Carrier 30XW150-400 specifications Carrier Comfort Network CCN Interface, Configuration, a30-4706

Carrier Comfort Network® (CCN) Interface —

All 30XW units can be connected to a CCN system, if desired. The communication bus wiring is a shielded, 3-conductor cable with drain wire and is field supplied and installed. The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system elements on either side of it. The negative and sig- nal ground pins of each system element must also be wired in the same manner. Wiring connections for CCN should be made at TB3. Consult the CCN Contractor’s Manual for further in- formation. See Fig. 14.

NOTE: Conductors and drain wire must be 20 AWG (Ameri- can Wire Gage) minimum stranded, 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. See Table 11 for recommended wire manufacturers and part numbers.

Table 11 — CCN Communication Bus Wiring

MANUFACTURER	PART NUMBER
	Regular Wiring	Plenum Wiring
Alpha	1895	—
American	A21451	A48301
Belden	8205	884421
Columbia	D6451	—
Manhattan	M13402	M64430
Quabik	6130	—

It is important when connecting to a CCN communication bus that a color-coding scheme be used for the entire network to simplify the installation. It is recommended that red be used for the signal positive, black for the signal negative, and white for the signal ground. Use a similar scheme for cables contain- ing different colored wires.

At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous shield must 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 lightning suppressor in each building where the cable enters or exits the building (one point per building only). To connect the unit to the network:

1.Turn off power to the control box.

2.Cut the CCN wire and strip the ends of the red (+), white (ground), and black (–) conductors. (Substitute appropri- ate colors for different colored cables.)

3.Connect the red wire to (+) terminal on TB3 of the plug, the white wire to COM terminal, and the black wire to the

(–) terminal.

4.The RJ14 CCN connector on TB3 can also be used, but is only intended for temporary connection (for example, a laptop computer running Service Tool).

IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting. If abnormal conditions occur, discon- nect the CCN bus. If conditions return to normal, check the CCN connector and cable. Run new cable if necessary. A short in one section of the bus can cause problems with all system elements on the bus.

Remote Alarm and Alert Relays — The 30XW chiller can be equipped with a remote alert and remote alarm annunciator contacts. Both relays connected to these contacts must be rated for a maximum power draw of 10 va sealed, 25 va inrush at 24 volts. The alarm relay, indicating that the complete unit has been shut down, can be connected to TB5-12 and TB5-13. Refer to unit wiring diagrams. For an alert relay, indicating that at least 1 circuit is off due to the alert, a field- supplied and installed relay must be connected between MBB- J3-CH25-3 and TB5-13. The action of the alarm and alert re- lays can be reversed from normally open to normally closed by using the Reverse Alarms Relay configuration (Reverse Alarms Relay, RV.AL).

CONFIGURATION

Touch Pilot™ Operation Configuration Tables — The Touch Pilot display operation is controlled by configuration information entered in the following configura- tion tables. These tables are accessible by using Network Ser- vice Tool or ComfortVIEW™ software. The tables are the CtrlID (Controller Identification) configuration table and the USERCONF (User Configuration) table. See Tables 12 and 13.

NOTE: Always perform an Upload to obtain the latest config- uration before making configuration table changes.

(+) (COM) (-) SHIELD (+) (COM) (-) SHIELD

LEN CCN CCN LEN CCN CCN LEN CCN

RED WHT BLK SHIELD RED WHT BLK

(+)(COM) (-) SHIELD CCN

RED WHT BLK

TO NEXT

DEVICE

LEGEND

CCN — Carrier Comfort Network®

LEN — Local Equipment Network

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Fig. 14 — ComfortLink™ CCN Communication Wiring

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