Johnson Controls VA-7746-1001 - User Manual

PB_VA-7700_Electricl Valve Actuators_02 2011
■■ Self■adjusting■proportional■actuators■
Easy, quick and precise commissioning servicing
■■ Column■of■5■Light■Emitting■Diodes
Allows easy visualisation of actuator stroke position and of the actuator status
■■ Optional■models■with■mechanical■manual■override
Allows manual positioning independent of the power supply
■■ Manual■contact■micro■switch■on■all■models■with■manual■override
Signals actuator mode status (automatic or manual) to external supervisory system.
■■ IP54■protection■class
Allows installation in a wide range of environments
■■ Unique■“C”■shaped■yoke■design
Allows lateral mounting of the actuator reducing the vertical space over the valve needed for
installation.
■■ Positioner■with■selectable■starting■point■and■span,■direct■and■reverse■action■modes
Enables sequence control
■■ Magnetic■clutch
Provides constant output force for close-off of valves, and protects motor in stall conditions
■ “Control-Signal■failure■”■stem■to■pre-determined■position
Actuator pre-set position after a control signal failure (extended/retracted), is selectable in-situ
The VA-77xx Series synchronous motor driven actuator, for
valves in heating, ventilation and air conditioning applications,
is available for floating (3-point) control or proportional control
with 0-10 V position feedback signal.
It provides a stroke capability of 8 mm to a maximum 20 mm.
This compact, non spring return actuator has a 500 N nominal
force and responds to a variety of input signals.
The actuator can be combined with VG7000, VG9000
and VGS8… valves in accordance with the maximum
close-off pressure ratings specified (see pertinent valve
product bulletins).
They can be ordered as a separate unit or as a factory fitted
valve / actuator combination.
VA-7700■Series
Electric■Valve■Actuators

Johnson Controls VA-7746-1001 Specifications

General

Supply Voltage	24 VAC
Timing	90 seconds for 90° rotation
Weight	1.1 lb (0.5 kg)
Controller Type	Electronic Valve Actuator
Control Signal	2-10 VDC or 4-20 mA
Operating Temperature	-20 to 50 °C
Humidity Range	10% to 90% RH non-condensing

Summary

VA-7700 Series Electric Valve Actuators

Operation Modes and Calibration

Auto Calibration Procedure

DIP Switch Settings

Control Signal Type and Range Configuration

Setting DIP switches for signal type (VDC/mA) and control signal ranges.

Action and Manual Override Settings

Configuring action mode (DA/RA) and electrical manual override via DIP switches.

Control Signal Failure Position Preset

Status Indication and Fault Diagnosis

Fault Mode and Specific Alarm Codes

Diagnosing actuator faults using LED patterns and specific fault indications.

Installation and Wiring

Mounting Instructions and Precautions

General Wiring Instructions and Safety

Wiring requirements, local regulations, and electrical safety warnings.

Dimensions

Actuator Dimensional Drawings

Technical Specifications

Model and Supply Voltage Specifications

Details on floating and proportional models, including supply voltage ranges.

Control Signal and Manual Override Details

Information on control signals, feedback, and manual override types.

Performance and Material Specifications

Covers power consumption, force, stroke, enclosure, materials, and ambient conditions.

Wiring, Weight, and Compliance