4. INSTALLATION
4.1
LOCATIONS AND RECOMMENDATIONS
■
The unit is designed for outdoor installations only. The unit may
be installed directly on wood flooring or on Class A, Class B,
or Class C roof covering material.
■
Location of the unit must allow service clearance around it.
Clearance of the unit must be given careful consideration.
■
Outdoor coils must have an unlimited supply of air.
■
Check the handling facilities to ensure the safety of personnel
and the unit(s).
■
Caution must be taken at all times to avoid Personal injuries
and/or damage to equipment.
■
The unit must be mounted level for proper drainage of water
through the holes in the base pan.
■
The unit must not be exposed to direct roof water runoff.
■
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.
■
Holes through exterior walls must be sealed in accordance with
local codes.
■
All fabricated outdoor ducts should be as short as possible.
4.2 ROOFTOP INSTALLATION
For roof top applications using a field fabricated frame
and ducts, use the following procedure:
■
Roof structure must be able to support the weight of
the unit and its options and/or accessories. Unit must
be installed on a solid level roof curb or appropriate
angle iron frame.
■
The frame must be located and secured by bolting or welding
to the roof. Flashing is required.
■
The hole in the roof must be prepared in advance of installing
the unit.
■
Secure the ducts to the roof.
■
Place the unit on the frame or roof curb.
■
Insulate any ductwork outside of the structure with at least
two (2) inches of insulation and then weatherproof. There must
be a weatherproof seal where the duct enters the structure.
■
Secure the unit to the frame or roof curb.
■
Complete the installation according to the instructions in
the following sections of this manual.
4.3 ON-THE-GROUND INSTALLATION
For ground level installations, the unit should be positioned
on a pad with a minimum thickness of 100 mm. The length and
width of the pad should be at least 150 mm greater than
the unit base rails. The unit must be level on the pad. 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.
Proceed with the installation as follows:
■
Place the unit on the pad.
■
Attach the supply and return air ducts to the unit.
■
Insulate any ductwork outside of the structure with at least
2 inches of insulation and weatherproof. There must be a weather-
proof seal where the duct enters the structure.
■
Complete the installation according to the instructions in the
following sections of this manual.
TYPICAL ROOFTOP INSTALLATION WITH FRAME
Figure 2
SUPPL
Y
RETURN
TYPICAL ON-THE-GROUND INSTALLATION
Figure 3
≥
3000
OVERHEAD CLEARANCE
≥
800
≥
800
TO SER
VICE COIL
AND CLEAN FIL
TER
TO SER
VICE ELECTRICAL
CONTROLS AND
INDOOR
BLOWER
≥
300
≥
500
≥
100
TO
SUPPL
Y
AIR FOR COIL
TO
CONNECT
DRAIN PIPING
3
I&O manual
