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MAXIMUM SHIPPING
UNIT
WEIGHT
542J
Lb
150
1895
180
2205
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Refer to Table 1 for unit operating weights.
3. Remove boards at ends of unit and runners prior to rigging.
4. Rig by inserting hooks into unit base rails as shown. Use corner post from pack-
aging to protect coil from damage. Use bumper boards for spreader bars.
5. Weights do not include optional economizer. See Table 1 for economizer weight.
CAUTION:
All panels must be in place when rigging.
Fig. 10 — Rigging Details
3/4" FPT DRAIN
CONNECTION
Fig. 11 — Condensate Drain Details
Fig. 12 — Condensate Drain Piping Details
DIMENSION A
Kg
Ft-in.
mm
860
3-1
948
1000
3-6
1059
1-3/4"
DRAIN HOLES
2. 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: On vertical supply and return units, when
drilling the duct system fastening holes into the bot-
tom of the unit for duct flanges, use extreme care not to
puncture the basepan. See Fig. 7.
3. 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 weather- and airtight seal.
4. Size all ductwork for maximum required airflow (either
heating or cooling) for unit being installed. Avoid abrupt
duct size increases or decreases.
5. Adequately insulate and weatherproof all ductwork
located outdoors. Insulate ducts passing through uncon-
ditioned space, and use vapor barrier in accordance with
latest issue of SMACNA (Sheet Metal and Air Condi-
tioning Contractors National Association) and ACCA
(Air Conditioning Contractors of America) minimum in-
stallation standards for heating and air-conditioning sys-
tems. Secure all ducts to building structure.
On units equipped with electric heat, a minimum clear-
ance to combustibles of 1 in. for the first 24 in. of duct-
work is required.
6. Flash, weatherproof, and vibration isolate all openings
in building structure in accordance with local codes and
good building practices.
C. Electrical Connections
WARNING: The unit cabinet must have an unin-
terrupted, unbroken, electrical ground to minimize the
possibility of personal injury if an electrical fault
should occur. This ground may consist of electrical wire
connected to the unit ground lug in the control com-
partment, or conduit approved for electrical ground when
installed in accordance with the NEC ANSI (American
National Standards Institute) /NFPA 70 (in Canada,
Canadian Electrical Code CSA [Canadian Standards
Association] C22.1) and local electrical codes. Failure
to adhere to this warning could result in personal
injury.
CAUTION: Failure to obey the following pre-
cautions could result in damage to the unit being
installed:
Field Power Supply (Fig. 13 and 14)
1. Make all electrical connections in accordance with NEC
ANSI/NFPA 70 and local electrical codes governing such
wiring. In Canada, all electrical connections must be in
accordance with CSA Standard C22.1 Canadian Electri-
cal Code Part One and applicable local codes. Refer to
unit wiring diagram.
2. A unit disconnect switch is required within sight from
the unit. The disconnect switch may be mounted on the
unit corner post. When mounting disconnect switch, be
sure the unit rating plate is not obstructed.
3. Use only copper or copper-clad conductor for connec-
tions between field-supplied electrical disconnect switch
and unit. The use of aluminum wire is not recom-
mended. See Fig. 13 for maximum wire size. For units
with electric heat, size wire per NEC recommendations.
—8—
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