Table of Contents
Advertisement
CARRIER COMFORT NETWORK
BUS WIRING
The communication bus wiring is a shielded, 3-conductor cable
with drain wire and is field supplied and installed in the field.
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. This is also required for the
negative and signal ground pins of each system element. Wiring
connections for CCN should be made at TB 3 (terminal block).
Consult the CCN Contractor's Manual for further information.
(See Fig. 28.)
NOTE: Conductors and drain wire must be 20 AWG minimum
stranded, tinned copper. Individual conductors must be insulated
with PVC, PVC/nylon, vinyl, Teflon
aluminum/polyester 100% foil shield and an outer jacket of PVC,
PVC/nylon, chrome vinyl, or Teflon with a minimum operating
temperature range of –4°F (–20°C) to 140°F (60°C) is required.
Refer to Table 27 for a list of manufacturers that produce CCN bus
wiring that meets these requirements.
Table 27 — CCN Communication Bus Wiring
MANUFACTURER
Regular Wiring
Alpha
American
Belden
Columbia
Manhatten
Quabik
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 containing different
colored wires. At each system element, the shields of its
communication bus cables must be tied together. If the communi-
cation bus is entirely within one building, the resulting continuous
shield must be connected to a ground at one point only. If the
1. Third-party trademarks and logos are the property of their respective
owners.
SPECIFICATION
Cable
Conductor
Insulation
Color Code
Twist Lay
Shielding
Jacket
DC Resistance
Capacitance
Characteristic Impedance
Weight
UL Temperature Rating
Voltage
Listing
See legend below Table 29.
(CCN) COMMUNICATION
®
®1
, or polyethylene. An
PART NUMBER
Plenum Wiring
1895
—
A21451
A48301
8205
884421
D6451
—
M13402
M64430
6130
—
Table 28 — MS/TP Wiring Recommendations
Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable
22 or 24 AWG stranded copper (tin plated)
Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) OD
Black/White
2 in. (50.8 mm) lay on pair 6 twists/foot (20 twists/meter) nominal
Aluminum/Mylar shield with 24 AWG TC drain wire
SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) OD
Halar Jacket (E-CTFE) 0.010 in. (0.254 mm) wall 0.144 in. (3.6576 mm) OD
15.2 Ohms/1000 ft (50 Ohms/km) nominal
12.5 pF/ft (41 pF/meter) nominal conductor to conductor
100 Ohms nominal
12 lb/1000 ft (17.9 kg/km)
SmokeGard 167°F (75°C), Halar –40 to 302°F (–40 to 150°C)
300 vac, power limited
UL: NEC CL2P or better
communication 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 appropriate
colors for different colored cables.
3.
Connect the red wire to the (+) terminal on TB3 of the plug,
the white wire to the 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, disconnect the machine from the
CCN network. 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.
BACNET IP, MSTP OR ETHERNET COMMUNICATION
The 30RC units come standard with BACnet IP and Ethernet
communications. The cabling for this is standard CAT 5
(minimum) with RJ45 connector.
NON-CCN COMMUNICATION WIRING
The 30RC units offer several non-CCN translators. Refer to the
separate installation instructions for additional wiring steps.
MS/TP WIRING RECOMMENDATIONS
Recommendations are shown in Tables 28 and 29. The wire jacket
and UL (Underwriters Laboratories) temperature rating specifica-
tions list 2 acceptable alternatives. The Halar
higher temperature rating and a tougher outer jacket than the
SmokeGard
™1
specification, and it is appropriate for use in appli-
cations where the user is concerned about abrasion. The Halar
jacket is also less likely to crack in extremely low temperatures.
NOTE: Use the specified type of wire and cable for maximum
signal integrity.
RECOMMMENDATION
50
®1
specification has a
Advertisement
Table of Contents
