Johnson Controls VA-8122 Скачать руководство пользователя страница 5 | Manualshive

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Johnson Controls VA-8122 Скачать руководство пользователя страница 5

VA-8122 Proportional Valve Actuator Product/Technical Bulletin

5

Direction of Action

The actuator’s direction of action is selected with
Jumper W2. (See Figure 3.) The action of the actuator
can be reversed by moving Jumper W2 on the circuit
board. When Jumper W2 is in the DD position (factory
setting), a low control input signal will cause the
actuator lever arm to move to the highest position
(valve stem up). A high control input signal will cause
the actuator lever arm to move to the lowest position
(valve stem down). When Jumper W2 is in the
DU position, the lever arm will be low for a low control
input signal and high for a high control input signal.
(See Figure 7.)

DU Mode

DD Mode

Low Control
Input Signal

Stem
Down

Stem
Up

Signal Increase

High Control
Input Signal

Figure 7: DD/DU Direction

The DD mode will result in the Direct Acting (DA)
operation of a Push-Down-To-Open (PDTO) valve.

Auto Calibration

The VA-8122 is factory calibrated for a 5/16 in. valve
stroke. To compensate for minor variations in strokes,
use the Auto Calibration or AUTOCAL mode during the
calibration and installation of the actuator. This mode
allows the actuator to define the control input range
proportionally over the valve stroke stored in
nonvolatile memory (retains data when power is lost or
removed).

Note:

Once calibrated, it is not necessary to
recalibrate if a jumper is changed.

To activate the AUTOCAL mode, depress the
AUTOCAL pushbutton for approximately 3 seconds
until the LED turns off. The actuator drives to the
DU end-stop, then to the DD end-stop, and stores
these positions in nonvolatile memory. The actuator
will drive to the setpoint determined by the control
signal applied after going through AUTOCAL.

Note:

AUTOCAL mode only occurs when the
pushbutton is depressed. It does not occur
automatically when power is supplied to the
actuator.

LED

The VA-8122 has a green LED display to indicate the
actuator’s operating mode. (See Table 4.)

Table 4: Operating Display

LED Indication

Description

On Solid

Power is applied; actuator is at
setpoint or stalled (not driving).

Single
Blinking

Power is applied; actuator is
driving down or up.

Fast Single
Blinking

Insufficient supply voltage

Double
Blinking

Actuator is driving during the
Auto Calibration mode
(AUTOCAL pushbutton released).

Off

Power is not applied or Auto
Calibration mode is initiated
(AUTOCAL pushbutton
depressed for 3 seconds).

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Содержание VA-8122

Страница 1: ...r retrofits of VT Series Terminal Unit Valves with slotted stems and VB 5x39 Series Flare Valves Refer to the appropriate valve literature for more information Figure 1 VA 8122 1 Valve Actuator Features and Benefits q AUTOCAL Pushbutton Allows the actuator to define the control input range proportionally over the stroke q Simplified Setup and Adjustment Procedures Reduces installation costs q Sele...

Страница 2: ...late Drive Screw Jumpers W1 W5 AUTOCAL Pushbutton Spade Terminals 3 LED Circuit Board 24 COM VDC mA Stem Retainer Position Indicator Manual Adjustment Knob Figure 2 VA 8122 Components IMPORTANT There are no internal mechanical stops in the actuator Never drive the actuator unless it is installed on the proper valve body or the actuator may be damaged Dimensions See Figure 3 for actuator dimensions...

Страница 3: ...t adaptor nut making sure the yoke is flush with the surface of the nut Note If the valve stem is touching the coupler and preventing a flush contact use the manual adjustment knob shown in Figure 4 to reposition the coupler 5 Secure the actuator to the valve bonnet by tightening the hex head machine screw provided 6 Place the stem retainer and coupling clip over the valve stem so the lower shorte...

Страница 4: ...he input signal is determined by the position of Jumpers W3 W4 and W5 See Table 1 and Table 2 Table 1 Jumper Settings W5 W4 W3 W2 W1 Shown in Factory Default Settings DD Drive Down Drive Up DU 6 9 VDC Current Input mA VDC Voltage Input The 6 9 VDC position of Jumper W5 overrides Jumper W3 0 10 VDC 0 20 mA 2 10 VDC 4 20 mA 0 10 VDC 0 20 VDC Table 2 Available Input Control Signal vs Input Jumpers Co...

Страница 5: ...llation of the actuator This mode allows the actuator to define the control input range proportionally over the valve stroke stored in nonvolatile memory retains data when power is lost or removed Note Once calibrated it is not necessary to recalibrate if a jumper is changed To activate the AUTOCAL mode depress the AUTOCAL pushbutton for approximately 3 seconds until the LED turns off The actuator...

Страница 6: ...osition Terminal Block Controller Input Signal 24 VAC Supply VDC mA 24 VAC COM Common Figure 8 VA 8122 Wiring IMPORTANT Install all the quick connect terminals in the same direction to each other to prevent the terminals from shorting See Figure 9 Figure 9 Orientation of Terminals Input lines to the actuator must be wired correctly for the valve to move in the proper direction Refer to the specifi...

Страница 7: ...00 Series bronze valves The VA 8122 is also available for retrofitting VG7000 Series bronze valves VT Series Terminal Unit Valves with slotted stems and VB 5x39 Series Flare Valves Refer to the AV 8122 Series Proportional Control Actuated Valve Product Technical Bulletin FAN 977 or 1628 3 and the VG7000 Series Bronze Valves ANSI Class 250 PN16 Body Size 1 2 through 2 inch DN15 to DN50 Product Tech...

Страница 8: ... Valve Media Temperature Water 195 F 90 C maximum Steam Actuator is not rated for this application Dimensions H x W x D 4 5 x 5 0 x 2 5 in 114 x 127 x 64 mm Shipping Weight 1 6 lb 0 74 kg Agency Compliance UL 873 Recognized File E27734 Guide XAPX2 CSA C22 2 No 139 Certified File LR85083 Class 3221 02 The performance specifications are nominal and conform to acceptable industry standards For applic...

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