Carrier 50HCQ12 Installation Instructions Manual

Also see for 50HCQ12: Installation instructions

21Outdoor Air Temperature (OAT) Sensor —The OAT is factory--mounted in the EconoMi$er2 (FIOPor accessory). It is a nominal 10k ohm thermistor attachedto an eyelet mounting ring.EconoMi$er2 —The PremierLink control is used with EconoMi$er2(option or accessory) for outdoor air management. Thedamper position is controlled directly by the PremierLinkcontrol; EconoMi$er2 has no internal logic 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 2 for accessory part numbers.Field ConnectionsField connections for accessory sensor and input devicesare made at the 16--pole terminal block (TB3) locatedbeneath the PremierLink control (See Fig. 35). Someinput devices also require a 24--vac signal source; connectat CTB terminal R at “THERMOSTAT” connection stripfor this signal source. See connections figures onfollowing pages for field connection locations (and forcontinued connections at the PremierLink board inputs).Route wires to control box as indicated in Fig. 28.Table 3 provides a summary of field connections for unitsequipped with Space Sensor. Table 4 provides a summary offield connections for units equipped with Space Thermostat.Space Sensors —The PremierLink controller is factory--shipped configuredfor Space Sensor Mode. A Carrier T--55 or T--56 spacesensor must be used. T--55 space temperature sensorprovides a signal of space temperature to the PremierLinkcontrol. T--56 provides same space temperature signal plusit allows for adjustment of space temperature setpointsfrom the face of the sensor by the occupants.2 3 4 5 61SW1SENBRN (GND)BLU (SPT)RED(+)WHT(GND)BLK(-) CCN COMSENSOR WIRINGC08201Fig. 36 -- T--55 Space Temperature Sensor WiringConnect T--55: See Fig. 36 for typical T--55 internalconnections. Connect the T--55 SEN terminals to TB3terminals 1 and 3 (see Fig. 37).SEN J6-7J6-613TB3 PLSENC10023Fig. 37 -- PremierLink T--55 SensorConnect T--56: See Fig. 38 for T--56 internal connections.Install a jumper between SEN and SET terminals asillustrated. Connect T--56 terminals to TB3 terminals 1, 3and 5 (see Fig. 39).2 3 4 5 61SW1SEN SETCool WarmBRN (GND)BLU (SPT)RED(+)WHT(GND)BLK(-) CCN COMSENSOR WIRINGJUMPERTERMINALSAS SHOWNBLK(T56)C08202Fig. 38 -- T--56 Internal ConnectionsSEN J6-7J6-613TB3 PLSENSETJumperTB3 PLJ6-55SETC10022Fig. 39 -- PremierLink T--56 SensorConnect Thermostat —A 7--wire thermostat connection requires a 24--v powersource and a common connection. Use the R and Cterminals on the CTB’s THERMOSTAT connection stripfor these. Connect the thermostat’s Y1, Y2, W1, W2 andG terminals to PremierLink TB3 as shown in Fig. 40.If the 50HCQ 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--8.50HCQD12