RTU Open v5 - Installation and Start-up Guide

Sep 17, 2026

Upload by Adam

RTU Open v5 Installation and Start-up Guide provides instructions for installing and commissioning the RTU Open controller, including mounting, power wiring, and configuration steps. It covers setting the controller address, selecting communication protocol and baud rate, and wiring to BACnet networks. The guide details wiring specifications for inputs/outputs and common sensors, such as supply air temperature, duct temperature, outdoor air temperature, CO2, air quality, humidity, enthalpy, and related switches. It also includes safety considerations, start-up procedures, and a Service Test.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages137

Reading Time5 h 45 min

AccessFree to download

Introduction

What is the RTU Open controller?

Specifications

Safety considerations

Installing the RTU Open

Field-supplied hardware

To mount the RTU Open

To wire the controller for power

To set the controller's address

To set the controller's communications protocol and baud rate

Wiring for communications

Wiring inputs and outputs

Wiring sensors and switches to the controller

Start-up

Service Test

RTU Open v5 Installation and Start-up Guide ©2023 Carrier. All rights reserved. • Catalog No. 11-808-696-01 • 8/7/2023 Verify that you have the most current version of this document [from www.hvacpartners.com](from www.hvacpartners.com), the Carrier Partner Community website, or your local Carrier office. Important changes are listed in Document revision history at the end of this document. ©2023 Carrier. All rights reserved. Contents Introduction .................................................................................................................................................................. 1 What is the RTU Open controller? ......................................................................................................................1 Specifications ........................................................................................................................................................3 Safety considerations...........................................................................................................................................4 Installing the RTU Open............................................................................................................................................... 1 Field-supplied hardware ......................................................................................................................................1 To mount the RTU Open.......................................................................................................................................2 To wire the controller for power..........................................................................................................................4 To use the rooftop equipment control power transformer.................................................................. 5 To use an auxiliary control power transformer .................................................................................... 5 To set the controller's address............................................................................................................................7 To set the controller's communications protocol and baud rate ..................................................................7 Wiring for communications.................................................................................................................................8 Wiring specifications for BACnet MS/TP and ARC156 ........................................................................ 8 To wire the controller to the BACnet network ...................................................................................... 8 Wiring inputs and outputs ...................................................................................................................................9 Input wiring specifications .................................................................................................................. 10 Inputs ................................................................................................................................................... 11 Binary outputs ..................................................................................................................................... 11 Analog outputs .................................................................................................................................... 11 To wire inputs and outputs ................................................................................................................. 12 Wiring sensors and switches to the controller .............................................................................................. 16 Field-supplied sensor hardware ......................................................................................................... 17 Wiring devices to the RTU Open's Rnet port

FAQs

What are the main tasks covered to install the RTU Open v5 controller?

The guide covers mounting the controller, wiring power, setting the controller address, and configuring communications protocol and baud rate, followed by communications and I/O wiring.

How does the guide address BACnet network connectivity?

It provides wiring specifications for BACnet MS/TP and ARC156 and explains how to wire the controller to the BACnet network.

Which sensor types does the guide include for wiring to the RTU Open controller?

It includes instructions for wiring supply air temperature, duct air temperature, outdoor air temperature, CO2, outdoor air quality, relative humidity, humidistats, enthalpy switches, status switches, compressor safety, and occupancy/door contact devices.

Sep 17, 2026

Upload by Adam