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
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Description 5
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Standards Compliance 6
Configuring the Controller 7
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Using HVAC PRO for Windows Configuration Tool 7
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Defining a UNT Control Device Object *7
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Defining a UNT Control Device in Companion Software 9
Installation Procedures 11
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Design Considerations *11
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Tools Needed *11
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Environmental Information 12
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Mounting the Controller *12
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Power Line Wiring Transient Noise Precautions *16
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I/O and Communications Wiring Transient Noise Precautions 18
Wiring Details 19
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Power Source and Loads *19
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Wiring Precautions 21
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Grounding and Isolation UNT110/111, 120/121, 140/141 22
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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.
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