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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
Green
Yellow
On
Power on - motor
•
still
of range
•
Valve stroke out of limit
(<8 mm, >25 mm).
Motor still.
Blinking
Motor running
•
valve sticking*
•
Valve stroke out of limit
(<8 mm, >25 mm).
Motor running.
Rapid
Calibrating
Input signal failure
Blinking
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
Input signal
0...10 V or 0...20 mA
2...10 V or 4...20 mA
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
Code
Description
VA78x0-GGA-11
Proportional 24 V~, VG7000T valves
VA78x0-GGA-12
Proportional 24 V~, VGS8xxx / VG8000 / VG9000 valves
VA78x0-GGC-11
Proportional 24 V~, 2 auxiliary contacts, VG7000T valves
VA78x0-GGC-12
Proportional 24 V~, 2 auxiliary contacts, VGS8xxx / VG8000 /
VG9000 valves
LED Color
Red
Custom calibration value out
Generic fault
Self-calibration rejected
Temporary fault, possible
High temperature**
Self-calibration rejected
—
Power off
Feedback output
0...10 V
2...10 V
IS_VA7820-VA7830_P/N 14-88375-25 Rev. D_10 2022
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
-5 °C to 55 °C
conditions
10% to 90% RH (non condensing)
Ambient storage
-40 °C to 80 °C
conditions
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
1.5 m UL 758 Type 20626 halogen-free cable with
(GGC)
0.85 mm² conductors and 7 mm ferrule ends
- Auxiliary switches
1.5 m UL 758 Type 20626 halogen-free cable with
(GGC)
0.85 mm² conductors and 7 mm ferrule ends
- Actuator
1.5 m Type 05Z1Z1-F halogen-free cable with
(GGA)
0.75 mm² conductors and 7 mm ferrule ends
Dimensions
244 mm x 116 mm x 212 mm
(H x W x D)
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.
This document is subject to change without notice.
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