Product sheet SDM24 VA7482 2001 RA

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VA-748x

Electric Terminal Unit Actuator

PB_VA-748x_01 2021

January 2021

Product Bulletin

The VA-748x Series Electric Terminal Unit Valve Actuator

provides oating, proportional, or proportional control

with 0-10V position feedback signal and electric fail safe

function in HVAC applications. The compact design of

this actuator series makes it suitable for installation in

conned locations, such as fan coils, chilled ceilings,

manifolds, and more.

The VA-748x Series Actuator is designed for eld

mounting onto Johnson Controls and competitors’ ter-

minal unit valves. Due to the innovative concept of auto

stroke detection, the VA-748x can be installed over most

of the conventional terminal unit valves and pressure

independent control valves (PICV) with variable strokes

on the market.

• Low and line voltage — Flexible applications

• Floating and proportional control — Flexible applications

• Voltage and current analog input — Suitable for any controller

• Di󰀨erent analog input ranges — Flexible applications

• Di󰀨erent actuator speeds — New market opportunities

• Double and RGB colour LED — Provide information about status and diagnostic

• Removable cable — No expert required for connection or replacement

• Di󰀨erent cable length available as separate kit — OEM’s version easily available

• Auto stroke detection — Suitable for valve with variable stroke

• Feedback control — 0-10 VDC with max. 2mA output current

• Electrical fail safe — Protects the equipment and the system from damage, while enhancing overall e󰀩ciency

Features

Overview

Figure 1: VA-748x Series Electric Terminal Unit Actuator

Summary of content (20 pages)

