Bryant 548D installation instructions Typical Belt-Drive Motor Mounting for Size

Page 20

5.Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley flange).

To align fan and motor pulleys:

1.Loosen fan pulley setscrews.

2.Slide fan pulley along fan shaft.

3.Make angular alignment by loosening motor from mounting plate.

To adjust belt tension:

1.Loosen fan motor mounting plate nuts.

2.Units 090,102 — Slide motor mounting plate away from fan scroll for proper belt tension (1/2-in. deflection with 5 to 10 lbs of force) and tighten mounting nuts with 10 lbs torque (see Fig. 36).

Unit 120 — Slide motor mounting plate downward to tighten belt tension (1/2-in. deflection with 5 to 10 lbs of force). Secure motor mounting plate nuts with 10 lbs of torque. See Fig. 37.

3.Adjust bolt and nut on mounting plate to secure motor in fixed position.

Realign fan and motor pulleys:

1.Loosen fan pulley setscrews.

2.Slide fan pulley along fan shaft.

3.Make angular alignment by loosening motor from mounting plate.

Fig. 37 — Typical Belt-Drive Motor

Mounting for Size 120

MOTOR MOUNTING

PLATE NUTS

Fig. 38 — Indoor-Fan Pulley Adjustment

Fig. 36 — Typical Belt-Drive Motor Mounting for Sizes 090 and 102

20

Image 20
Contents Contents Safety ConsiderationsInstallation Provide Unit SupportRoof Curb Details III. Install Condensate Drain Line and External Trap II. Field Fabricate DuctworkIV. RIG and Place Unit PositioningUnit MAX Dimensions Weight Base Unit Dimensions Physical Data Unit Size 548DField Power Supply Make Electrical Connections575-3-60 460-3-60Electrical Data Units Without Electrical Convenience Outlet SIZE†Type RLA LRA FLA81/2 Tons Electrical Data Units With Electrical Convenience OutletMin FLA VI. Adjust FACTORY-INSTALLED Options Stage Unit Voltage208/230 460 575 Durablade Economizer Installation Durablade Economizer Damper Minimum Position Setting EconoMi$er Component Locations Rear EconoMi$er Flange Installation EconoMi$er Wiring Wiring Diagram for Power Exhaust System Changeover Set Points Default Potentiometer SettingsVII. Adjust INDOOR-FAN Speed Typical Belt-Drive Motor Mounting for Size Fan Rpm at Motor Pulley Settings Indoor-Fan Motor PerformanceUnit INDOOR-FAN Maximum Acceptable Continuous BHPFan Performance 548D090 Vertical Discharge Units Standard Motor Belt DriveFan Performance 548D102 Vertical Discharge Units Fan Performance 548D120 Vertical Discharge Units 548D120 10 Tons Standard and Alternate Motors Belt DriveFan Performance 548D090 Horizontal Discharge Units Fan Performance 548D102 Horizontal Discharge Units Fan Performance 548D120 Horizontal Discharge Units Standard and Alternate Motors Belt DriveInternal Wiring VI. Refrigerant Service PortsPRE-START-UP START-UP Unit PreparationIX. Adjust GAS Input XII. Safety ReliefCooling XI. HeatingService Cleaning Cooling, Units With EconoMi$erDefrost Indoor CoilII. Lubrication IV. Economizer Adjustment Refrigerant ChargeCooling Charging Chart 548D102 Problem Cause Remedy TroubleshootingHeating and Cooling Troubleshooting Durablade Economizer Troubleshooting IFCIFO OATDamper does not open EconoMi$er operation limitedTo minimum position Damper positionTypical Wiring Diagram Must Voltage Page START-UP Checklist TemperaturesPreliminary Information III. START-UP Electrical

548D specifications

The Bryant 548D heat pump stands out in the HVAC market for its robust performance, energy efficiency, and advanced technology. Known for its reliability, this particular model is designed to provide optimal heating and cooling for both residential and light commercial applications.

One of the standout features of the Bryant 548D is its variable-speed compressor, which allows for precise temperature control and enhances comfort levels in any environment. This technology enables the 548D to operate efficiently at different speeds, adjusting its output based on the heating or cooling demand. As a result, homeowners can enjoy consistent temperature regulation without the wide fluctuations typical of single-stage systems.

In addition to the variable-speed compressor, the Bryant 548D utilizes advanced refrigerant technology. It employs the environmentally friendly Puron refrigerant, which not only improves the unit's efficiency but also reduces its carbon footprint. This makes the 548D a sustainable choice for those looking to minimize their environmental impact while still enjoying superior heating and cooling performance.

Another key characteristic of the Bryant 548D is its impressive energy efficiency rating, often exceeding the minimum requirements set by the Department of Energy. With a high Seasonal Energy Efficiency Ratio (SEER) for cooling in warmer months and an excellent Heating Seasonal Performance Factor (HSPF), the 548D minimizes energy consumption while maximizing comfort.

The 548D also features Quiet Operation technology, ensuring that the system runs quietly in the background without disrupting daily activities. This is particularly beneficial for light commercial spaces or homes where noise can be a concern. The sleek design and compact size make the unit easy to install in various settings without occupying excessive space.

Furthermore, Bryant incorporates advanced smart technology within the 548D model. The system can be integrated with smart thermostats, allowing users to monitor and control their heating and cooling settings remotely. This feature not only enhances convenience but also enables homeowners to program their systems for maximum efficiency.

In conclusion, the Bryant 548D heat pump is an exceptional choice for those seeking a reliable, efficient, and technologically advanced heating and cooling solution. Its combination of variable-speed compression, eco-friendly refrigerant, high energy efficiency, and quiet operation positions it well in the competitive HVAC market, making it a top choice for both residential and light commercial applications. By investing in the Bryant 548D, consumers can enjoy superior comfort and lower energy bills year-round.