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WARNING: Before performing service or maintenance
operations on unit, turn off gas supply then unit main
power switch. Electrical shock or explosion could cause
serious injury or death.
CAUTION: Puron (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22
service equipment or components on Puron (R-410A)
equipment. Ensure service equipment is rated for Puron
(R-410A).
A. General
The 583B units (see Fig. 1) are fully self-contained, combination
Category I gas heating/electric cooling units designed for outdoor
installation. See Fig. 6 and 7 for unit dimensions. All unit sizes
have discharge openings for both horizontal and downflow con-
figurations, and are factory shipped with all downflow duct
openings covered . Units may be installed either on a rooftop,
cement slab, or directly on the ground (if permitted by local
codes). See Figs. 4 and 5 for roof curb dimensions.
Models with an N in the thirteenth position of the model number
are dedicated Low NO
x
units designed for California installation.
These models meet the California maximum oxides of nitrogen
(NO
x
) emissions requirements of 40 nanograms/joule or less as
shipped from the factory and must be installed in California Air
Quality Management Districts where a Low NO
x
rule exists.
RECEIVING AND INSTALLATION
I. CHECK EQUIPMENT
IDENTIFY UNIT — The unit model number and serial number
are stamped on unit identification plate. Check this information
against shipping papers and job data.
INSPECT SHIPMENT — Inspect for shipping damage while unit
is still on shipping pallet. If unit appears to be damaged or is torn
loose from its anchorage, have it examined by transportation
inspectors before removal. Forward claim papers directly to
transportation company. Manufacturer is not responsible for any
damage incurred in transit.
Check all items against shipping list. Immediately notify the
nearest Bryant Air Conditioning office if any item is missing.
To prevent loss or damage, leave all parts in original packages
until installation.
II. PROVIDE UNIT SUPPORT
ROOF CURB — Install accessory roof curb in accordance with
instructions shipped with curb. See Figs. 4 and 5 and Table 1 for
roof curb dimensions. Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing can also result in
air leaks and poor unit performance.
Curb should be level to within 1 /4 inch. This is necessary for unit
drain to function properly. Refer to accessory roof curb installation
instructions for additional information as required (see Fig. 2).
SLAB MOUNT — Place the unit on a solid, level concrete pad
that is a minimum of 4 in. thick with 2 in. above grade. The slab
should be flush on the compressor end of the unit (to allow
condensate drain installation) and should extend 2 in. on the three
remaining sides of the unit. See Fig. 3. Do not secure the unit to the
slab except when required by local codes.
GROUND MOUNT — The unit may be installed either on a slab
or placed directly on the ground if local codes permit. Place the
unit on level ground prepared with gravel for condensate dis-
charge.
III. FIELD FABRICATE DUCTWORK
Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to unit. For horizontal
applications, unit is provided with flanges on the horizontal
openings. All ductwork should be secured to the flanges. Insulate
and weatherproof all external ductwork, joints, and roof openings
with counter flashing and mastic in accordance with applicable
codes.
Ducts passing through an unconditioned space must be insulated
and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should be
ducted through the roof deck to comply with applicable fire codes.
A minimum clearance is not required around ductwork. Cabinet
return-air static shall not exceed -.25 in. wg.
Fig. 2—Unit Leveling Tolerances
C99065
A
B
C
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B B-C A-C
1/4 1/4 1/4
Fig. 3—Slab Mounting Details
C99014
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
EVAP.
COIL
COND.
COIL
2"
(50.8mm)
—2—