ES-A-ACV-LF981GD 2115
STEP 9
Opening Speed Flow Control Adjustment:
The Opening speed
flow control allows free flow into the cover and restricted flow out
of the cover of the main valve.
If the downstream pressure fluctuates slightly below the desired
set point, turn the adjustment screw OUT, counterclockwise,
increasing the rate of opening (See Figure 3B).
STEP 10
Closing Speed Valve Adjustment: The closing speed needle valve
regulates fluid pressure into the main valve cover chamber, con-
trolling the valve closing speed.
If the downstream pressure fluctuates slightly above the desired
set point, turn the adjustment screw OUT, counterclockwise,
increasing the rate of closing.
STEP 11
De-energize solenoid to check that the main valve closes.
STEP 12
At valve closure booster pump will stop. Adjust limit switch collar
to final position to ensure positive actuation of limit switch elec-
trical contact, if necessary, by sliding up/down to location (See
Figure 4).
19
Counterclockwise to INCREASE
the rate of opening
Clockwise to DECREASE
rate of opening
3A
3B
Figure 3
Flow Control
© 2021 Watts
Installation, Operation and Maintenance - Series LF981GD
Figure 4
Limit Switch in Closed Position
