Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B User Manual

COMMERCIAL
SINGLE PACKAGE ROOFTOP
GAS HEAT/ELECTRIC COOLING
UNITS
Bryant has designed the DuraPac Plus series based on
customer needs and requests to be the most efficient and reli-
able ever.

FEATURES/BENEFITS

• Efficient rooftop line for cooling using scroll compressor
technology
• Efficient rooftop line for heating using dimpled heat
exchangers
• High reliability — non-corrosive condensate pans, prepainted
cabinets and primed interior panels, and all units are fully
protected by internal safeties
• Quiet operation — isolated compressor plate. All compres-
sors mounted on independent vibration isolators. Standard,
belt-driven evaporator fan motors on all units
• Ease of maintenance achieved by self diagnostics on the
Integrated Gas Controller (IGC), standard size filters, no tool
filter access, simple compressor access, permanently lubri-
cated fan motors, optional disconnect switch, optional hinged
access panels, and optional 115-v convenience outlet
• Performance and comfort enhancing options — High-static
motors and Perfect Humidity™ dehumidification package.
BRYANT MEANS TOP QUALITY AND RELIABILITY —
Each component utilized in the DuraPac Plus series is
designed and tested for a minimum of 15 years operation
under the harshest conditions.
Every unit is thoroughly run tested at the factory in each oper-
ating mode and evacuated prior to final charging. Every coil is
leak-tested with helium particles. Automated run testing allows
accurate undisputed tests and measurements which are sec-
ond to none in the industry.
Each unit contains a factory printout indicating tested pres-
sures, amperages, dates, and inspectors, providing certifica-
tion of the unit's status at the time of manufacture.
Units are equipped with valuable safety controls designed to
monitor and protect for the life of the unit. The standard safe-
ties include:
• low-pressure/loss-of-charge switch
Unit 581B036-072
Unit 581B090-150
• high-pressure switch
• freeze-protection thermostat
• internal compressor overload
• exclusive Cycle-LOC™ circuit board that prevents compres-
sor cycling
• refrigerant filter drier
The cabinet is constructed of galvanized steel, bonderized and
coated with a prepainted baked enamel finish. The paint finish
is a non-chalking type, and is capable of exceeding Federal
Test Method Standard No. 141 (Method 6061) 500-Hour Salt
Spray Test. In addition, all cabinet interior surfaces are primed,
allowing the entire unit to have a longer life and more attractive
appearance.

EASY MAINTENANCE AND INSTALLATION

All Units are Factory Shipped in the Vertical Discharge
Configuration for fit-up to standard roof curbs. (One acces-
sory curb fits sizes 036-072; another accessory curb fits
sizes 090-150.) Contractors can order and install the roof curbs
early in the construction stage, before decisions on size
requirements have been made.
All Units Feature Heavy-Gage Roll-Formed Baserail design
with forklift slots on 3 sides of the unit and rigging holes for
easier maneuvering and installation. Stretch-wrap packaging
protects the unit during shipment and storage.
Units are Easily Converted from vertical to horizontal applica-
tions to make retrofit and add-on jobs easier. To convert from
vertical to horizontal discharge, simply relocate 2 panels. The
same basic unit can be used for a variety of applications and
can be quickly modified at the jobsite.
Standard high-performance, belt-driven, evaporator-fan motors
enable 581B036-150 units to operate in most ductwork
configurations.
Ductwork Connections are Made Easy by the logical 2 to 1
aspect ratio. On vertical discharge units, ductwork attaches
directly to the roof curb.
Model 581B
DuraPac Plus Series
Sizes 036-150
3 to 12 1 / Tons
2
Form No. PDS 581B.36.5