Johnson Controls VA7820-GGx-1x Electric Valve Actuators Instruction Manual

Johnson Controls VA7820-GGx-1x Electric Valve Actuators

Product Information

VA7820-GGx-1x / VA7830-GGx-1x Electric Valve Actuators – Spring Return Models

The VA7820-GGx-1x / VA7830-GGx-1x Electric Valve Actuators are spring return models designed for controlling the opening and closing of valves. These actuators are suitable for use with VGS8xxx (DN15…50) / VG8000 (DN15…40) / VG9000 (DN15…65) valves.

General Features

• Model: VA7820-GGx-1x / VA7830-GGx-1x
• Mounting: Can be mounted on VGS8xxx (DN15…50) / VG8000 (DN15…40) / VG9000 (DN15…65) valves

Dimensions and Mounting Components

Figure 1: Dimensions in mm and mounting components

Mounting Positions

Figure 2: Mounting positions

Manual Positioner

Figure 3: Manual positioner

The VA7820-GGx-1x / VA7830-GGx-1x Electric Valve Actuators are equipped with a manual positioner that allows for manual control of the spindle when the power supply is not present.

Manual Positioner Usage Instructions:

1. MOVE: Insert the crank (located under the actuator) into the hexagonal hole on top of the actuator. Turn the crank in the direction indicated by the arrow to move the spindle to the desired position.
2. LOCK: When the spindle is in the desired position, push down completely and let the shaft rotate in the opposite direction until it stops. Remove the crank.

Mounting Instructions

Figure 4: Mounting the actuator on the valve (VA78x0-xxx-11)

Follow these steps to mount the actuator on the valve:

1. Ensure that the coupler is in the correct position. If not, readjust it using the manual override.
2. Extend the valve stem completely and manually tighten the lock nut.
3. Position the actuator on the valve bonnet and close the locking yoke.
4. Fix the actuator on the valve by tightening the screw.
5. Manually tighten the coupler until it holds the valve stem securely.
6. Manually tighten the lock nut counter-clockwise until it stops.
7. Hold the coupler and tighten the lock nut.

READ THIS INSTRUCTION SHEET AND THE SAFETY WARNINGS CAREFULLY BEFORE INSTALLING AND SAVE IT FOR FUTURE USE.

General Features

VA78x0-xxx-1x model can be mounted on VG7000T valves:

• DN25…50 if brass trim
• DN15…50 if stainless steel trim

VA78x0-xxx-12 model can be mounted on VGS8xxx (DN15…50) / VG8000 (DN15…40) / VG9000 (DN15…65) valves.
Figure 1: Dimensions in mm and mounting components

Mounting

Figure 2: Mounting positions

IMPORTANT: It is recommended to set the actuator to the desired control signal and action before fitting to the valve.
(See Figure 6: Wiring diagrams and Table 1: DIP switch settings).

Tools

• Allen wrench, 4 mm
• Screw driver, 5 mm or #2

Only for VA78x0-xxx-11 models:

• Hex wrench, 14 mm and 19 mm

Manual positioner
These models of actuators are equipped with a manual positioner that allows to move the spindle only when the power supply is not present.

WARNING:

• It is recommended to use the manual positioner only when the actuator is not powered, because the actuator spindle retains its position until the power supply is connected. (The controller takes first priority.)
• Be sure that the actuator has reached the rest position (stem extended or retracted, depending on the model), before manually positioning the actuator.
• After any manual operation, it is recommended to restart the self calibration cycle, or wait for the next valve full stroke cycle for the automatic calibration of the actuator.

Figure 3: Manual Positioner

1. MOVE: Insert the crank (under the actuator) into the hexagonal hole located on top of the actuator. Turn in the direction indicated by the arrow to move the spindle to the desired position.
2. LOCK: When the spindle is in the desired position, push down completely and let the shaft rotate in the opposite direction, until the shaft stops. Remove the crank.
   • (a.) UNLOCK: To unlock the manual positioner, rotate the crank in the direction indicated by the arrow on the actuator by 20° to 30° and release.

IMPORTANT:

• Each time the actuator is powered up (for example, after a power loss) the manual positioner unlocks automatically.
• The automatic unlock may not operate properly if the actuator has been manually positioned at the opposite end stroke to the spring return position.

