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PRODUCT NOMENCLATURE
LIMITATIONS
These units must be installed in accordance with the current
edition of the following national and local safety codes:
In the U.S.A.:
1.
National Electrical Code ANSI/NFPA No. 70.
2.
National Fuel Gas Code Z223.1.
3.
Gas-Fired Central Furnace Standard ANSI Z21.47-1993.
4.
Local gas utility requirements.
In Canada:
1.
Canadian Electrical Code CSA C22.1
2.
Current Gas Installation Codes CAN/CGA-2.3-M93.
3.
Local plumbing and waste water codes.
4.
Other applicable local codes.
5.
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 calculation made according to the methods of
Air Conditioning Contractors of America (ACCA). .
TABLE 1: UNIT APPLICATION DATA
Model DHG
Voltage Variation
1
Min. / Max.
Supply Air CFM, Nom.
Wet Bulb Temperature (ºF) of Air on Evapora-
tor Coil, Min. / Max.
Dry Bulb Temperature (°F) of Air on Con-
2
denser Coil Min
/ Max.
4
036
048
060
208/
187 / 253
230V
460V
414 / 506
1200
1600
2000
57 / 72
57 / 72
57 / 72
45 / 120
45 / 120
45 / 120
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.
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.
Roof structures 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.
If a unit is to be installed on a roof curb or special
frame other than a YORK roof curb, gasketing
must be applied to all surfaces that come in con-
tact with the unit underside.
5.
Maintain level tolerance to 1/2" maximum across the
entire length or width of the unit.
6.
Elevate the unit sufficiently to prevent any blockage of
the air entrances by snow in areas where there will be
snow ac-cumulation. Check the local weather bureau for
the expected snow accumulation in your area.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any
packaging until the unit is near the place of installation. Rig
the unit by attaching chain or cable slings to the lifting holes
provided in the base rails. Spreaders, whose length exceeds
the largest dimension across the unit, MUST be used across
the top of the unit.
035-14841-000 Rev. A (0701)
Unitary Products Group
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