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IS_VA7820-VA7830_P/N 14-88375-25 Rev. A_06 2009
READ THIS INSTRUCTION SHEET AND THE SAFETY WARNINGS CAREFULLY
BEFORE INSTALLING AND SAVE IT FOR FUTURE USE
General Features
VA7810-xxx-1x model can be mounted on VG7000T valves:
• DN25...50 if brass trim;
• DN15...50 if stainless steel trim.
VA7810-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
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.
Figure 3: Manual Positioner
(1).
MOVE: Insert the crank (under the actuator) into the hexagonal hole
in the located on top of the actuator. Turn in the direction indicated by
the arrow, to move the splindle 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 than
before, 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 about 20-30
degrees and release it.
Figure 4: Mounting Actuator on the valve (mod. VA78x0-GGx-11)
Ensure that coupler is in the correct position, otherwise readjust it by means of the
manual override. The stem on the valve has to be completely up. The end stroke
cursors have to be manually tight on the stroke indicator.
(1).
Coupler correct position.
(2).
Extend completely the valve stem and screw manually the lock nut.
(3).
Position actuator on valve bonnet and close yoke locking.
(4).
Fix actuator on valve tighting screw.
(5).
Screw manually the coupler till the end holding the valve stem.
(6).
Screw manually the lock nut counter clockwise until the end.
(7).
Hold the coupler and tighten the lock nut.
(a).
HOLD
(b).
TIGHTEN
(8).
Move manually the end-stroke cursors against the indicator.
Figure 5: Mounting Actuator on the valve (mod. VA78x0-GGx-12)
Ensure that coupler is in the correct position, otherwise readjust it by means of the
manual override. The stem on the valve has to be completely up. The end stroke
cursors have to be manually tight on the stroke indicator.
(1).
Coupler correct position.
(2).
Extend completely the valve stem and screw manually the lock nut.
(3).
Position actuator on valve bonnet and close yoke locking.
(4).
Fix actuator on valve tighting screw.
(5).
Half couplers.
(6).
Half couplers correct mounting.
(7).
Move manually the end-stroke cursors against the indicator.
Wiring
Figure 6: Wiring diagram VA78x0-GGx-1x
(a).
Wired as Proportional
(b).
Wired as Floating
(c).
Wired as ON-OFF
(d).
For VA70x0-GGC-xx only
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…20mA. Factory default parameters: 0...10 VDC.
(See Table 1 “DIP Switch Setting”)
.
• To start self calibration cycle push and hold the button for at least 3 seconds
(See Figure 7-
a.
)
.
• During the procedure
green LED is fast blinking.
• The actuator will make one full cycle to detect the stem extended and retracted
limits.
• The end stroke cursors are automatically placed at the stroke limits.
Standard input signal
DIP SWITCH 3 = OFF
• The green LED switches on steady 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 setting”).
• 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.
• LED illuminates a steady green for 2 sec. indicating correct entry.
If the LED illuminates a steady yellow for 2 sec., 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.
• LED illuminates a steady green for 2 sec. indicating correct entry.
• When the procedure is finished 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 steady.
IMPORTANT:
It is recommended to set the actuator to the desired control signal and
action before fitting to the valve.
(See figure 6 “Wiring diagram” and Table 1 “DIP Switch Setting”).
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 models), 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.
IMPORTANT:
• Each time the actuator is powered up (e.g. after a power black-out) the manual
positioner unlocks
automatically.
• The automatic unlock
could not operate
properly if the actuator has been
manually positioned at the opposite end stroke than the spring return position.
WARNING: The CMOS integrated circuits in the controller are
sensitive to static electricity. Take suitable precautions.
Table 1: DIP Switch Setting
DIP Switch
number
Description
State
1
Control Type
OFF
Proportional control
ON
Floating control/ON-OFF
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
NOT USED
NOT USED
IMPORTANT:
Power must be connected before the self-calibration cycle can be
started and the actuator has to be already mounted on the valve.
IMPORTANT:
If the LED illuminates a steady yellow for 2 sec., an incorrect setting is
indicated and the whole procedure must be restarted.
