Bryant 581A operation manual III. Field Fabricate Ductwork, IV. Make Unit Duct Connections

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III. STEP 3 — FIELD FABRICATE DUCTWORK

On vertical units, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. Use flexible duct connectors between unit and ducts as required. Adequately insulate and weatherproof all ductwork located outdoors, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Insulate ducts passing through unconditioned space, and use vapor barrier in accor- dance with the latest issue of SMACNA (Sheet Metal and Air Conditioning Contractors National Association) and ACCA (Air Conditioning Contractors of America) minimum instal- lation standards for heating and air conditioning systems.

Ducts passing through an unconditioned space must be insu- lated and covered with a vapor barrier.

A minimum clearance to combustibles of 1 in. for the first 24 in. of ductwork is required for all units with electric heat. Cabinet return-air static shall not exceed –0.35 in. wg with economizer or –0.45 in. wg without economizer.

IV. STEP 4 — MAKE UNIT DUCT CONNECTIONS

Unit is shipped for thru-the-bottom duct connections. Duct- work openings are shown in Fig. 1, 4, and 5. Duct connections are shown in Fig. 6. Field-fabricated concentric

ductwork may be connected as shown in Fig. 7 and 8. Attach all ductwork to roof curb and roof curb basepans. Refer to installation instructions shipped with accessory roof curb for more information.

WARNING: For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90 degree turn in the return ductwork between the unit and the conditioned space. If a 90 degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space.

V.STEP 5 — INSTALL FLUE HOOD AND WIND BAFFLE

Flue hood, screen, and wind baffle are shipped secured under main control box. To install, secure flue hood and screen to access panel with screws provided. See Fig. 9. The wind baffle is then installed over the flue hood.

NOTE: When properly installed, flue hood will line up with combustion fan housing. See Fig. 10.

NOTE: Do not drill in this area; damage to basepan may result in water leak.

Fig. 6 — Air Distribution — Thru-the-Bottom (581A180, 240 Unit Shown)

NOTE: Dimensions A, A’, B and

B’ are obtained from field-supplied ceiling diffuser.

Shaded areas indicate block-off pans.

Fig. 8 — Concentric Duct Details

WIND BAFFLE

INLET LOUVERS

 

FLUE

 

SCREEN

NOTE: Do not drill in this area; damage to basepan may result in water

 

leak.

 

Fig. 7 — Concentric Duct Air Distribution

Fig. 9 — Flue Hood Location

(581A180, 240 Unit Shown)

 

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Contents Safety Considerations ContentsInstallation Provide Unit Support Roof Curb Details Roof Mount Alternate Unit SupportII. RIG and Place Unit PositioningBase Unit Dimensions 581A155 Base Unit Dimensions 581A240 Unit 581A Physical Data581A180, 240 Unit Shown Install Flue Hood and Wind BaffleIII. Field Fabricate Ductwork IV. Make Unit Duct ConnectionsVIII. Make Electrical Connections VII. Install GAS PipingField Power Supply VI. Trap Condensate DrainOptional Economizer Field Control WiringMake OUTDOOR-AIR Inlet Adjustments Manual Outdoor-Air DamperFLA LRA MCA Mocp Electrical Data25% Outdoor-Air Section Details Install OUTDOOR-AIR HoodSeal Strip Location Enthalpy Control InstallationMotormaster I Control Installation 581A155 and 180 Only XI. Install ALL AccessoriesUnit Preparation II. Service ValvesIV. Refrigerant Service Ports START-UPVIII. Evaporator FAN VI. Internal WiringXII. Accessory Economizer Adjustment VII. Crankcase HeatersBhp Brake Horsepower Fan Performance 581A180270 Low Heat Units Fan Performance 581A240270 Low Heat Units 753 915 844 1077 949 1287 1047 753 942 844 1101 949 Fan Performance 581A180360 High Heat Units Fan Performance 581A240360 High Heat Units Air Quantity Limits Evaporator Fan Motor SpecificationsAccessory/FIOP Economizer Static Pressure in. wg Fan RPM at Motor Pulley SettingXIV. Base Unit Operation XIII. GAS HeatService Cleaning II. Lubrication IV. Evaporator FAN Service and Replacement581A240 Units Fig Belt Tension AdjustmentVI. CONDENSER-FAN Adjustment 581A155 and 180 Units FigVIII. Power Failure VII. Economizer AdjustmentIX. Refrigerant Charge XIII. Protective Devices GAS Valve AdjustmentXI. Main Burners XII. Filter DrierXV. Control Circuit XVI. Replacement PartsXVII. Diagnostic Leds XIV. Relief DevicesSpark Gap Adjustment Typical Wiring Schematic and Typical Component Arrangement Typical Wiring Schematic 581A180, 208/230 V Unit Shown Typical Component Arrangement 581A180 Shown Cooling Service Analysis TroubleshootingProblem Cause Remedy Burners will not ignite Heating Service AnalysisIGC Control Heating and Cooling Call for Free Catalog Packaged Service TrainingPage General TemperaturesElectrical Pressures
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581A specifications

The Bryant 581A is a pivotal model in the realm of heating, ventilation, and air conditioning (HVAC) systems, known for its robust performance and energy efficiency. As part of the Bryant product lineup, the 581A offers a blend of innovative technologies combined with reliable engineering, making it a suitable choice for both residential and light commercial applications.

One of the standout features of the Bryant 581A is its outstanding energy efficiency. With a Seasonal Energy Efficiency Ratio (SEER) rating of up to 16, this model meets Energy Star qualifications, ensuring that homeowners can enjoy lower utility bills while helping to reduce their environmental footprint. The efficiency is further enhanced by the unit’s environmentally friendly refrigerant, which not only improves performance but also aligns with modern sustainability standards.

Another key characteristic of the Bryant 581A is its durable construction. Designed to withstand various weather conditions, the unit features a robust cabinet that protects internal components. This durability not only prolongs the lifespan of the system but also minimizes the need for frequent maintenance or repairs. The coil design is optimized for heat transfer efficiency, enhancing the unit's overall performance in both cooling and heating modes.

In terms of technology, the Bryant 581A incorporates advanced control systems that enable precise temperature regulation. The multi-stage cooling capabilities ensure that the system can adapt to varying temperature demands, providing comfort in all seasons. Additionally, the model is compatible with smart thermostats, allowing homeowners to control their HVAC system remotely via smartphone or other connected devices.

Noise reduction is another aspect where the Bryant 581A excels. Equipped with a variable-speed compressor and sound-dampening features, this model operates quietly, minimizing disruption in residential or office environments. This focus on acoustic comfort makes it an ideal choice for those who value a peaceful living or working space.

Overall, the Bryant 581A represents an excellent balance of efficiency, durability, and modern technology. With features aimed at enhancing user comfort and reducing operational costs, it stands out as a reliable solution in the competitive HVAC market. Whether for new installations or replacements, the Bryant 581A is a testament to the brand’s commitment to quality and innovation in home climate control.
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