Bryant Belt Tension Adjustment, VI. CONDENSER-FAN Adjustment, 581A155 and 180 Units Fig

Page 27

10. Disconnect wiring connections and remove the 4 mounting bolts.

11. Remove the motor.

12. To install the new motor, reverse Steps 1-11.

V. BELT TENSION ADJUSTMENT

To adjust belt tension:

1. Loosen fan motor bolts.

2. Size 155 Units:

Move motor mounting plate up or down for proper belt tension (1/2 in. deflection with one finger).

Size 180 and 240 Units:

Turn motor jacking bolt to move motor mounting plate up or down for proper belt tension (3/8 in. deflec- tion at midspan with one finger [9 lb force]).

3. Tighten nuts.

4. Adjust bolts and nut on mounting plate to secure motor in fixed position.

VI. CONDENSER-FAN ADJUSTMENT

A. 581A155 and 180 Units (Fig. 33)

1.

Shut off unit power supply.

2.

Remove access panel(s) closest to the fan to be

 

adjusted.

3.

Loosen fan hub setscrews.

4.

Adjust fan height on shaft using a straightedge

Fig. 31 — 581A155 Evaporator-Fan Motor Adjustment

placed across the fan orifice.

 

5.

Tighten setscrews and replace panel(s).

6.

Turn on unit power.

B. 581A240 Units (Fig. 34)

1.

Shut off unit power supply.

2.

Remove fan top-grille assembly and loosen fan hub

 

screws.

3.

Adjust fan height on unit, using a straightedge

 

placed across the fan orifice.

NOTE: A 31/2-in. bolt and threaded plate are included in the installer’s packet. They should be added to the motor support channel below the motor mounting plate to aid in raising the motor. The plate part number is 50DP503842. The adjustment bolt is 3/8 - 16 x 13/4-in. LG.

Fig. 32 — 581A180 and 240 Evaporator-Fan Motor Section

6.Remove jacking bolt and tapped jacking bolt plate.

7.Remove the 2 screws that secure the motor mounting plate to the motor support channel.

8.Remove the 3 screws from the end of the motor sup- port channel that interfere with the motor slide path.

9.Slide out the motor and motor mounting plate.

NOTE: Dimension is in inches.

Fig. 33 — Condenser Fan Adjustment, 581A155 and 180

NOTE: Dimension is in inches.

Fig. 34 — Condenser Fan Adjustment, 581A240

—27—

Page 26 Page 28
Image 27
Page 26 Page 28
Contents Contents Safety ConsiderationsInstallation 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 FigVII. Economizer Adjustment VIII. Power FailureIX. 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 Troubleshooting Cooling Service AnalysisProblem Cause Remedy Burners will not ignite Heating Service AnalysisIGC Control Heating and Cooling Call for Free Catalog Packaged Service TrainingPage General TemperaturesElectrical Pressures
Related manuals
Manual 56 pages 3.06 Kb

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.
Top Page Image Contents