AP-VMA1420-0 Johnson Controls VMA

Variable Air Volume Modular Assembly (VMA)

SKU: AP-VMA1420-0 Category: Temperature Controls Brand: Johnson Controls

Johnson Controls AP-VMA1420-0 VAV Modular Assembly (VMA) – VMA 1400 Series

The AP-VMA1420-0 Johnson Controls Variable Air Volume Modular Assembly (VMA) configurable digital controller, pressure sensor, and/or actuator housed in one pre-assembled unit.

Product Overview

The AP-VMA1420-0 is a complete Variable Air Volume Modular Assembly (VMA) controller from Johnson Controls’ VMA 1400 Series. It integrates a VAV controller, actuator, and pressure sensor in a preassembled unit. This particular model supports cooling with reheat or fan-powered configurations. It’s designed for precision control in VAV systems in HVAC, offering reliable modulation, addressable communication, and flexible installation options.

Specifications

Specification	Details
Brand / Model	Johnson Controls AP-VMA1420-0
Series	VMA 1400 Series VAV Modular Assembly
Supported Applications	Cooling with reheat or fan-powered VAV boxes
Supply Voltage	20-30 VAC, 50/60 Hz
Maximum Power Consumption	10 VA (excluding relay and valve loads)
Optional Fuse Current Rating	2.0 A for VMA1420 models
Actuator Torque	Minimum 4 N·m (≈ 35 lb-in)
Ambient Operating Temperature Range	0 to 50 °C (32 to 122 °F)
Ambient Storage Temperature	–40 to +70 °C (–40 to +158 °F)
Mounting & Terminations	6.3 mm (¼-inch) spade lugs for most terminations; communications ports use screw terminals
Communication Protocols	Supports N2 Bus and Zone Bus; addressable via DIP switches
Housing & Safety Ratings	Plastic housing; UL/94-5VB plenum flammability rating; indoor environment suitable
Weight & Dimensions	Approximate weight ~ 2.7 lbs; dimensions around 12 × 8 × 8 inches

Features & Benefits

Built-in pressure sensor and integrated actuator simplify installation and calibration
Supports both cooling with reheat and fan-powered box configurations
Addressable communications via N2 or Zone Bus provide flexibility in building automation integration
Compact, pre-wired modular assembly reduces installation time and potential wiring errors
Designed for reliability across wide temperature & humidity ranges

Applications

VAV systems in commercial buildings where control over airflow and temperature is needed
Reheat applications to maintain occupant comfort during variable load conditions
Fan-powered terminal boxes in multi-zone HVAC systems
Retrofit or replacement of existing VMA controllers

Installation & Maintenance Notes

Set communication address before or during mounting using DIP switches; consult control software for settings
Mount controller so wiring is accessible; ensure proper alignment with damper shaft and use correct set-screw methods
Provide clean supply voltage and avoid electrical noise on control wiring
Periodic calibration, temperature verifications, and actuator feedback checks help ensure long-term performance