Bryant DURAPAC PLUS 581B ユーザーズマニュアル

Form No. PDS580F-36-4

Standard efficiency units (580F072, 090, 120, 150 and
579F180-300) are available. Standard efficiency units
(580F036-060, 073, 091,103,121,151, and 180-300) that meet
ASHRAE 90.1-04 minimum energy efficiency requirements are
also available. High efficiency units (581C024-060, 581B036-
150 and 581A155-300) well exceed ASHRAE 90.1-04 energy
efficiency requirements and must comply with Energy Star high
efficiency requirements. Gas heating with electric cooling roof-
tops offer:

• Pre-painted galvanized steel cabinet for long life and quality

appearance

• Commercial strength base rails with built-in rigging capability
• Convertible design for vertical or horizontal supply/return

(024-151 field convertible, factory supplied vertical supply/
return and 210-300 discrete configuration only)

• Non-corrosive, sloped condensate drain pan, meets

ASHRAE 62 (IAQ)

• Two-inch return-air filters
• A wide assortment of factory-installed options available,

including high-static drives that provide additional perfor-
mance range

• Factory-installed optional gear driven EconoMi$er IV (vertical

return for sizes 024-151 only) for use with standard rooftop
unit controls (includes CO

2

 sensor control capability)

• Factory-installed optional gear driven EconoMi$er2 (vertical

return only) for use with third party DDC controls (includes
4 to 20 mA actuator for demand control ventilation)

• Perfect Humidity™ dehumidification package (581C036-060

and 581B036-150 only)

• Hot gas reheat dehumidification package (581A181-300 only)

Heat Options

• Exclusive integrated gas control board with diagnostics
• Alumagard™ heat exchanger coating

• Induced-draft fan for gas combustion
• Tubular, dimpled heat exchangers

• Natural gas
• LP conversion kits
• Low NO

X

 (size 024-060 only)

• Optional type 409 stainless steel heat exchangers.

Every compact one-piece unit arrives fully assembled,
charged, tested, and ready to run.

GAS HEAT MODELS — All ignition components are contained
in the compact IGC (integrated gas controller) which is easily
accessible for servicing. The IGC control board, designed and
manufactured exclusively for Bryant rooftop units, provides
built-in diagnostic capability. An LED (light-emitting diode) sim-
plifies troubleshooting by providing visual fault notification and
required system status confirmation.

The IGC also contains an exclusive anti-cycle protection for
gas heat operation. After 4 continuous cycles on the unit high-
temperature limit switch, the gas heat operation is disabled,
and an error code is issued. This feature greatly improves reli-
ability of the rooftop unit.

The IGC also contains burner control logic for accurate and
dependable gas ignition. The LED is visible without removing
the unit control box access panel. This LED fault-notification
system reduces service person troubleshooting time and mini-
mizes service costs. The IGC also maximizes heating effi-
ciency by controlling evaporator-fan on and off delays.

Tubular, dimpled gas heat exchangers optimize heat transfer
for improved efficiency. The tubular design permits hot gases
to make multiple passes across the path of the supply air. The
dimpled design creates a turbulent gas flow to maximize heat-
ing efficiency.

2 to 25 Tons

48-910df

a48-8207

50-1242f

50-1214df

a48-5997

48-831df