Carrier 50TCQD14 Installation Instructions Manual

Also see for 50TCQD: Installation instructions

Contents

50RTU Open Controller SystemThe RTU Open controller is factory--mounted in the50TCQ unit’s main control box, to the left of the CTB.See Fig. 66. Factory wiring is completed throughharnesses connected to the CTB. Field connections forRTU Open controller sensors will be made at the PCBconnectors on the RTU Open board. The factory--installedRTU Open controller includes the supply--air temperature(SAT) sensor. The outdoor air temperature (OAT) sensor isincluded in the FIOP/accessory EconoMi$erR2 package.The RTU Open controller is an integrated component ofthe Carrier rooftop unit. Its internal applicationprogramming provides optimum performance and energyefficiency. RTU Open controller enables the unit to run in100% stand--alone control mode, Carrier’s i--VuR Opennetwork, or a Third Party Building Automation System(BAS). On--board DIP switches allow you to select yourprotocol (and baud rate) of choice among the four mostpopular protocols in use today: BACnet*, Modbus{,Johnson N2 and LonWorks**. (See Fig. 65.)Refer to Table 27, RTU Open Controller Inputs andOutputs for locations of all connections to the RTU Opencontroller board.NOTE: The RTU Open controller acts as an intelligentimbedded thermostat. A room thermostat cannot be usedwith the RTU Open controller.J4J2J1J5 J5J22J17J19 J14J11J22J3J13J12J15J20Network CommConfigurable - Input_824 VACConfigurable - Input_524 VACConfigurable - Input_324 VACInput_9 (Humidistat)24 VAC24 VACInput _8 (Enthalpy)AO-1 (ECON)Gnd(OAT)Gnd(SAT)Input_5 (SMK)Input_4 (R)BO-5 (Y1)BO-4 (Y2)BO-3 (W1)BO-2 (W2)BO-1 (G)GndInput_3 (X)24 VAC IN+24 VDCInput_2 (CO2/RH)Gnd+24 VDCInput_1 (CO2/RH)GndBoard Power(AO-1)0-10VDC4-20mABO-6(H) HumidimizerBO-7(Reversing Valve/High Speed Fan/Y3)BO-8(Power Exhaust)LonWorksOption CardPortExample set forBACnet MS/TPand 76.8K baud(1, 2, and 4 ON)Recommended for alli-Vu Open installationsProtocol Selector SPT (temp input) BACnet, Modbus, or N2(LON connection J15)SPT (common)SPT (offset input)*Removeboth for 0-5VAO-2GND(2-10V)3-VoltLithiumBatteryBO-1 BO-2 BO-3 BO-4 BO-5BO-6BO-7BO-8VFD OutputC14129Fig. 65 -- RTU Open Multi--Protocol Control Board* BACnet is a registered trademark of ASHRAE (American Society ofHeating, Refrigerating and Air---Conditioning Engineers).{ Modbus is a registered trademark of Schneider Electric.** LonWorks is a registered trademark of Echelon Corporation.