Carrier 50HCQ12 Installation Instructions Manual

Also see for 50HCQ12: Installation instructions

26place the unit into Occupied mode. This function may alsoprovide a “Door Switch” time delay function that willterminate cooling and heating functions after a 2--20 minutedelay.Connect one side of the NO contact set on the timeclockto CTB’s THERMOSTAT--R terminal. Connect the otherside of the timeclock contact to the unit’s TB3--2 terminal.R2TB3 PLTime ClockRemote Occupied LCTBThermostatJ4-12C10288Fig. 47 -- PremierLink Wiring Remote OccupiedRefer to Form 33CS--58SI for additional information onconfiguring the PremierLink control for Door Switchtimer function.Space Relative Humidity Sensor —The RH sensor is not used with 50HCQ models at thistime.Power Exhaust (output) —Connect the accessory Power Exhaust contactor coils(s)per Fig. 48.J8-315CTB3 PLPECTANPower ExhaustCTBTHERMOSTATGRAC10289Fig. 48 -- PremierLink Power Exhaust OutputConnectionCCN Communication Bus —The PremierLink controller connects to the bus in a daisychain arrangement. Negative pins on each componentmust be connected to respective negative pins, andlikewise, positive pins on each component must beconnected to respective positive pins. The controllersignal pins must be wired to the signal ground pins.Wiring connections for CCN must be made at the 3--pinplug.At any baud (9600, 19200, 38400 baud), the number ofcontrollers is limited to 239 devices maximum. Bus lengthmay not exceed 4000 ft, with no more than 60 totaldevices on any 1000--ft section. Optically isolated RS--485repeaters are required every 1000 ft.NOTE: Carrier device default is 9600 band.Communications Bus Wire Specifications -- The CCNCommunication Bus wiring is field--supplied andfield--installed. It consists of shielded 3--conductor cablewith drain (ground) wire. The cable selected must beidentical to the CCN Communication Bus wire used forthe entire network.See Table 5 for recommended cable.Table 5 – Recommended CablesMANUFACTURER CABLE PART NO.Alpha 2413 or 5463American A22503Belden 8772Columbia 02525NOTE: Conductors and drain wire must be at least 20AWG, stranded, and tinned copper. Individual conductorsmust be insulated with PVC, PVC/nylon, vinyl, Teflon, orpolyethylene. An aluminum/polyester 100% foil shieldand an outer jacket of PVC, PVC/nylon, chrome vinyl, orTeflon with a minimum operating temperature range of--20_C to 60_C is required. Do not run communicationwire in the same conduit as or next to any AC voltagewiring.The communication bus shields must be tied together ateach system element. If the communication bus is entirelywithin one building, the resulting continuous shield mustbe connected to ground at only one single point. If thecommunication bus cable exits from one building andenters another building, the shields must be connected tothe grounds at a lightning suppressor in each building (onepoint only).Connecting CCN Bus:NOTE: When connecting the communication bus cable,a color code system for the entire network isrecommended to simplify installation and checkout. SeeTable 6 for the recommended color code.Table 6 – Color Code RecommendationsSIGNAL TYPE CCN BUS WIRECOLORCCN PLUG PINNUMBER+ Red 1Ground White 2--- Black 3Connect the CCN (+) lead (typically RED) to the unit’sTB3--12 terminal. Connect the CCN (ground) lead(typically WHT) to the unit’s TB3--14 terminal. Connectthe CCN (--) lead (typically BLK) to the unit’s TB3--16terminal. See Fig. 49.CCN BusJ2-1J2-2GND (WHT)1214TB3J2-3– (BLK) 16TB3TB3 PL+ (RED)C10290Fig. 49 -- PremierLink CCN Bus Connections50HCQD12