VE VVG Electronic Two-way Valves
Technical Instructions
Document Number 155-112P25
Rev. 3 August, 2002
Page 6
Siemens Industry, Inc.
Wiring,
Continued
•
All units that connect to terminals Y and U, together with the SQS65U, must
connect to the same G0.
•
When wiring the position output to AI terminations, connect terminal U to SIG and
terminal G0 to COM.
•
The factory-fitted link across terminals R and M can be removed only if a unit
connects between these terminals.
Start-Up
Remove the actuator cover and verify the selector plug is set for the desired flow
characteristic. See Figure 4
.
Position
Flow Characteristics
A-C
Equal Percentage (Factory Setting)
C-B
Linear
Equal Percentage
Linear
O
O
A
C
B
A
C
B
Figure 4. Selector Plug Setting for Flow Characteristic.
•
V = Volumetric flow 1 to
100%
Y
U
= 0 to 10 Vdc control
signal
Y
R
= 0 to 1000 ohm
resistance signal
Troubleshooting
•
Check wiring for appropriate connections (Figure 3).
•
Check selector plug for proper flow characteristic.
•
Check valve operation. Thread plastic valve cap (Figure 1) onto top of valve. Turn it
to adjust valve position.
Stem Packing
Figure 5. VVG Valve Construction.
Service
If either valve or actuator is inoperative, replace that unit.
WARNING:
To avoid personal injury, do
not
attempt to repair the valve.
