VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 4
Table 1: VMA1400 Series Comparison Checklist
VMA Features 1410 1420 1430 Comments
Applications
Pattern Recognition Adaptive
Control (PRAC) on Zone Proportional
plus Integral plus Derivative (PID)
Temperature Loops
Y Y Y Eliminates manual tuning and
seasonal re-tuning
Adaptive Flow Control Loops
Y Y Y Eliminates manual tuning,
improves control and energy
savings
Single Duct, Pressure Independent
VAV
Y Y Y Meets most VAV applications
Side Loops without Interlocking
N Y Y Single Analog Input (AI) to Analog
Output (AO) or Binary Output
(BO)
Single Duct Supply/Exhaust VAV
N Y Y Flow differential control
Fan Powered Boxes
N Y Y Series or parallel
Incremental, Proportional
Two Position, and Three Stages of
Box Heat
N Y Y Staged heat or normally
open/normally closed valves
Incremental, Proportional
Two Position, or One Stage
Supplemental Heat
N Y Y Normally open or closed valves
Dual Duct, Pressure Independent
VAV
N Y Y Flexible flow setpoint specification
Damper Actuator (Internal)
Accurate Positioning
Y Y N/A 23,000 step resolution
Stall Detection
Y Y N/A Detects damper travel stops
Automatic Damper End Stop
Detection at Power Up
Y Y N Sets damper stroke time
Clockwise (CW)/
Counterclockwise (CCW)
Rotation Selection
Y Y Y Set via HVAC PRO™ software for
either direction to close
EP8000 with Pneumatic Actuator
N Y Y
Software Tools
Ability To Download Code Firmware
Y Y Y Allows firmware code upgrade
without removing the VMA
Diagnostics
Moving Average Flow/Temperature
Diagnostic
Y Y Y Provides standard measure of
control loop performance over
time
Actuator Stall
Y Y N/A
Flow Test
Y Y Y
Data Graphing
Y Y Y Only for single duct applications
Starved Box Detection
Y Y Y Allows air handler reset and flow
diagnostics
Actuator Duty Cycle Diagnostic
Y Y Y Indicates shaft slippage
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