Johnson Controls VA7820-HG 2 Serie Mode D'emploi page 5

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
Green Yellow
On Power on - motor •
still of range
•
Valve stroke out of limit
(<0.315 in., >0.98 in.)
(<8 mm, >25 mm).
Motor still.
Blinking Motor running •
valve sticking*
•
Valve stroke out of limit
(<0.315 in., >0.98 in.)
(<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 to 10 V or 0 to 20 mA
2 to 10 V or 4 to 20 mA
Figure 7: 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.
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 to 10 V
2 to 10 V
IS_VA7820-HGx-2 / VA7830-HGx-2_P/N 14-88375-92 Rev. F_10 2022
Ordering codes
Code Description
VA7820-HGA-2 Spring Return Actuator Stem Retract, Proportional 24 V~
VA7820-HGC-2 Spring Return Actuator Stem Retract, Proportional 24 V~,
2 auxiliary switches
VA7830-HGA-2 Spring Return Actuator Stem Extend, Proportional 24 V~
VA7830-HGC-2 Spring Return Actuator Stem Extend, Proportional 24 V~,
2 auxiliary switches
Technical specifications
Product VA7820-HGx / VA7830-HGx-2
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
Auxiliary switch rating 230 V~ 1 A G.P. 3 A RES. 1/4 HP 6k cycles
Ambient operating 23 °F to 131 °F (-5 °C to 55 °C)
conditions 10% to 90% RH (non condensing)
Ambient storage -40 °F to 176 °F (-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
(all models) 0.85 mm² conductors and 7 mm ferrule ends
- Auxiliary switches 1.5 m UL 758 Type 20626 halogen-free cable with
(-xxC models) 0.85 mm² conductors and 7 mm ferrule ends
Dimensions 9.6 in. x 5.9 in. x 8.35 in.
(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 116.4 oz. (3.3 Kg)
Compliance UL 60730-1, UL 6070-2-14, Listed Type 1 Enclosure,
CAN/CSA 60730-1, CAN/CSA 6070-2-14, File
E194024 XABE, XABE7
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.