.
ELECTRICAL CONNECTIONS
Refer to the unit's nameplate for specific electrical data.
Before proceeding with electrical connections, make cer-
tain that supply voltage, frequency, phase, and circuit am-
pacity are as specified on the unit rating plate. Make all
electrical connections in accordance with the NEC and
any local codes or ordinances that may apply. Use cop-
per wire rated for 75 degrees C minimum wire in the unit
wiring compartment only. A single power supply may be
connected directly to terminal block provided in the unit.
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to follow this warning could result in per-
sonal injury, death, and/or unit damage.
Ifa disconnect switch isto be mounted on unit, se-
lect a location where drill and fasteners will not
contact electrical or refrigeration components.
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