Carrier 50TCQA Installation Instructions Manual

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

Contents

19Outdoor 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 PremierLink control is used withEconoMi$er2 (option or accessory) for outdoor airmanagement. The damper position is controlled directlyby the PremierLink control; EconoMi$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 sensorRefer to Table 3 for accessory part numbers.Field connections — Field connections for accessorysensor and input devices are made at the 16--pole terminalblock (TB1) located on the control box bottom shelf infront of the PremierLink control (See Fig. 30). Some inputdevices also require a 24--vac signal source; connect atCTB terminal R at “THERMOSTAT” connection strip forthis signal source. See connections figures on followingpages for field connection locations (and for continuedconnections at the PremierLink board inputs).Table 4 provides a summary of field connections for unitsequipped with Space Sensor. Table 5 provides a summaryof field connections for units equipped with SpaceThermostat.Space Sensors -- The PremierLink controller isfactory--shipped configured for Space Sensor Mode. ACarrier T--55 or T--56 space sensor must be used. T--55space temperature sensor provides a signal of spacetemperature to the PremierLink control. T--56 providessame space temperature signal plus it allows foradjustment of space temperature setpoints from the face ofthe sensor by the occupants.2 3 4 5 61SW1SENBRN (GND)BLU (SPT)RED(+)WHT(GND)BLK(-) CCN COMSENSOR WIRINGC08201Fig. 31 -- T--55 Space Temperature Sensor WiringConnect T--55 -- See Fig. 31 for typical T--55 internalconnections. Connect the T--55 SEN terminals to TB1terminals 1 and 3 (see Fig. 32).SEN J6-7J6-613TB1 PLSENC08212Fig. 32 -- PremierLink T--55 SensorConnect T--56 -- See Fig. 33 for T--56 internalconnections. Install a jumper between SEN and SETterminals as illustrated. Connect T--56 terminals to TB1terminals 1, 3 and 5 (see Fig. 34).2 3 4 5 61SW1SEN SETCool WarmBRN (GND)BLU (SPT)RED(+)WHT(GND)BLK(-) CCN COMSENSOR WIRINGJUMPERTERMINALSAS SHOWNBLK(T56)C08202Fig. 33 -- T--56 Internal ConnectionsSEN J6-7J6-613TB1 PLSENSETJumperTB1 PLJ6-55SETC08213Fig. 34 -- PremierLink T--56 SensorConnect Thermostat — A 7--wire thermostat connectionrequires a 24--v power source and a common connection.Use the R and C terminals on the CTB’s THERMOSTATconnection strip for these. Connect the thermostat’s Y1,Y2, W1, W2 and G terminals to PremierLink TB1 asshown in Fig. 35.If the 50TCQ unit is equipped with factory--installedsmoke detector(s), disconnect the factory BLU lead atTB1--6 (Y2) before connecting the thermostat. Identify theBLU lead originating at CTB--DDC--1; disconnect atTB1--6 and tape off. Confirm that the second BLU lead atTB1--6 remains connected to PremierLink J4--8.50TCQA