Technical Bulletin
Issue Date 11/01/01
© 2001 Johnson Controls, Inc. www.johnsoncontrols.com
Code No. LIT-6363125
T
ECHNICAL
B
ULLETIN
Mounting and Wiring Variable Air Volume Modular
Assembly (VMA) 1400 Series Controllers
Mounting and Wiring VMA1400 Series Controllers ...........................3
Introduction......................................................................................................... 3
Key Concepts...................................................................................................... 4
VMA Position and Orientation..........................................................................................4
Damper Actuator Direction to Close ................................................................................4
N2 Address Switches ......................................................................................................4
Wiring and Cabling Precautions ......................................................................................5
General Wiring Information..............................................................................................6
Power Source Wiring.......................................................................................................6
Phone Jack Polarization ................................................................................................10
Sensor Interfaces ..........................................................................................................11
Procedure Overview......................................................................................... 14
Detailed Procedures......................................................................................... 16
Preparing the VMA for Mounting....................................................................................16
Mounting the VMA1410/1420 ........................................................................................18
Mounting the VMA1430 .................................................................................................18
Setting the Damper Position (VMA1410, 1420, or VMA1430 with External Actuator).....19
Wiring the VMA .............................................................................................................21
Connecting the N2 Bus..................................................................................................24
Reference Information ..................................................................................... 26
VMA Wiring List.............................................................................................................26
VMA Single Duct Application Wiring Diagram................................................................28
VMA Single Duct Supply/Exhaust Wiring Diagram ........................................................29
VMA Dual Duct Application Wiring Diagram ..................................................................30