Carrier 33ZCFANTRM Installation, Start-up And Service Instructions Manual

Also see for 33ZCFANTRM: Mounting instructions

Carrier 33ZCFANTRM Installation, Start-up And Service Instructions Manual Manual pdf 26 page image

267. Strip 1/ 4-in. of insulation from each conductorand equip each with a 1/4 -in. female quick connectterminal.8. Connect the RED wire to terminal +24v on the controlboard.9. Connect the BLACK wire to terminal GND on thecontrol board.10. Connect the WHITE/CLEAR wire to terminalRH/IAQ on the control board.11. Connect shield to ground (if shielded wire is used).Remote Occupancy Contact — The remote occu-pancy input (J4 pin 2) has the capability to be connected to anormally open or normally closed occupancy dry contact. Wirethe dry contact as show in Fig. 23 between J4 Pin 2 and24 VAC J1 Pin 1. The 24 VAC necessary to supply theComfortID™ Controller remote occupancy contact input shallbe supplied using the existing ComfortID Controller.Connect the Outputs — Wire the zone controller’soutputs (fan, staged heat, valves) as shown in the applicablewiring diagrams in Fig. 8A-J.Modulating Baseboard Hydronic Heating — In-stall the water valve on the leaving water end of the baseboadheater. See Fig. 24. Observe the fluid flow direction whenmounting the valve. Be sure to properly heat sink the valve anddirect the flame away from the actuator and valve body whensweating the valve connections. Install the leaving water tem-perature sensor (33ZCSENCHG) on the hydronic heating coilas shown. The sensor accommodates nominal copper pipefrom 1/2 to 1-in. (OD sizes from 5/8 to 1.125 in.). It should besecured to the pipe with the clamp supplied. If piping is largerthan 1-in. nominal size, a field-supplied clamp must be used.Use fiberglass pipe insulation to insulate the sensor assembly.Refer to Fig. 8C and 8H to wire the modulating water valveand the sensor to the zone controller. Connect the leaving watertemperature sensor to the controller using the wiring connec-tions shown for the SAT sensor. (NOTE: The leaving watertemperature sensor replaces the SAT sensor in this application.)Use 18 or 20 AWG wire for all connections. The water valveactuator housing may be used as a junction box if the leavingwater temperature sensor cable is not long enough and the sen-sor cable must be extended to reach the controller.For modulating hydronic heating applications, the defaultconfiguration must be changed to properly control the valve.Refer to the service configuration table and set the HeatingLoop parameters as follows:Proportional Gain = 20.0Integral Gain = 0.5Derivative Gain = 0.0Start Value = 102.0Also, set the Ducted Heat decision to YES and set the Max-imum Duct Temperature decision equal to the design (maxi-mum) boiler water temperature minus 20 degrees, but notgreater than 200 degrees F.Connect the CCN Communication Bus — Thezone controllers connect to the bus in a daisy chain arrange-ment. The zone controller may be installed on a primary CCNbus or on a secondary bus from the primary CCN bus. Con-necting to a secondary bus is recommended.At 9,600 baud, the number of controllers is limited to 128zones maximum, with a limit of 8 systems (Linkage Coordina-tor configured for at least 2 zones). Bus length may not exceed4000-ft, with no more than 60 devices on any 1000-ft section.Optically isolated RS-485 repeaters are required every 1000 ft.At 19,200 and 38,400 baud, the number of controllersis limited to 128 maximum, with no limit on the number ofLinkage Coordinators. Bus length may not exceed 1000 ft.The first zone controller in a network connects directly tothe bridge and the others are wired sequentially in a daisy chainfashion. Refer to Fig. 25 for an illustration of CCN Communi-cation Bus wiring.The CCN Communication Bus also connects to the zonecontroller space temperature sensor. Refer to the Install theSensors section for sensor wiring instructions.COMMUNICATION BUS WIRE SPECIFICATIONS —The Carrier Comfort Network (CCN) Communication Buswiring is field-supplied and field-installed. It consists ofshielded three-conductor cable with drain (ground) wire. Thecable selected must be identical to the CCN CommunicationBus wire used for the entire network. See Table 2 for recom-mended cable.Table 2 — Recommended CablesNOTE: Conductors and drain wire must be at least 20 AWG(American Wire Gage), stranded, and tinned copper. Individual con-ductors must be insulated with PVC, PVC/nylon, vinyl, teflon, orpolyethylene. An aluminum/polyester 100% foil shield and an outerjacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimumoperating temperature range of –20° C to 60° C is required.CONNECTION TO THE COMMUNICATION BUS1. Strip the ends of the red, white, and black conductorsof the communication bus cable.2. Connect one end of the communication bus cable tothe bridge communication port labeled COMM2 (ifconnecting on a secondary bus).When connecting the communication bus cable, acolor code system for the entire network is recom-mended to simplify installation and checkout. SeeTable 3 for the recommended color code.Table 3 — Color Code RecommendationsMANUFACTURER CABLE PART NO.Alpha 2413 or 5463American A22503Belden 8772Columbia 02525SIGNAL TYPE CCN BUS WIRECOLORPLUG PINNUMBER+ Red 1Ground White 2– Black 3Fig. 21 — Wall Mounted Relative Humidity Sensor(P/N 33AMSENRHS000)801→