Metasys UNT110-1 - User Manual

Application Specific Controllers Technical Manual 636.3
UNT Controller Section
Technical Bulletin
Issue Date 0398
© 1998 Johnson Controls, Inc.
1
Code No. LIT-6363081 www.johnsoncontrols.com
Introduction Page 5
• Description 5
• Standards Compliance 6
Configuring the Controller 7
• Using HVAC PRO for Windows Configuration Tool 7
• Defining a UNT Control Device Object *7
• Defining a UNT Control Device in Companion Software 9
Installation Procedures 11
• Design Considerations *11
• Tools Needed *11
• Environmental Information 12
• Mounting the Controller *12
• Power Line Wiring Transient Noise Precautions *16
• I/O and Communications Wiring Transient Noise Precautions 18
Wiring Details 19
• Power Source and Loads *19
• Wiring Precautions 21
• Grounding and Isolation UNT110/111, 120/121, 140/141 22
• Grounding and Isolation UNT110/111, UNT120/121,
and UNT140/141 with Separate Load Transformer *23
Unitary Controller (UNT)
* Indicates those sections where changes have occurred since the last printing.

Metasys UNT110-1 Specifications

General

Model	UNT110-1
Application	HVAC and Building Automation
Input Voltage	24 VAC
Enclosure Rating	IP20
Communication Protocol	N2
Power Consumption	5 VA
Operating Temperature	-40°F to 158°F (-40°C to 70°C)
Relative Humidity	non-condensing
Type	Universal Network Controller

Summary

Introduction

Configuring the Controller

Using HVAC PRO for Windows Configuration Tool

Explains how to use HVAC PRO for Windows to configure, commission, upload, and download the UNT database.

Defining a UNT Control Device Object

Installation Procedures

Power Line Wiring Transient Noise Precautions

Discusses precautions to prevent electrical noise from affecting the controller via power lines.

I;O and Communications Wiring Transient Noise Precautions

Ensures I/O wiring and N2 Bus are clean and free from electrical noise transients.

Wiring Details

Power Source and Loads

Details power transformer compliance, load limits, and precautions for powering UNTs and multiple controllers.

Wiring Precautions

Grounding and Isolation UNT110;111, 120;121, 140;141

Explains earth ground connections for transformer secondaries and controller common terminals.

Grounding and Isolation UNT110;111, UNT120;121, and UNT140;141 with Separate Load Transformer

Details wiring for UNTs with separate load transformers, including jumper settings and isolation.

Terminal Designations

Analog Inputs

Binary Inputs

Binary Outputs (Triac Jumper Information)

UNT110;111 and UNT120;121 Triac Connections

Explains triac connections for UNT110/111 and UNT120/121 with separate load transformers.

UNT140;141 Binary Outputs

Analog Outputs

Zone Bus

Zone Bus Description

Wiring to Unit Mounted Controls-UNT110;111 and UNT120;121

Binary Output Triac Connections on Terminal Strip Versions of the UNT140;141

Wiring to RLY050;002 Relays

UNT110;111 Wired to RLY050;002 with Isolated BOs

Wiring Sensors and Actuators

M100 C Motor Zone Bus Connection Using an R81 CAA-2 Board

R81 EAA-2 UNT Controller Interface

Example of HE-6300 Humidity Sensor Connection

Example of Temperature Sensor Connection

Example of Sharing a Sensor Among UNT Controllers

Networking the Controller

N2 Bus Overview

Introduces the N2 Bus for Metasys Network communication and its general principles.

Wiring the Controller to an NCU

N2 Bus Characteristics

Installing the N2 Bus

Setting the N2 Address

Provides instructions for setting the N2 address DIP switches for controller communication.

N2 Wiring to the Network Control Module

N2 Wiring to Companion

Zone Bus Communications

CBLPRO Description

Application Examples

Downloading;Commissioning

Commissioning Procedures

Outlines the steps for commissioning a UNT after mounting, wiring, and defining features.

Via Zone Bus

Via N2 Bus

Troubleshooting

Grounding UNT110;111, UNT120;121, and UNT140;141 with an Earth Ground Connection

Troubleshooting the UNT Controller with HVAC PRO for Windows

Troubleshooting the N2 Bus

Zone Bus Troubleshooting-HVAC PRO for Windows

Specifications

Appendix A: Precautions for Rooftop Installations

Installation Requirements

Recommended Transformers

Electrical Noise in Rooftop Units

Nuisance Resets in Rooftop Units

Considerations for Gas Ignition

Appendix B: UNT100;101

Grounding and Isolation UNT100;101

Power Transformer Isolation UNT100;101

Load Isolation UNT100;101