LEGEND
Field Wiring
Power Panel Component Terminal
Fig. 21 Ð Oil Heater and Control Power Wiring
Fig. 22 Ð Carrier Comfort Network
Communication Bus Wiring
CARRIER COMFORT NETWORK INTERFACE Ð The Carrier Comfort Network (CCN) communication bus wiring is supplied and installed by the electrical contractor (if re- quired by jobsite prints). It consists of shielded,
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 element on either side of it. The negative pins must be wired to the negative pins. The signal ground pins must be wired to the signal ground pins. See Fig. 23 for location of the CCN network connector (COMM1) on the processor module.
NOTE: Conductors and drain wire must be 20 AWG (American Wire Gage) minimum stranded, tinned copper. In- dividual conductors must be insulated with PVC, PVC/ nylon, vinyl, Te¯on, or polyethylene. An aluminum/ poly- ester 100% foil shield and an outer jacket of PVC, PVC/ nylon, chrome vinyl, or Te¯on with a minimum operating
temperature range of −4 F to 140 F (−20 C to 60 C) is required. See table below for cables that meet the requirements.
MANUFACTURER | CABLE NO. |
Alpha | 2413 or 5463 |
American | A22503 |
Belden | 8772 |
Columbia | 02525 |
|
|
When connecting the CCN communication bus to a sys- tem element, a color code system for the entire network is recommended to simplify installation and checkout. The fol- lowing color code is recommended:
SIGNAL TYPE | CCN BUS CONDUCTOR | COMM1 PLUG | |
INSULATION COLOR | PIN NO. | ||
| |||
+ | Red | 1 | |
Ground | White | 2 | |
− | Black | 3 |
If a cable with a different color scheme is selected, a similar color code should be adopted for the entire network.
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 ground at only one single point. See Fig. 23. If the communication bus cable exits from one build- ing and enters another, the shields must be connected to ground at the lightning suppressor in each building where the cable enters or exits the building (one point only).
To connect the 17/19EX chiller to the network, proceed as follows (Fig. 23):
1.Cut power to the PIC (Product Integrated Control) panel.
2.Remove the COMM1 plug from the processor module.
3.Cut a CCN wire and strip the ends of the RED, WHITE, and BLACK conductors.
4.Using a wirenut, connect the drain wires together.
5.Insert and secure the RED wire to Terminal 1 of the COMM1 plug.
6.Insert and secure the WHITE wire to Terminal 2 of the COMM1 plug.
7.Insert and secure the BLACK wire to Terminal 3 of the COMM1 plug.
8.Attach the COMM1 plug back onto the processor module.
9.Mount a terminal strip in a convenient location.
10.Connect the opposite ends of each conductor to separate terminals on the terminal strip.
11.Attach the CCN Network wiring:
a.Connect the RED wire to the matching location on the terminal strip.
b.Connect the WHITE wire to the matching location on the terminal strip.
c.Connect the BLACK wire to the matching location on the terminal strip.
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