Price Antec Controls VENTURI VV Series Manual page 25

Field Adjustment
STEP 1
Ensure that the VPS is being calibrated at a temperature as close to the actual operating temperature as possible.
STEP 2
The set point range adjusting screw is located on the underside of the switch. To get access to the adjusting screw, unmount the VPS from the valve
by removing the screws on both mounting feet.
STEP 3
To determine the number of turns required to reach the new set point, perform the following calculation:
If the number of turns is a positive value, the adjusting screw will need to be turned clockwise.
If the number of turns is a negative value, the adjusting screw will need to be turned counterclockwise.
NOTES:
1. Turning the adjusting screw clockwise will increase the setpoint and turning the adjusting screw counterclockwise will decrease the setpoint.
2. Each full turn represents approximately 0.18 in.w.c.
3. The maximum set point value is 1.0 in.w.c., do not exceed this value.
STEP 4
Insert a 1/16 inch hex wrench into the adjusting screw. Holding the VPS so that the diaphragm is vertical, turn the adjusting screw the direction and
number of turns determined from the calculation in the previous step.
A digital manometer and multi-meter can be used to achieve precise set point calibration.
STEP 5
Use a digital manometer and multi-meter to confirm that the new set point was achieved.
23 | VV – Manual | AntecControls.com
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