Figure 4: Mounting the actuator on the valve (VA78x0-xxx-11)
Ensure that the coupler is in the correct position. Otherwise, readjust it using the manual override. The stem on the valve must be fully extended. The end stroke cursors must be manually tight on the stroke indicator.

1. Position the coupler.
2. Extend the valve stem completely and manually tighten the lock nut.
3. Position the actuator on the valve bonnet and close the locking yoke.
4. Fix the actuator on the valve tighting screw.
5. Manually tighten the coupler until the end is holding the valve stem.
6. Manually tighten the lock nut counter-clockwise until the end.
7. Hold the coupler and tighten the lock nut.
   • (a). HOLD
   • (b). TIGHTEN
8. Manually position the end-stroke cursors against the indicator.

Figure 5 : Mounting the actuator on the valve (VA78x0-xxx-12)
Ensure that the coupler is in the correct position. Otherwise, readjust it using the manual override. The stem on the valve must be fully extended. The end stroke cursors must be manually tight on the stroke indicator.

1. Position the coupler.
2. Extend the valve stem completely and manually tighten the lock nut.
3. Position the actuator on the valve bonnet and close the locking yoke.
4. Fix the actuator on the valve tighting screw.
5. Half couplers
6. Half couplers in the correct mounting position
7. Manually position the end-stroke cursors against the indicator.

Wiring

WARNING: Risk of electric shock.
Disconnect the power supply before making electrical connections. More than one disconnect may be required to completely de-energize equipment. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death.

Figure 6: Wiring diagrams for VA78x0-GGx-xx

• (a). Wired as proportional voltage input – factory wiring
• (b). Wired as proportional current input
• (c). Wired as floating
• (d). Wired as open / close
• (e). For VA78x0-GGC-1x only

WARNING: The CMOS integrated circuits in the controller are sensitive to static electricity. Take suitable precautions.

Table 1: DIP switch settings

1

| ****

Control type

| OFF| Proportional control
ON| Floating control / open-close

2

| ****

Input signal

| OFF| Voltage input signal
ON| Current input signal

3

| ****

Input signal range

| OFF| Pre-defined setting
ON| Custom setting

4

| OFF| 0-10 V| 0-20 mA
ON| 2-10 V| 4-20 mA

5

| ****

Action

| OFF| Direct action
ON| Reverse action

6

| Pre-set actuator position at signal loss| OFF| Actuator stem retracted
ON| Actuator stem extended

7

| ****

Stroke speed

| OFF| 6 s/mm
ON| 3 s/mm
8| —| —

Self-calibration

Figure 7: Starting self-calibration

• (a.) Calibration button
• (b.) DIP switches
• (c.) Electronic board

The standard control signals are selected by setting DIP switches 2, 3, and 4, within the range: 0…10 VDC or 0…20 mA. Factory default parameters: 0…10 VDC.
(See Table 1: DIP switch settings).

IMPORTANT: Power must be connected before the self-calibration cycle can be started, and the actuator must be already mounted on the valve.

• To start self calibration cycle push and hold the button for at least 3 seconds. (See Figure 7 – a)
• During the procedure, the green LED blinks quickly.
• The actuator will make one full cycle to detect the stem extension and retraction limits.
• The end stroke cursors are automatically placed at the stroke limits.

Standard input signal
DIP switch 3 = OFF

• The green LED switches on steadily when the position is reached.
• If the control signal changes, the actuator stem moves to reach the new position. During the spindle movement, the green LED blinks.

Custom input signal
DIP switch 3 = ON – Max range 0-10 VDC or 0-20 mA
(See Table 1: DIP switch settings).

• The custom input signal limits must be applied during the self-calibration cycle.
• First, set the minimum input signal (start-point), within the range 0…6 VDC (0…12 mA) and confirm it by pressing the calibration button.
• The LED will illuminate, a steady green for 2 seconds, indicating correct entry. If the LED illuminates a steady yellow for 2 seconds, an incorrect setting is indicated and must be re-entered.
• Set the maximum input signal, within the range 3…10 VDC (6…20 mA) and confirm it by pressing the calibration button.
• The LED will illuminates a steady green for 2 seconds, indicating correct entry.

IMPORTANT: If the LED illuminates a steady yellow for 2 seconds, an incorrect setting is indicated and the procedure must be restarted.

