Installing the VAV Zone II
VAV Zone II Controllers
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
16
Wiring specifications for BACnet MS/TP and ARC156
Cable:
22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire
Maximum length:
2000 feet (610 meters)
WARNING
Do not apply line voltage (mains voltage) to the controller's ports and terminals.
To wire the controller to the BACnet network
WARNING
Attaching any ARCNET or MS/TP network to the
Act Net
port damages BT485s, DIAG485s, or
terminating resistors on that network.
1
Pull the screw terminal connector from the controller's power terminals labeled
Gnd
and
24 Vac
.
2
Check the communications wiring for shorts and grounds.
3
Connect the communications wiring to the controller’s screw terminals labeled
Net +
,
Net -
, and
Shield
.
NOTE
Use the same polarity throughout the network segment.
4
Set the communication type and baud rate.
For...
Set BACnet ARC156 or MS/TP
jumper to...
Set DIP switches 1 and 2 to...
ARC156
ARC156
N/A. Baud rate will be 156 kbps regardless of the
DIP switch settings.
MS/TP
MS/TP
The appropriate baud rate. See the
MS/TP Baud
diagram on the controller.
NOTE
Use the same baud rate for all controllers on the network segment.
5
If the VAV Zone II is at either end of a network segment, connect a BT485 to the VAV Zone II.
6
Insert the power screw terminal connector into the VAV Zone II's power terminals.
7
Verify communication with the network by viewing a Module Status report in the i-Vu® interface.
Summary of Contents for VAV Zone II
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