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INSTALLATION
LIMITATIONS
These units must be installed in accordance with the follow-
ing national and local safety codes.
1.
National Electrical Code ANSI/NFPS No. 70 or Canadian
Electrical Code Part 1, C22.1 (latest editions).
2.
National Fuel Gas Code Z223.1 or CAN/CGA B149.1
or.2 Installation Code.
3.
Local gas utility requirements.
4.
Local plumbing and waste water codes and other appli-
cable local codes.
Refer to Table 1 for unit application data and to Table 2 for
gas heat application data.
If components are to be added to a unit to meet local codes,
they are to be installed at the dealer's and/or the customer's
expense.
Size of unit for proposed installation should be based on heat
loss/heat gain calculations made in accordance with industry
recognized procedures identified by the Air Conditioning
Contractors of America.
TABLE 1: UNIT APPLICATION DATA
Voltage Variation
208/230V
1
Min. / Max.
Wet Bulb Temperature (°F) of Air on
Evaporator Coil, Min. / Max.
Dry Bulb Temperature (°F) of Air on
Condenser Coil, Min.
1.
Rated in accordance with ARI Standard 110, utilization range
"A".
2.
"T1" transformer primary tap must be moved from the 230 volt
connection to the 208 volt connection for low voltage applica-
tions of 208 volt and below
3.
A low ambient accessory is available for operation down to 0 °F.
LOCATION
Use the following guidelines to select a suitable location for
these units.
1.
Unit is designed for outdoor installation only.
2.
Condenser must have an unlimited supply of air. Where
a choice of location is possible, position unit on either
north or east side of building.
4
2
187 / 253
460V
414 / 504
57 / 72
45 / 120
3
/ Max.
Excessive exposure of this furnace to contami-
nated combustion air may result in equipment
damage or personal injury. Typical contaminants
include: permanent wave solution, chlorinated
wastes and cleaners, chlorine based swimming
pool chemicals, water softening chemicals, carbon
tetrachloride, halogen type refrigerants, cleaning
solvents (e.g. perchloroethylene), printing inks,
paint removers, varnishes, hydrochloric acid,
cements and glues, antistatic fabric softeners for
clothes dryers, masonry acid washing materials.
3.
For ground level installation, a level pad or slab should
be used. The thickness and size of the pad or slab used
should meet local codes and unit weight. Do not tie the
slab to the building foundation.
4.
For roof top installation, be sure the structure will support
the weight of the unit plus any field installed components.
Unit must be installed on a level roof curb or appropriate
angle iron frame providing adequate support under the
compressor/condenser section.
5.
Maintain level tolerance of unit to 1/8" maximum.
RIGGING OR HANDLING
Care must be exercised when moving the unit. Do not
remove any packaging until the unit is near the place of
installation. Rig unit with slings placed under the unit.
Spreader bars of sufficient length should be used across the
top of the unit.
Before lifting a unit, make sure that its weight is dis-
tributed equally on the cables so that it will lift
evenly.
Units may also be moved or lifted with a fork-lift. Slotted
openings in the skid are provided for this purpose. Forks
must pass completely through the base.
Refer to Table 2 for unit weights and to Figure 2 for approxi-
mate center of gravity.
282911-YIM-B-0807
Unitary Products Group
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