Technical Bulletin
Issue Date February 28, 2006
Variable Air Volume Modular Assembly (VMA) 1400
Series Overview and Engineering Guidelines
VMA1400 Series Overview and Engineering Guidelines ...................2
Introduction......................................................................................................... 2
Key Concepts...................................................................................................... 3
VMA1400 Series Models...................................................................................................3
VAV System......................................................................................................................6
Definition of Terms............................................................................................................9
Room Sensor Placement ................................................................................................10
Pressure Independence..................................................................................................10
VMA Airflow Rate............................................................................................................10
Power Source..................................................................................................................11
N2 Bus Rules ..................................................................................................................12
Inputs and Outputs..........................................................................................................13
Zone Bus.........................................................................................................................14
CablePRO.......................................................................................................................15
CVTPRO .........................................................................................................................15
Related Documentation...................................................................................................16
Application Examples......................................................................................................17
Reference Information.....................................................................................................26
Specifications..................................................................................................................27
Detailed Procedures......................................................................................... 32
Determining VAV Box Requirements..............................................................................32
Establishing the Room Schedule ....................................................................................32
Developing the Bill of Material and Placing Orders.........................................................33
Configuring the VMA.......................................................................................................35
© 2006 Johnson Controls, Inc. www.johnsoncontrols.com
Code No. LIT-6363120
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