Bryant 551J installation instructions RTU-MP control system, RTU-MP Multi-Protocol Control Board

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RTU-MP control system —

The RTU-MP controller, see Fig. 36, 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 551J unit’s main control box, to the left of the CTB. See Fig. 37. 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$er2 package.

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

551J

j

C07129

Fig. 36 - RTU-MP Multi-Protocol Control Board

C10049

Fig. 37 - 551J Control Box Component Locations

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Contents Installation Instructions 551J Unit Dimensional Drawing C10058 Plan for Sequence of Unit Installation Curb-mounted installationOperating Weights Plan for Unit LocationInspect unit Provide Unit SupportRoof Curb Details Field Fabricate Ductwork Rig and Place UnitPositioning on Curb Convert to Horizontal and Connect Ductwork when requiredInstall Outside Air Hood Indoor Coil Access Panel Relocation Make Electrical Connections Install External Condensate Trap and LineField Power Supply All units Convenience OutletsConvenience Outlet Location Installing Weatherproof Cover Field Control Wiring Factory-Option Thru-Base ConnectionsUnits without Thru-Base Connections ThermostatHeater Model Number Heat Anticipator SettingsElectric Heaters Typical Component Location Smoke Detectors SystemController Smoke Detector Locations Typical Supply Air Smoke Detector Sensor LocationCompleting Installation of Return Air Smoke Sensor Return Air Detector Shipping PositionRTU-MP control system RTU-MP Multi-Protocol Control BoardRTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Type of I/O Connection PIN Name Numbers InputsSpace Temperature SPT Sensors 55 Space Temperature Sensor WiringRTU-MP T-56 Sensor Connections SEN Connecting Discrete Inputs Power Exhaust outputCommunication Wiring Protocols General Filter StatusLocal Access RTU-MP Troubleshooting Communication LEDsLEDs LEDs on the RTU-MP show the status of certain functionsUnit Wire/Fuse or Hacr Breaker Sizing Data FLA LRAPwrd C.O 27.8 132 42.0 47/47 Adjust Factory-Installed Options EconoMi$er IV Occupancy SwitchInstall Accessories Pre-Start and Start-Up