Carrier 50TCQA Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

Contents

28Table 8 – RTU--MP Controller Inputs and OutputsPOINT NAME BACnet OBJECTNAME TYPE OF I/O CONNECTION PINNUMBERSINPUTSSpace Temperature Sensor sptsens AI (10K Thermistor) J20---1, 2Supply Air Temperature sat AI (10K Thermistor) J2---1, 2Local Outside Air Temperature Sensor oatsens AI (10K Thermistor) J2---3, 4Space Temperature Offset Pot sptopot AI (100K Potentiometer) J20---3Indoor Air Quality iaq AI (4---20 ma) J4---2, 3Outdoor Air Quality oaq AI (4---20 ma) J4---5, 6Safety Chain Feedback safety DI (24 VAC) J1---9Compressor Safety compstat DI (24 VAC) J1---2Fire Shutdown firedown DI (24 VAC) J1---10Enthalpy Switch enthalpy DI (24 VAC) J2---6, 7Humidistat Input Status humstat DI (24 VAC) J5---7, 8CONFIGURABLE INPUTS*Space Relative Humidity sprh AI (4---20 ma) J4---2,3 or J4---5,6Outside Air Relative Humidity oarh AI (4---20 ma)Supply Fan Status fanstat DI (24 VAC) J5---1,2 or J5---3,4 orJ5 5,6 or J5---7,8Filter Status filtstat DI (24 VAC)Remote Occupancy Input remocc DI (24 VAC)OUTPUTSEconomizer Commanded Position econocmd 4---20ma J2---5Supply Fan Relay State sf DO Relay (24VAC , 1A) J1---4Compressor 1 Relay State comp_1 DO Relay (24VAC , 1A) J1---8Compressor 2 Relay State comp_2 DO Relay (24VAC , 1A) J1---7Heat Stage 1 Relay State heat_1 DO Relay (24VAC , 1A) J1---6Heat Stage 2 Relay State heat_2 DO Relay (24VAC , 1A) J1---5Power Exhaust Relay State aux_2 DO Relay (24VAC , 1A) J11---3Dehumidification Relay State humizer DO Relay (24VAC, 1A) J11---7, 8LEGENDAI --- Analog InputAO --- Analog OutputDI --- Discrete InputDO --- Discrete Output* These inputs (if installed) take the place of the default input on the specific channel according to schematic.Parallel pins J5--- 1 = J2--- 6, J5--- 3 = J1--- 10, J5--- 5 = J1--- 2 are used for field --- installation.The RTU--MP controller requires the use of a Carrierspace sensor. A standard thermostat cannot be used withthe RTU--MP system.Supply Air Temperature (SAT) Sensor -- OnFIOP--equipped 50TCQ unit, the unit is supplied with asupply--air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6--inches (12.7mm) in length. It is a nominal 10--k ohm thermistor.The SAT is factory--wired. The SAT probe is wire--tied tothe supply--air opening (on the horizontal opening end) inits shipping position. Remove the sensor for installation.Re--position the sensor in the flange of the supply--airopening or in the supply air duct (as required by localcodes). Drill or punch a 1 / 2 --in. hole in the flange or duct.Use two field--supplied, self--drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 29.Outdoor Air Temperature (OAT) Sensor -- The OAT isfactory--mounted in the EconoMi$er2 (FIOP oraccessory). It is a nominal 10k ohm thermistor attached toan eyelet mounting ring.EconoMi$er2 -- The RTU--MP control is used withEconoMi$er2 (option or accessory) for outdoor airmanagement. The damper position is controlled directlyby the RTU--MP control; EconoMi$er2 has no internallogic device.Outdoor air management functions can be enhanced withfield--installation of these accessory control devices:Enthalpy control (outdoor air or differential sensors)Space CO2 sensorOutdoor air CO2 sensorField Connections -- Field connections for accessorysensors and input devices are made the RTU--MP, at plugsJ1, J2, J4, J5, J11 and J20. All field control wiring thatconnects to the RTU--MP must be routed through theraceway built into the corner post as shown in Fig. 22.50TCQA