Bryant 574B Installation Instructions

2
Recognize safety information. This is the safety--alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand
these signal words: DANGER, WARNING, and CAUTION.
These words are used with the safety--alert symbol. DANGER
identifies the most serious hazards which will result in severe per-
sonal injury or death. WARNING signifies hazards which could
result in personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury or
product and property damage. NOTE is used to highlight sugges-
tions which will result in enhanced installation, reliability, or op-
eration.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off main
power to system. There may be more than one disconnect
switch. Turn off accessory heater power switch if
applicable.
!
WARNING
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
A qualified installer or agency must use only
factory--authorized kits or accessories when modifying this
product.
WARNING
!
INTRODUCTION
The 574B unit (see Fig. 1) is a fully self--contained, combination
Category I gas heating/electric cooling unit designed for outdoor
installation (See Fig. 2 and 3 for unit dimensions). All unit sizes
have return and discharge openings for both horizontal and
downflow configurations, and are factory shipped with all
downflow duct openings covered. Units may be installed either
on a rooftop, a cement slab, or directly on the ground, if local
codes permit (See Fig. 4 for roof curb dimensions).
Models with an N in the thirteenth position of the model number
are dedicated Low NOx units designed for California
installations. These models meet the California maximum oxides
of nitrogen (NOx) emissions requirements of 40 nanograms/joule
or less as shipped from the factory and must be installed in
California Air Quality Management Districts or any other regions
in North America where a Low NOx rule exists.
RECEIVING AND INSTALLATION
Step 1 — Check Equipment
IDENTIFY UNIT
The unit model number and serial number are stamped on the unit
information plate. Check this information against shipping papers.
INSPECT SHIPMENT
Inspect for shipping damage while unit is still on shipping pallet. If
unit appears to be damaged oris 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 equipment
distribution office if any item is missing. To prevent loss or damage,
leave all parts in original packages until installation.
Step 2 — Provide Unit Support
For hurricane tie downs, contact distributor for details and PE
(Professional Engineering) Certificate if required.
ROOFCURB
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4). 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 water tight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing also can result
in air leaks and poor unit performance.
Curbshould be levelto within 1/4 in. Thisis necessary for unit drain
to function properly. Refer to accessory roof curb installation
instructions for additional information as required.
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. 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 discharge.
Step 3 — 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. wc.
574B

Bryant 574B Specifications

General

Brand	Bryant
Model	574B
Category	Gas Heater
Language	English