Optional Upc Open Controller Wiring - Carrier AquaEdge 19XR series Installation Instructions Manual

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. 27. If the communication bus cable exits from one build-
ing and enters another, the shields must be connected to ground
at the lightening suppressor in each building where the cable
enters or exits the building (one point only).
To connect the 19XR chiller to the network, proceed as fol-
lows (see Fig. 27):
1. Route wire through knockout in back of control panel.
2. Strip back leads.
3. Crimp one no. 8 size spring spade terminal on each
conductor.
4. Attach red to "+" terminal and white to "G" terminal and
black to "–" terminal of CCN Network interface located
in the control panel.
OPTIONAL UPC OPEN CONTROLLER WIRING — The
optional UPC Open controller communicates using BACnet*
on an MS/TP network segment communications at 9600 bps,
19.2 kbps, 38.4 kbps, or 76.8 kbps.
Wire the controllers on an MS/TP network segment in a dai-
sy-chain configuration. Wire specifications for the cable are
22 AWG (American Wire Gage) or 24 AWG, low-capacitance,
twisted, stranded, shielded copper wire. The maximum length
is 2000 ft.
Install a BT485 terminator on the first and last controller on
a network segment to add bias and prevent signal distortions
due to echoing. See Fig. 40-42.
* BACnet is a registered trademark of ASHRAE (American Society
of Heating, Refrigerating, and Air-Conditioning Engineers).
†
BACview is a registered trademark of Automated Logic
Corporation.
** Halar is a registered trademark of Solvay Plastics.
††
SmokeGard is a trademark of AlphaGary-Mexichem Corp.
To wire the UPC Open controller to the BAS network:
1. Pull the screw terminal connector from the controller's
BAS Port.
2. Check the communications wiring for shorts and
grounds.
3. Connect the communications wiring to the BAS port's
screw terminals labeled Net +, Net -, and Shield.
NOTE: Use the same polarity throughout the network
segment.
4. Insert the power screw terminal connector into the UPC
Open controller's power terminals if they are not current-
ly connected.
5. Verify communication with the network by viewing a
module status report. To perform a module status report
using the BACview† keypad/display unit, press and hold
the "FN" key then press the "." Key.
To install a BT485 terminator, push the BT485, on to the
BT485 connector located near the BACnet connector.
NOTE: The BT485 terminator has no associated polarity.
To order a BT485 terminator, consult Commercial Products
i-Vu Open Control System Master Prices.
®
MS/TP Wiring Recommendations — Recommendations are
shown in Tables 12 and 13. The wire jacket and UL tempera-
ture rating specifications list two acceptable alternatives. The
Halar** specification has a higher temperature rating and a
tougher outer jacket than the SmokeGard†† specification, and
it is appropriate for use in applications where the user is con-
cerned 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.
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