Bryant 548D installation instructions Unit Voltage, 208/230 460 575, Stage

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Table 3 — Heat Anticipator Settings

 

 

 

 

 

 

 

UNIT VOLTAGE

 

 

 

 

 

 

 

 

 

208/230

 

 

 

460

 

 

 

 

575

 

 

UNIT

Heater

 

Configuration

Heater

 

Configuration

Heater

 

Configuration

 

 

 

2-Stage

 

 

 

2-Stage

 

 

 

2-Stage

 

kW*

1-Stage

kW*

1-Stage

 

kW*

1-Stage

 

 

Stage 1

Stage 2

 

Stage 1

Stage 2

 

Stage 1

Stage 2

 

 

 

 

 

 

 

 

 

 

 

 

 

10.4, 16.0

0.3

 

NA

NA

13.9, 16.5

0.3

 

 

NA

NA

17.0, 34.0

0.3

 

 

NA

NA

548D

24.8, 32.0

0.6

 

0.3

0.3

27.8, 33.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42.4, 50.0

0.9

 

0.6

0.3

41.7, 50.0

0.6

 

 

0.3

0.3

51.0

0.6

 

 

0.3

0.3

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

Fig. 10 — Defrost Board

4.On size 120 units, install vertical discharge block-off plate over duct openings. See Fig. 13.

5.Economizer is factory-installed in unit and secured with screws. See Fig. 14.

NOTE: Be sure rear economizer flange is engaged under tabs in vertical return-air opening.

6.To convert to horizontal discharge application:

a.Rotate the economizer 90 degrees until the econ- omizer motor faces the outdoor section (see Fig. 15).

b.Remove shipping screw and tape from baromet- ric damper and rotate the barometric relief damper hinge 90 degrees. Barometric relief damper should open vertically to operate properly.

c.Install horizontal discharge block-off plate over the opening on the access panel. (Block-off plate MUST be installed before installing hood assem- bly.) See Fig. 16.

7.Remove existing 12-pin blue and yellow wire jumper plug and store. Insert 12-pin economizer plug into economizer harness. See Fig. 14.

8.If ventilation air is not required, proceed to Step 9. If ventilation air is required, determine the minimum position setting for required airflow. See Fig. 17.

Adjust minimum position setting by loosening the screws on the position setting bracket. See Fig. 18. Slide bracket until the top screw is in the position determined by Fig. 17. Tighten screws.

9.Remove tape and shipping screw from outdoor-air thermostat (OAT). Fas-ten OAT to inside of hood using screws and speed clips provided. See Fig. 19. Make sure OAT terminals are positioned up.

10.Replace outdoor-air opening panel using screws from Step 2. Replace filter access panel. Ensure the filter access panel slides along the tracks and is securely engaged.

11.Fasten hood top and side plate assembly to outdoor- air opening panel with screws provided.

12.Place knob supplied with economizer on OAT. See Fig. 19. Set for 3° F below indoor room thermostat setting. If accessory enthalpy control (EC) is used in place of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 19.

13.Connect OAT per Fig. 20.

14.Slide outdoor-air inlet screen into screen track on hood side plate. While holding screen in place, fasten screen retainer to hood using screws provided.

NOTE: Refer to Fig. 21 for economizer barometric relief damper characteristics.

Fig. 11 — Panel Locations

12

Image 12
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 FLAElectrical Data Units With Electrical Convenience Outlet Min81/2 Tons FLA VI. Adjust FACTORY-INSTALLED Options Unit Voltage 208/230 460 575Stage Durablade Economizer Installation Durablade Economizer Damper Minimum Position Setting EconoMi$er Component Locations Rear EconoMi$er Flange Installation EconoMi$er Wiring Wiring Diagram for Power Exhaust System Default Potentiometer Settings VII. Adjust INDOOR-FAN SpeedChangeover Set Points Typical Belt-Drive Motor Mounting for Size Fan Rpm at Motor Pulley Settings Indoor-Fan Motor PerformanceUnit INDOOR-FAN Maximum Acceptable Continuous BHPFan Performance 548D090 Vertical Discharge Units Standard Motor Belt DriveFan Performance 548D102 Vertical Discharge Units Fan Performance 548D120 Vertical Discharge Units 548D120 10 Tons Standard and Alternate Motors Belt DriveFan Performance 548D090 Horizontal Discharge Units Fan Performance 548D102 Horizontal Discharge Units Fan Performance 548D120 Horizontal Discharge Units Standard and Alternate Motors Belt DriveInternal Wiring VI. Refrigerant Service PortsPRE-START-UP START-UP Unit PreparationIX. Adjust GAS Input XII. Safety ReliefCooling XI. HeatingService Cleaning Cooling, Units With EconoMi$erDefrost Indoor CoilII. Lubrication IV. Economizer Adjustment Refrigerant ChargeCooling Charging Chart 548D102 Troubleshooting Heating and Cooling TroubleshootingProblem Cause Remedy 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.