Carrier Comfort Network ® Interface; Optional Upc Open Controller Wiring - Carrier AquaEdge 19XRV Installation Instructions Manual

Connect Power Wires to Oil Pump Contacts — See Fig. 42.
Connect power wires to oil pump contacts mounted in
machine power panel. Use separate fused disconnect or circuit
breaker as shown on job wiring diagrams and Fig. 42. Check
that power supply voltage agrees with oil pump voltage. Fol-
low correct phasing for proper motor rotation.
Connect Power Wires to Oil Heater Contactor — Connect
control power wiring between the oil heater contactor termi-
nals and terminals LL1 and LL2 on the field wiring strip in the
compressor motor starter. See Fig. 43 and wiring label on the
machine power panel.
WARNING
Voltage to terminals LL1 and LL2 (of each circuit) comes
from a control transformer in a starter built to Carrier speci-
fications. Do not connect an outside source of control
power to the compressor motor starter (terminals LL1 and
LL2 of each circuit). An outside power source will produce
dangerous voltage at the line side of the starter because
supplying voltage at the transformer secondary terminals
produces input level voltage at the transformer primary ter-
minals. Severe injury could result.
Connect Wiring to VFD — Connect control wiring to the
VFD. All control wiring must use shielded cable. Also, con-
nect the communications cable. Refer to the job wiring dia-
grams for cable type and cable number. Make sure the control
circuit is grounded in accordance with applicable electrical
codes and instructions on machine control wiring label.
CARRIER COMFORT NETWORK
Carrier Comfort Network (CCN) communication bus wiring is
supplied and installed by the electrical contractor. It consists of
shielded, 3-conductor cable with drain wire.
The system elements are connected to the communication
bus in a daisy chain arrangement. The positive pin of each sys-
tem 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. 44 for location of the CCN network connections on the ter-
minal strip labeled CCN.
a19-638
LEGEND
Factory Wiring
Field Wiring
Oil Pump Terminal
Power Panel Component Terminal
Fig. 42 — Oil Pump Wiring
LEGEND
Power Panel Component Terminal
Fig. 43 — Oil Heater and Control Power Wiring
® INTERFACE — The
a19-1696
NOTE: Conductors and drain wire must be 20 AWG minimum
stranded, tinned copper. Individual conductors must be insu-
lated 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 –4 F to 140 F (–20 C to 60 C)
is required. See table below for cables that meet the require-
ments.
MANUFACTURER
ALPHA
AMERICAN
BELDEN
COLUMBIA
When connecting the CCN communication bus to a system
element, a color code system for the entire network is recom-
mended to simplify installation and checkout. The following
color code is recommended:
SIGNAL TYPE
+
GROUND
–
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. 44. 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 19XRV chiller to the network, proceed as
follows (see Fig. 44):
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 interface located in the con-
trol panel.
Optional UPC Open Controller Wiring —
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 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. 45-47.
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.
*Teflon is a registered trademark of Dupont.
†
BACnet is a registered trademark of ASHRAE (American Society
of Heating, Refrigerating and Air-Conditioning Engineers).
64
CABLE NO.
2413 or 5463
A22503
8772
02525
CCN BUS
CCN NETWORK
CONDUCTOR
INTERFACE
INSULATION
(CONTROL PANEL)
COLOR
Red +
White G
Black –
The