Installing the RTU Open
RTU Open v3 CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
23
1 Remove power from the RTU Open.
2 Partially cut, then bend and pull off the outer jacket of the Rnet cable(s). Do not nick the inner insulation.
Strip about .25 inch (.6 cm) of the inner insulation from each wire.
Outer Jac
k
et
Inner insulation.25 in.
(.6 cm)
3 Wire each terminal on the sensor to the same terminal on the controller. See diagram below.
Carrier recommends that you use the following Rnet wiring scheme:
Red
Black
White
Green
+12V
Rnet-
Rnet+
Gnd
4 Apply power to the RTU Open.
To wire the Wireless Adapter for wireless sensors
• Do not apply line voltage (mains voltage) to the Wireless Adapter.
• In order for the RTU Open to receive the signal from a wireless sensor, the Wireless Adapter
be
mounted inside the building and then connected to the RTU Open's Rnet port, strictly adhering to the Rnet
wiring specifications (page 22). Do NOT mount the Wireless Adapter outdoors.
The Carrier wireless sensors are available in 868, 902, and 928 MHz radio frequency. The sensors are thermistor-
based temperature sensors that may optionally sense humidity.
Wireless sensors communicate through a Wireless Adapter, which is wired to the Rnet port of the controller. See
Warning above.
• A v6.5 or later i-Vu® system
• v6-xx-xxx or later controller drivers
To configure the control program for the desired user interaction with the sensor, see the Wireless Sensors
Application Guide. For detailed instructions, see the Wireless Sensors Installation Guide.
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