LIMITATIONS
These units must be installed in accordance with the current
editions 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.
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).
LOCATION
Use the following guidelines to select a suitable location for
these units.
1. Unit is designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of air.
Where a choice of location is possible, position the unit on
either north or east side of building.
WARNING: Excessive exposure of this furnace to contami-
nated combustion air may result equipment dam-
age or personal injury. Typical contaminates
include: permanent wave solutions, chlorinated
waxes 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, ce-
ments 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. 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.
CAUTION: 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 contact 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
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
openings 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.
CAUTION: An adhesive backed label is provided over the
outside of the combustion air inlet opening to pre-
vent moisture from entering the unit which could
cause damage to electrical components. Allow this
closure label to remain in place until the combus-
tion air hood is to be installed (refer to Figure 5).
Refer to Table 5 for unit weights and to Figure 8 for approximate
center of gravity.
CLEARANCES
All units require certain clearances for proper operation and
service. Installer must make provisions for adequate combustion
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 construction, servicing,
and proper unit operation.
WARNING: Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet, combustion
air inlet or vent outlet.
DUCTWORK
Ductwork should be designed and sized according to the methods
in Manual Q of the Air Conditioning Contractors of America (ACCA).
A closed return duct system shall be used. This shall not preclude
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.
INSTALLATION
UNIT SIZE
036
048
060
072
Voltage Variation
Min. / Max.
1
208/230V
187 / 253
460V
414 / 504
575V
518/630
Supply Air CFM, Nom.
1200
1600
2000
2400
Wet Bulb Temperature (
°
F) of
Air on Evaporator Coil,
Min. / Max.
57 / 72
57 / 72
57 / 72
57 / 72
Dry Bulb Temperature (
°
F) of
Air on Condenser Coil,
Min.
2
/ Max.
45 / 120 45 / 120 45 / 120 45 / 120
1
Utilization range “A” in accordance with ARI Standard 110.
2
A low ambient accessory is available for operation down to 0
°
F.
TABLE 1 - UNIT APPLICATION DATA
530.18-N8Y
Unitary Products Group
3
