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VA-748x
Electric■Terminal■Unit■Actuator
Product Bulletin
The VA-748x Series provides floating or proportional
control in HVAC applications.
The compact design of this actuator makes it suitable for
installation in confined spaces, such as fan coil, chilled
ceiling, manifolds, etc.
The VA-748x Series actuator is designed for field
mounting onto Johnson Control and competitor's Terminal
Unit Valves.
Due to the innovative concept of different strokes setting
the VA-748x can be installed over most of the terminal
unit valve in the market.
■ ■ Low■and■line■voltage
Flexible applications
■ ■ Floating■and■proportional■control
Flexible application
■ ■ Voltage■and■current■analog■input■
Suitable for any controller
■ ■ Different■analog■input■ranges
Flexible applications
■ ■ Different■actuator■speed
New market opportunities
■ ■ Double■colour■LED
Provide information about status and diagnostic
■ ■ Removable■cable
No expert requires for connection or replacement
■ ■ Different■cable■length■available■as■separate■kit
OEM's version easily available
PB_VA-748x_12 2012
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Table of Contents
Related Manuals for Johnson Controls VA-7481-0011
Summary of Contents for Johnson Controls VA-7481-0011
- Page 1 PB_VA-748x_12 2012 VA-748x Electric■Terminal■Unit■Actuator Product Bulletin The VA-748x Series provides floating or proportional control in HVAC applications. The compact design of this actuator makes it suitable for installation in confined spaces, such as fan coil, chilled ceiling, manifolds, etc. The VA-748x Series actuator is designed for field mounting onto Johnson Control and competitor's Terminal Unit Valves.
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Page 2: Ordering Codes
Field■ Stroke■ Thread■ Factory■ Special■ Valve■ Product■Code Supply Type Speed Force Config. Config. mounted Config. Combination VA-7480-0011 13sec/mm 24Vac VA-7481-0011 8sec/mm Floating VA-7480-0013 13sec/mm 1.5m VG4000 230Vac M28x1.5 VG5000 VA-7481-0013 8sec/mm VA-7482-0011 24Vac/ Proportional 8sec/mm VA-7482-0311 VA-7480-0001 13sec/mm 24Vac V5000... -
Page 3: Operation
PB_VA-748x_12 2012 Operation 24Vac Floating Model 24Vac/Vdc Proportional Model When the signal is applied to the black and red wires, the Calibration■Cycle actuator stem extends. When the signal is removed the When the power is applied, the actuator self-calibrates actuator remains in position. performing a complete cycle. -
Page 4: Operating■Status■Indication
PB_VA-748x_12 2012 Operating■status■indication 24Vac/ 230Vac Floating Model 24Vac/Vdc Proportional Model The floating models are equipped with a green LED The proportional models are equipped with a bi-colour which provides the information about the operating status LED (green-red) which provides the information about the as follow: operating status and diagnostic as follow: No■power■supply... -
Page 5: Wiring■Instruction
PB_VA-748x_12 2012 Wiring■Instruction ■WARNING When■servicing■make■sure■that: • The electric supply to the actuator is switched off to avoid possible damage to the equipment, personal injury or shock. • You do not touch or attempt to connect or disconnect wires when electric power is on. •... - Page 6 PB_VA-748x_12 2012 Dip■switch■settings■for■Proportional■model■only■(VA-7482) All the proportional models have a 6 dip switches which allow the user to field configure the actuator. The actuator is factory released with all the dip switches in OFF position. 4: ACTION CONTROL SIGNAL 5: CURVE RANGE 6: SIGNAL TYPE Dip■Switch■1■–■2■–■3■–■6■...
- Page 7 PB_VA-748x_12 2012 Dip■Switch■5 The dip switch 5 allows the user to change the control characteristic of the actuator in order to obtain the a combination of valve and actuator linear or almost equal percentage. The■dip■switch■5■OFF■(Linear) We recommend to use with valve with linear or equal percentage control characteristic. The■dip■switch■5■ON■(almost■Equal■Percentage) We recommend to use with valve with quick opening or on/off control characteristic.
- Page 8 PB_VA-748x_12 2012 Jumper■setting■for■Proportional■model■only■(VA-7482) All the proportional models have 1 jumper which allow the user to change the following parameters: Proportional model VA-7482-0011 (suitable for the VG5000 and VG4000) For proportional actuator suitable the VG5000 or VG4000, the jumper allow the user to set push down to close (PDTC) or push down to open (PDTO) function.
- Page 9 PB_VA-748x_12 2012 Proportional model VA-7482-x001 (suitable for the V5000, VG6000 and VP1000) For proportional actuator suitable the V5000, VG6000 and VP1000 the jumper allow the user to set the actuator stroke. VA-7482-1001■(suitable■for■VG6000■and■VP1000■-■DN15■and■DN20) The actuator is factory set with stroke 3.2 mm but at convenience the stroke can be changed to 4.3 mm or 6.0 mm in case the same actuator is mounted on competitors valves.
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Page 10: Dimensions (Mm)
PB_VA-748x_12 2012 Dimensions■(mm) 49 mm 79,5 80 mm... -
Page 11: Technical■Specifictions
Johnson Controls are registered trademarks of Johnson Controls, Inc. ® ® All other marks herein are the marks of their respective owners. © Copyright 2012 Johnson Controls, Inc. All rights reserved. Any unauthorized use or copying is strictly prohibited. www.johnsoncontrols.com...
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