ES-A-ACV-LF980GD-16 2115
STEP 5
Opening Speed Needle Valve Adjustment: While free flow goes
into the lower chamber, the Opening speed flow control restricts
flow out of the upper chamber of the main valve.
If valve opening is too slow, turn the adjustment screw OUT,
counterclockwise, increasing the rate of opening.
If valve opening is too quick, turn the adjustment screw IN, clock-
wise, decreasing the rate of opening.
STEP 6
When pump demand is satisfied, pump will continue to operate
as the main valve closes. To close main valve, de-energize the
solenoid, checking that the main valve closes.
16
© 2021 Watts
Installation, Operation and Maintenance - Series LF980GD-16
Commissioning the Pump Control Valve
STEP 1
NOTE:
System needs to be filled, pressurized, and ready for flow. Due to an internal system check feature, Automatic Control Valve will
not flow until pump starts.
Pre-set pilots as noted:
Opening and Closing Speed
– Prior to pump start, actuate manual operator on solenoid to enable diaphragm assembly to stroke
open and closed. Observing the limit switch stem indicator, monitor rate of opening and closing speed. Adjust accordingly per applica-
tion requirements.
NOTE:
Cycle diaphragm multiple times to confirm rate of movement and remove excess air trapped within the cover chambers (See
Figure 1 Below).
To increase the rate of opening/closing, turn the adjustment
screws on the speed controls OUT, counterclockwise (See Figure
2B Following Page). To decrease the rate of opening/closing, turn
the adjustment screws on the speed controls IN, clockwise (See
2A Following Page).
STEP 2
Prior to pump start, energize the solenoid to confirm connection
to power source.
STEP 3
De-energize the solenoid prior to initial pump start.
STEP 4
Energize the solenoid at pump start to open the main valve,
checking that the main valve opens.
Figure 1
4-Way Solenoid
Manual
Operation
Normal
Operation
