Bryant 548J*14D installation instructions Units Without Factory-Installed Disconnect

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Units Without Factory-Installed Disconnect —

When installing units, provide a disconnect switch of adequate size per NEC (National Electrical Code). Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

Units with Factory-Installed Disconnect —

a125-volt GFCI (ground-fault circuit-interrupter) duplex receptacle rated at 15-A behind a hinged waterproof access cover, located on the panel beneath the control box. See Fig. 23.

Pwd-CO

Fuse

Switch

The factory-installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel. Discard the factory test leads (see Fig. 22). The factory disconnect is an 80A disconnect.

Units Without Disconnect Option

TB1

11 13 13

Disconnect

Convenience

Outlet

GFCI

Disconnect

Access Panel

Pwd-CO

548J*14D

Transformer

 

 

C10361

per

NEC

L1 L2 L3

208/230-3-60

460-3-60

575-3-60

Units With Disconnect Option

L121

Optional

L2

4

Disconnect

3

Factory

Wiring

 

 

Switch

 

 

 

 

 

L3

6

 

5

 

Disconnect factory test leads; discard.

C10015

Fig. 22 - Power Wiring Connections

Convenience Outlets —

!WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Tag-out this switch, if necessary.

Two types of convenience outlets are offered on 548J*14D models: non-powered and unit-powered. Both types provide

Fig. 23 - Convenience Outlet Location

Non-powered type: This type requires the field installation of a general-purpose 125-volt 15-A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size and conduit requirements, fuse or breaker requirements and disconnect switch size and location. Route 125-v power supply conductors into the bottom of the utility box containing the duplex receptacle.

Unit-powered type: A unit-mounted transformer is factory-installed to stepdown the main power supply voltage to the unit to 115-v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the panel beneath the control box. See Fig. 23.

The primary leads to the convenience outlet transformer are not factory-connected. Selection of primary power source is a customer-option. If local codes permit, the transformer primary leads can be connected at the line-side terminals on the unit-mounted non-fused disconnect or HACR breaker switch; this will provide service power to the unit when the unit disconnect switch or HACR switch is open. Other connection methods will result in the convenience outlet circuit being de-energized when the unit disconnect or HACR switch is open. See Fig. 24. On a unit without a unit-mounted disconnect, connect the source leads to the main terminal block (TB1).

If the convenience outlet transformer is connected to the line side of a field disconnect, the conduit provided with the unit must be used to protect the wire as they are routed from the transformer to the field disconnect. The end of the conduit with the straight connector attaches to the field disconnect. The other end does not need to connect o

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing Size 14 Unit Plan for Unit Location Service Clearance Dimensional DrawingInspect Unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Field Fabricate Ductwork For Units with Accessory Electric HeatersRig and Place Unit Install Outside Air Hood Convert to Horizontal and Connect Ductwork when requiredEconomizer Hood Removal and Setup Factory Option Positioning on CurbDamper Assembly Economizer Hood and Two-Position Hood Install External Condensate Trap and LineMake Electrical Connections Field Power SupplyMounting Position for Field Disconnects Over 100A Units with Factory-Installed Disconnect Units Without Factory-Installed DisconnectUnit Powered Convenience Outlet Wiring Factory-Option Thru-Base Connections Field Control WiringThermostat Units without Thru-Base ConnectionsUnit without Thru-Base Connection Kit Heat Anticipator SettingsHeater and Supplementary Fuses Single Point BoxesHeater Low-Voltage Control Connections Return Air Enthalpy Sensor Outdoor Air Enthalpy Control PNO 33CSENTHSWDifferential Enthalpy Control RTU-MP Control System RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Supply Air Temperature SAT SensorSpace Temperature SPT Sensors Outdoor Air Temperature OAT SensorField Connections EconoMi$er2Indoor Air Quality CO2 sensor RTU-MP T-56 Sensor ConnectionsOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Connecting Discrete InputsWeatherproof enclosure Local Access Communication Wiring ProtocolsRTU-MP Troubleshooting GeneralLEDs on the RTU-MP show the status of certain functions LEDsSystem Smoke DetectorsController SensorSupply Air Smoke Detector LocationsReturn Air with Economizer Return Air Detector Shipping Position Completing Installation of Return Air Smoke SensorNone Unit Wire/Fuse or Hacr Breaker Sizing DataPwrd C.O EconoMi$er IV Occupancy Switch Adjust Factory-Installed OptionsPre-Start and Start-Up Install Accessories548J*14D 548J*14D Catalog No. II548J---07

548J*14D specifications

The Bryant 548J*14D is a highly efficient and versatile air conditioning unit designed to meet the varying demands of residential and light commercial applications. This model stands out due to its advanced engineering, energy-saving features, and reliable performance, making it an ideal choice for homeowners looking to enhance comfort without compromising on energy efficiency.

One of the main features of the Bryant 548J*14D is its excellent SEER (Seasonal Energy Efficiency Ratio) rating, which signifies its ability to provide cooling while consuming less energy. Optimized for efficiency, this unit employs a high-efficiency compressor that adjusts its output based on cooling demands, allowing it to use only the energy necessary to maintain a comfortable environment.

The unit’s all-aluminum evaporator coil ensures durability and resistance to corrosion, contributing to its longer lifespan and consistent performance. Additionally, the Bryant 548J*14D incorporates advanced refrigeration technologies for maximum heat transfer efficiency. This technology not only enhances cooling performance but also improves overall system reliability.

A key characteristic of the Bryant 548J*14D is its Whisper Series technology designed for quiet operation. The low-noise design minimizes sound levels, allowing for unobtrusive cooling in residential spaces while still ensuring effective airflow and cooling capacity. This makes it particularly favorable for installation in bedrooms and other noise-sensitive areas.

Another noteworthy aspect of the Bryant 548J*14D is its compatibility with the MyBryant smartphone app, which enables homeowners to monitor and control their HVAC systems remotely. This connectivity offers convenience and helps to optimize energy usage, as users can adjust settings based on their schedules and preferences.

Furthermore, the Bryant 548J*14D is designed with a robustness that allows it to withstand diverse weather conditions, ensuring reliable performance even in extreme climates. The unit’s compact design eases installation in various settings, whether it's on rooftops, near walls, or on concrete pads.

In summary, the Bryant 548J*14D is a cutting-edge air conditioning unit that combines energy efficiency, quiet operation, and advanced technologies. With its robust construction, smart features, and reliable performance, it stands as a valuable solution for anyone looking to enhance comfort and save on energy costs in their homes or light commercial environments.
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