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VA-748x Electric Terminal Unit Actuator PB_VA-748x_01 2021 January 2021 Product Bulletin Overview The VA-748x Series Electric Terminal Unit Valve Actuator provides floating, proportional, or proportional control with 0-10V position feedback signal and electric fail safe function in HVAC applications. The compact design of this actuator series makes it suitable for installation in confined locations, such as fan coils, chilled ceilings, manifolds, and more.
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VA-748x Ordering codes Control type Power supply Running time Nominal force Product codes VA-7480-0011 VA-7481-0011 8 sec/mm VA-7480-0001 13 sec/mm 24 VAC VA-7481-0001 3m 2m --- 5m IP54 M30x1.5 --- 230 VAC VA-7481-0003 120 N 1.5 m 3.2 mm VA-7482-2001 4.3 mm VA-7482-3001 6.0 mm VA-7482-1001-RA VA-7482-1301-RA 120 N VA-7482-2001-RA 3.2 mm 4.3 mm VA-7482-0011 VA-7482-0311 --- VA-7482-0312 VA-7482-2201-TA 140 N VA-7482-2501-TA VA-7482-5001 4.3 mm --- 1.5 m M30x1.
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VA-748x Accessories (order separately) Accessories codes Description Packing VA-7480-CAB21 Floating 24V – 2 m length VA-7480-CAB31 Floating 24V – 3 m length VA-7480-CAB51 Floating 24V – 5 m length VA-7480-CAB11 Floating 24V – 10 m length VA-7480-CAB33 Floating 230V – 3 m length VA-7480-CAB53 Floating 230V – 5 m length VA-7480-CAB73 Floating 230V – 7 m length VA-7480-CAB13 Floating 230V – 10 m length VA-7482-CAB21 Proportional 24V – 2 m length VA-7482-CAB31 Proportional 24V – 3 m length
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VA-748x Danfoss Frese Industrie Technik Oventrop Sauter Schneider Electric Siemens TA Hydronics Fratelli Pettinaroli Watts Industries Controlli Actuator codes Johnson Controls Valve compatibility (1/2) --- --- --- --- --- --- --- --- --- --- --- VA-7480-0011 VA-7480-0312 VA-7481-0011 VA-7480-0013 VA-7481-0013 VA-7482-0011 VG4000 Series (discontinued) VG5000 Series (discontinued) VA-7482-0311 VA-7482-0312 VA-7480-0001 VUL Series VG3000 Series VA-7481-0001 COCON QTZ (DN10-DN32)
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VA-748x VA-7482-5001 --- --- VA-7482-6001 --- --- VA-7482-7001 --- --- Schneider Electric Siemens TA Hydronics Fratelli Pettinaroli Watts Industries Controlli VA-7481-4003 Sauter VA-7480-4003 Optima Compact 53-13xx (DN10-DN32) Optima Compact 53-13xx 2,5 mm (DN10-DN20) Optima Compact 53-13xx 5,0 mm (DN10-DN20) Optima Compact 53-13xx 5,5 mm (DN25-DN32) Oventrop --- Industrie Technik --- VA-7480-4001 Frese Danfoss Actuator codes Johnson Controls Valve compatibility (2/2) --- ---
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VA-748x Operation 24 VAC Floating Model 230 VAC Floating Model When the signal is applied to the black and red wires, the actuator stem extends. When the signal is removed the actuator remains in position. If the signal remains applied to the red wire, the actuator will time out and shut off the motor after approximately 90 seconds (13 sec/mm models) and approximately 60 seconds (8 sec/ mm models). When the signal is applied to the blue and brown wires, the actuator stem extends.
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VA-748x 24 VAC/VDC Proportional Model with fixed stroke VA-7482-xx01 Factory Stroke configured series (jumper setting) When the power is applied, the actuator self-calibrates performing an auto-zero detection cycle. The actuator moves the stem down for a complete mechanical valve stroke until no changes are detected. Once the auto-zero is detected the actuator moves the stem accordingly with the input signal, within the value of the electrical stroke as per jumper setting.
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VA-748x 24 VAC/VDC Proportional Model with 0-10 VDC feedback output (VA-7483 and VA-7484) Position feedback The position feedback signal is for monitoring the actuator stroke position. It feeds information internally to the positioner and a 0-10 VDC signal can supply an external supervisory system. See Table 5 for correspondence between control signal and feedback output.
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VA-748x Operating status indication 24 VAC/230 VAC Floating Model 24 VAC/VDC Proportional Model with feedback The floating models are equipped with a green LED which provides information about the operating status. The proportional models are equipped with a bi-colour LED (green-red) which provides information about the operating status and diagnostics.
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VA-748x Mounting instructions When mounting the actuator on terminal unit valves, follow these instructions: • Never use the actuator as a mounting lever. • It is recommended that the valves be mounted upright or at angles not greater than 90° in an easily accessible location. • Never grab the actuator and forcibly turn it. To reposition the actuator on the valve, loosen the coupling, reposition the actuator and then retighten the brass coupling by hand.
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VA-748x Removing actuator from valve IMPORTANT: Do not remove the actuator without switching off its power supply In some situations, you may need to mount the actuator to a new valve with different closing dimensions. For example, if a Pressure Independent Control Valve (PICV) needs to be repositioned with a new stroke setting to suit new flow requirements, or a new valve with different closing dimensions replaces the old one. To safely mount the actuator to the new valve, complete the following steps: 4.
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VA-748x Wiring instructions 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. • all wiring should conform to local codes and must be carried out by authorized personnel only. • keep high and low voltage wiring separated. • when using multi-stranded wire apply a cable ferrule to the cable end.
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VA-748x Dip switch settings (Proportional Models only) VA-7482 Models These 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 5 6 3 3 4 5 DA RA LIN Eq% 6 2 5 1 4 ON OFF 2...10VDC 4...20mA 3 0...5VDC 2 0...10VDC 0...20mA 1 2 5...
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VA-748x Dip switch 5 Use the dip switch 5 to change the control characteristics of the actuator in order to obtain a combination of valve and actuator linear or almost equal percentage. Dip switch 5 OFF (linear) Use this option with linear or equal percentage control valves. Dip switch 5 ON (almost equal percentage) Use this option with quick opening or on/off control valves.
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VA-748x Power-on To power on, connect the configuration tool to the actuator’s dedicated port and press the encoder button for more than 2 seconds. Note: The configuration tool will automatically power off after a few seconds if it does not detect any connected actuator. Configuration process Use the rotary encoder to navigate through the menu. Rotate clockwise to show the next item on the display, and counterclockwise to show the previous one.
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VA-748x Safe unmounting procedure To safely remove the actuator from the valve when it is set with Electrical Fail Safe Down (EFSD) configuration, complete the following step. Note: The configuration tool must be connected to the actuator following the dedicated procedure. In the first level menu choose the Safe Unmounting option. This will cause the actuator to fully retract the spindle, allowing the safe removal of the actuator from the valve.
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VA-748x Electrical actuator stroke and closing dimensions All the Proportional models with factory stroke configuration option have 1 jumper with which the user can change the electrical stroke. All the Floating models have fixed stroke and the jumper option is not available. 6 The actuators are delivered with the following factory settings (see table below). Note: All Proportional models with Auto stroke detection do not require the jumper as they can detect the real valve stroke automatically.
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VA-748x Dimensions 49 mm 73.
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VA-748x Technical specifications VA-7480-x0x1 VA-7481-00x1 VA-7481-x0x3 VA-7481-x0x3 VA-7482-x002-RA VA-7482-x0x1 VA-7483-x201VA-7484-x001 Actuator models Action control Floating or PAT Supply voltage (50/60Hz) 24 VAC ±15% Proportional 24 VAC ±15% 24 VDC ±15% 230 VAC ±10% Feedback Signal Rating --- 0-10 VDC ±5% --- max 2 mA at 0-10 VDC Input impedance Voltage --- >100 kΩ Current --- 500 Ω Power consumption Apparent (Running) 2.5 VA 6.0 VA 2.5 VA Active (Running) 1.5 W 2.2 W 1.
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VA-748x Single point of contact APAC Europe NA/SA JOHNSON CONTROLS C/O CONTROLS PRODUCT MANAGEMENT NO. 32 CHANGJIJANG RD NEW DISTRICT WUXI JIANGSU PROVINCE 214028 - CHINA JOHNSON CONTROLS WESTENDHOF 3 45143 ESSEN GERMANY JOHNSON CONTROLS 507 E MICHIGAN ST MILWAUKEE WI 53202 USA Contact information Contact your local branch office: www.johnsoncontrols.com/locations Contact Johnson Controls: www.johnsoncontrols.