Bryant 548D installation instructions Fla

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LEGEND AND NOTES FOR TABLES 2A AND 2B

 

LEGEND

FLA

— Full Load Amps

HACR

— Heating, Air Conditioning and Refrigeration

IFM

— Indoor-Fan Motor

% Voltage Imbalance

max voltage deviation from average voltage

= 100 x

average voltage

LRA

— Locked Rotor Amps

MCA

— Minimum Circuit Amps

MOCP

— Maximum Overcurrent Protection

NEC

— National Electrical Code

OFM

— Outdoor-Fan Motor

RLA

— Rated Load Amps

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage =

452 + 464 + 455

3

*Heaters are field installed only.

†Used to determine minimum disconnect per NEC.

**Heater capacity (kW) is based on heater voltage of 208 v, 240 v, or 480 v and 575 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

1371

=

3

= 457

Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

††Fuse or HACR circuit breaker.

Optional disconnect switch is unavailable. (Applies to units with an FLA greater or equal to 80.)

NOTES:

% Voltage Imbalance = 100 x

= 1.53%

7

457

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, con- tact your local electric utility company immediately.

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Contents Installation ContentsSafety Considerations Provide Unit SupportRoof Curb Details IV. RIG and Place Unit III. Install Condensate Drain Line and External TrapII. Field Fabricate Ductwork PositioningUnit MAX Dimensions Weight Base Unit Dimensions Physical Data Unit Size 548D575-3-60 Field Power SupplyMake Electrical Connections 460-3-60Type Electrical Data Units Without Electrical Convenience OutletSIZE† RLA LRA FLAMin Electrical Data Units With Electrical Convenience Outlet81/2 Tons FLA VI. Adjust FACTORY-INSTALLED Options 208/230 460 575 Unit VoltageStage Durablade Economizer Installation Durablade Economizer Damper Minimum Position Setting EconoMi$er Component Locations Rear EconoMi$er Flange Installation EconoMi$er Wiring Wiring Diagram for Power Exhaust System VII. Adjust INDOOR-FAN Speed Default Potentiometer SettingsChangeover Set Points Typical Belt-Drive Motor Mounting for Size Unit INDOOR-FAN Maximum Acceptable Fan Rpm at Motor Pulley SettingsIndoor-Fan Motor Performance Continuous BHPFan Performance 548D090 Vertical Discharge Units Standard Motor Belt DriveFan Performance 548D102 Vertical Discharge Units Fan Performance 548D120 Vertical Discharge Units 548D120 10 Tons Standard and Alternate Motors Belt DriveFan Performance 548D090 Horizontal Discharge Units Fan Performance 548D102 Horizontal Discharge Units Fan Performance 548D120 Horizontal Discharge Units Standard and Alternate Motors Belt DrivePRE-START-UP Internal WiringVI. Refrigerant Service Ports START-UP Unit PreparationCooling IX. Adjust GAS InputXII. Safety Relief XI. HeatingDefrost Service CleaningCooling, Units With EconoMi$er Indoor CoilII. Lubrication IV. Economizer Adjustment Refrigerant ChargeCooling Charging Chart 548D102 Heating and Cooling Troubleshooting TroubleshootingProblem Cause Remedy IFO Durablade Economizer TroubleshootingIFC OATTo minimum position Damper does not openEconoMi$er operation limited Damper positionTypical Wiring Diagram Must Voltage Page Preliminary Information START-UP ChecklistTemperatures 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.
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