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UNT110-1
Johnson Controls UNT110-1 User Manual
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42
UNT Controller—Unitary
(UNT) Controller
Note:
I
f the master Zone Sensor uses the Zone Bus connection, only
the
master controller can be loaded and commissioned from the sensor
connection. The AI
offset feature in HVAC PRO for Windows will
have to adjust 1
°
F at the slave AIs to compensate for each
additional controller sharing a sensor.
41
43
Table of Contents
Introduction
5
Description
5
Standards Compliance
7
Installation Procedures
9
Design Considerations
9
Tools Needed
9
Environmental Information
10
Mounting the Controller
10
Power Line Wiring Transient Noise Precautions
14
I/O and Communications Wiring Transient Noise Precautions
16
Wiring Details
17
Power Source and Loads
17
Wiring Precautions
19
Grounding and Isolation UNT110/111, 120/121, 140/141
20
Grounding and Isolation UNT110/111, UNT120/121, and UNT140/141 with Separate Load Transformer
21
Terminal Designations
23
Analog Inputs
28
Binary Inputs
29
Binary Outputs (Triac Jumper Information)
29
Analog Outputs
30
Zone Bus
30
Wiring to Unit Mounted Controls--UNT110/111 and UNT120/121
31
Wiring to RLY050/002 Relays
33
Wiring Sensors and Actuators
35
Networking the Controller
43
N2 Bus Overview
43
Installing the N2 Bus
44
Zone Bus Communications
46
Application Examples
49
Fan Coil Applications
49
Unit Vent Applications
51
Packaged Rooftop Applications
53
Heat Pump Applications
55
Downloading/Commissioning
57
Commissioning Procedures
57
Via Zone Bus
57
Via N2 Bus
57
Troubleshooting
59
Hardware Installation Inspection
59
Tools Needed for Troubleshooting
59
Installation Checkout
59
Troubleshooting the UNT Controller with HVAC PRO for Windows
65
Troubleshooting the N2 Bus
67
Zone Bus Troubleshooting—HVAC PRO for Windows
68
Configuring the Controller
69
Using HVAC PRO for Windows Configuration Tool
69
Defining a UNT Control Device Object
69
Defining a UNT Control Device in Companion or Facilitator Software
71
Ordering Information
73
Johnson Controls Code Numbers
73
Vendor Code Numbers
76
Specifications
77
Appendix A: Precautions for Rooftop Installations
79
Environmental Information
79
Installation Requirements
79
Electrical Noise in Rooftop Units
81
Nuisance Resets in Rooftop Units
82
Considerations for Gas Ignition
84
Considerations for Specific Rooftop Units
88
Appendix B: UNT100/101
91
What’s Different About the UNT100/101
91
UNT100/101 Terminal Designations
91
Grounding and Isolation UNT100/101
93
Binary Inputs
94
Binary Outputs
94
4
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Johnson Controls UNT110-1 Specifications
General
Brand
Johnson Controls
Model
UNT110-1
Category
Controller
Language
English
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