Bryant 548J*14D Field Connections, Outdoor Air Temperature OAT Sensor, EconoMi$er2

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548J*14D

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory-mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 —

The RTU-MP control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU-MP control; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field-installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors) Space CO2 sensor

Outdoor air CO2 sensor

Field Connections

Field connections for accessory sensors and input devices are made the RTU-MP, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU-MP must be routed as shown in Fig. 28. This routing provides the UL required clearance between high- and low-voltage wiring. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board.

Space Temperature (SPT) Sensors —

Afield-supplied Bryant space temperature sensor is required with the RTU-MP to monitor space temperature. There are 3 sensors available for this application:

S 33ZCT55SPT, space temperature sensor with override button

S 33ZCT56SPT, space temperature sensor with override button and setpoint adjustment

S 33ZCT59SPT, space temperature sensor with LCD (liquid crystal display) screen, override button, and setpoint adjustment

Use 20 gauge wire to connect the sensor to the controller. The wire is suitable for distances of up to 500 ft. Use a three-conductor shielded cable for the sensor and setpoint adjustment connections. If the setpoint adjustment (slidebar) is not required, then an unshielded, 18 or 20 gauge, two-conductor, twisted pair cable may be used.

Connect T-55:See Fig. 37 for typical T-55 internal connections. Connect the T-55 SEN terminals to RTU-MP J20-1 and J20-2. See Fig. 38.

1

2

3

4

5

6

RED(+)

 

 

 

 

 

 

WHT(GND)

CCN COM

 

 

 

 

 

 

BLK(-)

 

 

 

 

 

 

 

 

 

 

SEN

 

 

 

 

 

SW1

 

 

 

 

 

 

 

 

 

 

 

BRN (GND)

SENSOR WIRING

 

 

 

 

 

BLU (SPT)

 

C08201

Fig. 37 - T-55 Space Temperature Sensor Wiring

SEN J20-1

SEN J20-2

C08460

Fig. 38 - RTU-MP T-55 Sensor Connections

Connect T-56:See Fig. 39 for T-56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T-56 terminals to RTU-MP J20-1, J20-2 and J20-3 per Fig. 40.

1

2

3

4

5

6

RED(+)

 

 

 

 

 

 

WHT(GND)

CCN COM

 

 

 

 

 

 

BLK(-)

 

 

 

 

 

 

 

 

 

 

SEN

 

SET

 

 

 

SW1

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(T56)

 

 

 

 

 

 

BRN (GND)

SENSOR WIRING

 

 

 

 

 

BLU (SPT)

 

 

 

 

 

 

 

 

JUMPER

 

 

 

 

 

 

 

TERMINALS

 

 

 

 

 

 

 

AS SHOWN

Cool Warm

C08202

Fig. 39 - T-56 Internal Connections

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing Size 14 Unit Service Clearance Dimensional Drawing Plan for Unit LocationInspect Unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Field Fabricate Ductwork For Units with Accessory Electric HeatersRig and Place Unit Economizer Hood Removal and Setup Factory Option Convert to Horizontal and Connect Ductwork when requiredInstall Outside Air Hood Positioning on CurbDamper Assembly Install External Condensate Trap and Line Economizer Hood and Two-Position HoodField Power Supply Make Electrical ConnectionsMounting Position for Field Disconnects Over 100A Units Without Factory-Installed Disconnect Units with Factory-Installed DisconnectUnit Powered Convenience Outlet Wiring Thermostat Field Control WiringFactory-Option Thru-Base Connections Units without Thru-Base ConnectionsHeat Anticipator Settings Unit without Thru-Base Connection KitHeater 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 Supply Air Temperature SAT Sensor RTU-MP Controller Inputs and OutputsField Connections Outdoor Air Temperature OAT SensorSpace Temperature SPT Sensors EconoMi$er2RTU-MP T-56 Sensor Connections Indoor Air Quality CO2 sensorOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Connecting Discrete InputsWeatherproof enclosure RTU-MP Troubleshooting Communication Wiring ProtocolsLocal Access GeneralLEDs LEDs on the RTU-MP show the status of certain functionsController Smoke DetectorsSystem SensorSupply Air Smoke Detector LocationsReturn Air with Economizer Completing Installation of Return Air Smoke Sensor Return Air Detector Shipping PositionUnit Wire/Fuse or Hacr Breaker Sizing Data NonePwrd C.O Adjust Factory-Installed Options EconoMi$er IV Occupancy SwitchInstall Accessories Pre-Start and Start-Up548J*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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