Page 6
Installer’s Guide
Step 3—Review Location and Recommenda-
tion Information
Step 4—Unit Installation
Ground Level Installation
To install the unit at ground level:
1. Place the unit on a pad the size of the unit or larger. The unit must be
mounted level for proper drainage of water through the holes in the base
pan.
The pad must not come in contact with the structure Be sure the outdoor
portion of the supply and return air ducts are as short as possible.
Unit requires vibration support as indicated in Figure 3 on page 8.
2. Location of the unit must allow service clearance around it. Clearance
of the unit must be given careful consideration. See Figures 1 & 2,
pages 4-5.
NOTE: Any reduction of the unit clearances indicated in these
illustrations may result in condenser coil starvation or the recircu-
lation of warm condenser air. Actual clearances, which appear
to be inadequate should be reviewed with a local engineer.
IMPORTANT: The air outlet duct must have 1" clearance to
combustible material downstream from the unit.
3. Attach the supply and return air ducts to the unit as explained in the
following Ductwork Installation section on page 16.
4. Flexible duct connectors must be of a flame retardant material. Insulate
any ductwork outside of the structure with at least two (2) inches of
insulation and weatherproof. There must be a weather proof seal where
the duct enters the structure.
5. Do not expose the unit to direct roof water runoff.
6. Seal all holes through exterior walls in accordance with local codes.
7. Continue with the remaining installation sections.
1. Location of the unit must allow service clearance around it to ensure
adequate serviceability, maximum capacity, and peak operating efficiency.
2. These units are designed for outdoor installation. They
may be in-
stalled directly on a slab, wood flooring, or on Class A, B, or C roof covering
material. The discharge air from the condenser fans must be unrestricted
for a minimum of 3 feet above the unit.
3. Check the handling facilities to ensure the safety of personnel and the
unit(s).
4. The unit must be mounted level for proper drainage of water
through the drain holes in the base pan.
5. The unit should not be exposed to direct roof water runoff.
6. Flexible duct connectors must be of a flame retardant
material. All duct work outside of the structure must be
insulated and weatherproofed in accordance with local codes.
7. Holes through exterior walls or roof must be sealed in
accordance with local codes.
8. All fabricated outdoor ducts should be as short as possible.
Clearances
1. The recommended clearances for single-unit installations are illustrated
in Figures 1 to 2, pages 4-5.
2. See the unit’s nameplate for the absolute minimum clearance between
the unit and any combustible surfaces.
