Carrier WEATHER MASTER P4 Installation Instructions Manual

Contents

73Carrier Comfort Network® (CCN) Interface —The 48P Series units can be connected to the CCN system ifdesired. The communication bus wiring is supplied andinstalled in the field. It consists of shielded, 3-conductor cablewith shield wire.The system elements are connected to the communicationbus in a daisy chain arrangement. The positive pin of eachsystem element communication connector must be wired to thepositive pins of the system element on either side of it, thenegative pins must be wired to the negative pins, and the signalpins must be wired to common pins. Wiring connections forthe CCN system should be made at the terminal block using thescrew terminals. The board also contains an RJ14 CCN plugthat can be used to connect a field service computer. There isalso another RJ14 LEN (Local Equipment Network) connec-tion that is used to download software or connect a Naviga-tor™ device.NOTE: Conductors and drain wire must be 20 AWG minimumstranded, tinned copper. Individual conductors must be insu-lated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. Analuminum/polyester 100% foil shield and an outer jacket ofPVC, PVC/nylon, chrome vinyl, or Teflon with a minimumoperating temperature range of –4 to 140 F (–20 C to 60 C) isrequired. See Table 28 for cables that meet the requirements.Table 28 — CCN Connection ApprovedShielded CablesThe following color code is recommended:NOTE: If a cable with a different color scheme is selected, asimilar color code should be adopted for the entire network.At each system element, the shields of its communicationbus cables must be tied together. If the communication bus isentirely within one building, the resulting continuous fieldmust be connected to a ground at one point only. If the commu-nication bus cable exits from one building and enters another,the shields must be connected to grounds at the lightningsuppressor in each building where the cable enters or exits thebuilding (one point per building only).To connect the unit to the network (Fig. 84):1. Turn off power to the control box.2. Cut the CCN wire and strip the ends of the red (+), white(common) and black (–) conductors. (If a different net-work color scheme is used, substitute appropriate colors.)3. Wire the CCN to the screw terminals on the COMMboard as follows (Fig. 84):a. Secure the red (+) wire to CCN screw terminal +on the COMM board.b. Secure the white (common) wire to CCN screwterminal C on the COMM board.TB201MBBJ5Fig. 84 — CCN Connectionsa48-8487MANUFACTURER CABLE PART NO.Alpha 2413 or 5463American A22503Belden 8772Columbia 02525IMPORTANT: When connecting the CCN communica-tion bus to a system element, use a color coding system forthe entire network to simplify installation and checkout.SIGNALTYPECCN BUS CONDUCTORINSULATION COLORCOMM1 PLUGPIN NO.+ RED 1COMMON WHITE 2– BLACK 3

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