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Connect the leaving water temperature sensor to the controller using the wiring connections shown for the SAT sensor. (NOTE: The leaving water temperature sensor replaces the SAT sensor in this application.) Use 18 or 20 AWG wire for all connections. The water valve actuator housing may be used as a junction box if the leaving water temperature sensor cable is not long enough and the sensor cable must be extended to reach the controller. For modulating hydronic heating applications, the default configuration must be changed to properly control the valve. Refer to the service configuration table and set the Heating Loop parameters as follows: Proportional Gain = 20.0 Integral Gain = 0.5 Derivative Gain = 0.0 Start Value = 102.0 Also, set the Ducted Heat decision to YES and set the Maximum Duct Temperature decision equal to the design (maximum) boiler water temperature minus 20 degrees, but not greater than 200 degrees F. Connect the CCN Communication Bus — The zone controllers connect to the bus in a daisy chain arrangement. The zone controller may be installed on a primary CCN bus or on a secondary bus from the primary CCN bus. Connecting to a secondary bus is recommended. At 9,600 baud, the number of controllers is limited to 128 zones maximum, with a limit of 8 systems (Linkage Coordinator configured for at least 2 zones). Bus length may not exceed 4000-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 controllers is limited to 128 maximum, with no limit on the number of Linkage Coordinators. Bus length may not exceed 1000 ft. The first zone controller in a network connects directly to the bridge and the others are wired sequentially in a daisy chain fashion. Refer to Fig. 25 for an illustration of CCN Communication Bus wiring. The CCN Communication Bus also connects to the zone controller space temperature sensor. Refer to the Install the Sensors section for sensor wiring instructions. COMMUNICATION BUS WIRE SPECIFICATIONS — The Carrier Comfort Network (CCN) Communication Bus wiring is field-supplied and field-installed. It consists of shielded three-conductor cable with drain (ground) wire. The cable selected must be identical to the CCN Communication Bus wire used for the entire network. See Table 2 for recommended cable. Table 2 — Recommended Cables MANUFACTURER CABLE PART NO. Alpha 2413 or 5463 American A22503 Belden 8772 Columbia 02525 NOTE: Conductors and drain wire must be at least 20 AWG (American Wire Gage), stranded, and tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –20° C to 60° C is required. CONNECTION TO THE COMMUNICATION BUS 1. Strip the ends of the red, white, and black conductors of the communication bus cable. 2. Connect one end of the communication bus cable to the bridge communication port labeled COMM2 (if connecting on a secondary bus). When connecting the communication bus cable, a color code system for the entire network is recommended to simplify installation and checkout. See Table 3 for the recommended color code. Table 3 — Color Code Recommendations SIGNAL TYPE CCN BUS WIRE COLOR PLUG PIN NUMBER + Red 1 Ground White 2 – Black 3 801 26 27 3. Connect the other end of the communication bus cable to the terminal block labeled CCN in the zone controller of the first air terminal. Following the color code in Table 3, connect the Red (+) wire to Terminal 1. Connect the White (ground) wire to Terminal 2. Connect the Black (–) wire to Terminal 3. 4. Connect additional zone controllers in a daisy chain fashion, following the color coded wiring scheme in Table 3. Refer to Fig. 25. NOTE: The communication bus drain wires (shield) must be tied together at each zone controller. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one single point. If the communication bus cable exits from one building and enters another building, connect the shields to ground at a lightning suppressor in each building where the cable enters or exits (one point only). + - 499 RESISTOR (SUPPLIED W/SENSOR) HUMIDITY SENSOR RED WHITE BLACK 3 CONDUCTOR 20 AWG CABLE SHIELD (IF USED) 35 in-lb (4 Nm) 80...110s HF23BJ042 Made in Switzerland by Belimo Automation 0 1 yel blu ora WIP 5K LISTED 94D5 TEMP. IND. & REG. EQUIP. UL Class 2 Supply LR 92800 NEMA 2 24VAC/DC 50/60Hz 3VA 2W COM 1 2 3 blk red wht +24V RH/IAQ GND Fig. 22 — Humidity Sensor Wiring Low 303 28 AutomationBy BelimoSwitzerlandMade in 2W3VA 50/60Hz24VAC/DC HF23BJ042 80...110s 35 in-lb(4Nm) WhtRedBlkcom OraBluYel 10 Hi W B R HEAT1 24VAC HEAT2 FIELD-SUPPLIEDDRY CONTACT SWITCHTRANSFORMERGROUNDcomunicationsCCNNot usedcomunicationsCCN TRAN BWR 24 VACN/A PATT56SAT SPT+24V SEC...

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