Bryant Comprehensive Guide to the RTU-MP Control System

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RTU-MP Control System

The RTU-MP controller, see Fig. 33, provides expanded stand-alone operation of the HVAC system plus connection and control through communication with several Building Automation Systems (BAS) through popular third-party network systems. The available network systems are BACnet MP/TP, Modbus and Johnson J2. Communication with LonWorks is also possible by adding an accessory interface card to the RTU-MP. Selection of the communication protocol and baud rate are made at on-board DIP switches.

The RTU-MP control is factory-mounted in the 548J*14D unit’s main control box, to the left of the CTB. See Fig. 34. Factory wiring is completed through harnesses connected to the CTB. Field connections for RTU-MP sensors will be made at the Phoenix connectors on the RTU-MP board. The factory-installed RTU-MP control includes the supply-air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$ert2 package.

Refer to Table 2, RTU-MP Controller Inputs and Outputs for locations of all connections to the RTU-MP board.

548J*14D

C07129

Fig. 33 - RTU-MP Multi-Protocol Control Board

C10024

Fig. 34 - 548J*14D Control Box Component Locations

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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 Positioning on Curb Convert to Horizontal and Connect Ductwork when requiredInstall Outside Air Hood Economizer Hood Removal and Setup Factory OptionDamper 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 Units without Thru-Base Connections Field Control WiringFactory-Option Thru-Base Connections ThermostatUnit 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 SensorEconoMi$er2 Outdoor Air Temperature OAT SensorSpace Temperature SPT Sensors Field ConnectionsIndoor Air Quality CO2 sensor RTU-MP T-56 Sensor ConnectionsOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Connecting Discrete InputsWeatherproof enclosure General Communication Wiring ProtocolsLocal Access RTU-MP TroubleshootingLEDs on the RTU-MP show the status of certain functions LEDsSensor Smoke DetectorsSystem ControllerSupply Air Smoke Detector LocationsReturn Air with Economizer Return Air Detector Shipping Position Completing Installation of Return Air Smoke SensorNone Unit Wire/Fuse or Hacr Breaker Sizing DataPwrd C.O EconoMi$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.