VA-7700-GGA-2 Johnson Controls Actuator

Overview

The Johnson Controls VA-7700-GGA-2 is a compact, synchronous motor-driven electric non-spring return actuator designed to provide precise proportional control for valves in HVAC systems. It automatically adjusts its linear stroke position based on standard input signals, featuring an intelligent microprocessor that handles self-calibration, diagnostic checks, and signal failure safety positioning.

Features

• Proportional Control: Delivers precise linear valve positioning in response to multiple selectable input signals.
• LED Status Indicator: Features a column of five LEDs for easy local visualization of the actuator stroke position, operating status, and retry diagnostics.
• C-Shaped Yoke Design: Unique enclosure structure enables lateral mounting, minimizing the vertical clearance space needed above the valve assembly.
• Magnetic Clutch: Provides a constant output force for reliable close-off while protecting the motor from damage during stall conditions.
• Signal Failure Preset: Allows the stem to automatically move to a pre-selected up or down position if the control signal is lost.
• Self-Calibration: Supports easy commissioning through an auto-calibration cycle that automatically detects the valve’s physical stroke limits.

Specifications

• Power Supply: 24 VAC (20.4 to 27.6 VAC) at 50/60 Hz, 4.3 VA running consumption.
• Input Signal Options: 0 to 10 VDC, 0 to 5 VDC, 5 to 10 VDC, 0 to 20 mA, or 4 to 20 mA (selectable via internal DIP switches).
• Output Force: 90 lb (400 N) minimum.
• Stroke Capability: 3/8 inch (8 mm) to a maximum of 3/4 inch (20 mm).
• Enclosure Protection: IP54 / NEMA 2 rated housing.
• Operating Ambient Temperature: 23°F to 131°F (-5°C to 55°C).
• Electrical Connections: 120-inch (3.05 m) UL plenum-rated cable with 19 AWG conductors.

Applications

• Designed for heating, ventilation, and air conditioning (HVAC) systems in commercial buildings.
• Formulated for direct integration with Johnson Controls VG7000 Series Bronze Control Valves and VB Series Brass Flare Valves using the included jam nut.
• Suitable for parallel and sequential control sequences within building automation networks.