035-13329-001-B-0504
Unitary Products Group
5
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 accumulation. 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.
BEFORE LIFTING A UNIT, MAKE SURE THAT ITS
WEIGHT IS DISTRIBUTED EQUALLY ON THE CABLES
SO THAT IT WILL LIFT EVENLY.
Units may also be moved or lifted with a forklift. Slotted open-
ings in the base rails are provided for this purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 42".
Remove the nesting brackets from the four corners on top of
the unit. All screws that are removed when taking these
brackets off must be replaced on the unit.
Units may also be moved or lifted with a forklift. Slotted open-
ings in the base rails are provided for this purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 42".
Remove the nesting brackets from the four corners on top of
the unit. All screws that are removed when taking these
brackets off must be replaced on the unit.
Refer to Table 4 for unit weights and to Figure 1 for approxi-
mate center of gravity.
CLEARANCES
All units require certain clearances for proper operation and
service. Installer must make provisions for adequate combus-
tion and ventilation air in accordance with Section 5.3, Air for
Combustion and Ventilation of the National Fuel Gas Code,
ANSI Z223.1 (in U.S.A.) or Sections 7.2, 7.3 or 7.4 of Gas
Installation Codes CAN/CGA-B149.1 and .2 (in Canada) and/
or applicable provisions of the local building codes. Refer to
Figure 9 for the clearances required for combustible con-
struction, servicing, and proper unit operation.
DUCTWORK
Ductwork should be designed and sized according to the
methods in the manuals of the Air Conditioning Contractors
of America (ACCA).
A closed return duct system shall be used. This shall not pre-
clude use of economizers or outdoor fresh air intake. The
supply and return air duct connections at the unit should be
made with flexible joints to minimize the transmission of
noise.
The supply and return air duct systems should be designed
for the CFM and static requirements of the job. They should
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.
An adhesive backed label is provided over the out-
side of the combustion air inlet opening to prevent
moisture from entering the unit which could cause
damage to electrical components. Allow this clo-
sure label to remain in place until the combustion
air hood is to be installed (refer to Figure 6).
FIGURE 1 - CENTER OF GRAVITY
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet, combus-
tion air inlet or vent outlet.
Front
Approximate
Center of
Gravity
A
B
44-7/8"
82-1/4"
3, 4, 5 Ton
19-3/4"
40-3/4"
Dim.
A
B
Condenser
Coil End
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