• When the procedure is finished and the actuator returns to its operating mode, reaching the position corresponding to the input signal value, the LED will illuminate a steady green.
• If the control signal changes, the actuator stem will move to the new position. During the stem movement, the LED flashes green.

Normal operating mode

• The actuator position is indicated by the end stroke cursors on the yoke.
• When the actuator moves, the green LED blinks.
• When the actuator stops, the green LED switches on steadily.

Actuator status indication

The actuator microprocessor carries out a diagnostic when a failure is detected. The actuator status is indicated by the LED. When the microprocessor detects that the stem has come to an unexpected stop, it initiates a retry cycle. This is repeated three times and if unsuccessful the actuator status switches to fault mode, indicated by a blinking yellow LED.
If the problem is cleared during the retry cycles, the actuator will continue its normal function.
Table 2: LED indications

Status

| LED Color
---|---
Green| Yellow| Red
On| Power on – motor still| • Custom calibration value out of range

• Self-calibration rejected Valve stroke out of limit (<8 mm, >25 mm).

Motor still.

| Generic fault
Blinking| Motor running| • Temporary fault, possible valve sticking*

• Self-calibration rejected Valve stroke out of limit (<8 mm, >25 mm).

Motor running.

| High temperature**
Rapid Blinking| Calibrating| Input signal failure| —
Off| Power off

• If the sticking cause is removed, the actuator can be taken out of the temporary fault mode by pressing the calibration button for at least 5 seconds.
  ** The LED changes to green when the temperature returns to an acceptable temperature value.
  Table 3: Feedback output

Figure 8: Auxiliary switches setting
(a.) CAM for auxiliary switches
The auxiliary switches can be adjusted by means of the two cams.

WARNING: Ensure that auxiliary switches S1 and S2 are not connected to different voltages.
(S1 230 V and S2 24 V NO!, S1 230 V and S2 230 V OK!).

Safety Warnings

CAUTION: Risk of electric shock.
Disconnect the power supply before making electrical connections to avoid electric shock.
WARNING: To prevent from electrical shock or damage to equipment, the utmost care should be taken when the cover is removed (authorized personnel only) for adjustments or check out. In all other cases when the cover is removed, the power should be switched off.
IMPORTANT: Make all wiring connections in accordance with local, national, and regional regulations. Do not exceed the electrical ratings of the actuator.
CAUTION: Risk of property damage.
Do not apply power to the system before checking all wiring connections. Short circuited or improperly connected wires may result in permanent damage to the equipment.

• Do not repair or replace a damaged cable. Contact the nearest Johnson Controls commercial system wholesaler.
• Do not open the actuator, other than to access the auxiliary switches or feedback settings.

Check out procedure
Before leaving the installation, observe at least three complete operating cycles to be sure that all components are functioning correctly. If not, please contact your supplier.

Ordering codes

VG9000 valves

Technical specifications

Product| VA7820 – VA7830 Electric Valve Actuators Proportional models series
---|---
Thrust force| 225 lb (1000 N) Nominal
Power supply| 24 V~ (19 to 30 V~) 50/60 Hz, Class 2 supply
Power consumption| 11 VA
Ambient operating conditions| -5 °C to 55 °C

10% to 90% RH (non condensing)

Ambient storage conditions| -40 °C to 80 °C

5% to 95% RH (non condensing)

Feedback signal| 0 to 10 V, with input signal 0 to 10 V or 0 to 20 mA

2 to 10 V, with input signal 2 to 10 V or 4 to 20 mA

Electrical connections|
– Actuator (GGC)| 1.5 m UL 758 Type 20626 halogen-free cable with

0.85 mm² conductors and 7 mm ferrule ends

– Auxiliary switches

(GGC)

| 1.5 m UL 758 Type 20626 halogen-free cable with

0.85 mm² conductors and 7 mm ferrule ends

– Actuator (GGA)| 1.5 m Type 05Z1Z1-F halogen-free cable with

0.75 mm² conductors and 7 mm ferrule ends

Dimensions (H x W x D)| 244 mm x 116 mm x 212 mm
Housing material| Self-extinguishing to UL94-V0
Protection class| IP54 (IEC 60529)
Shipping weight| 3.3 kg
Compliance

| Johnson Controls, Inc., declares that this product is in compliance with the essential requirements and other relevant provisions of the EMC Directive and Low Voltage Directive.

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UNITED KINGDOM

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