4 IOM-A-ACV-984_684 2115
EDP# 1917098
© 2021 Watts
IOM-A-ACV-984_684 2115
EDP# 1917098
© 2021 Watts 5
STEP 7
Slowly open downstream isolation valve to establish flow through
the system.
STEP 8
With a demand for flow on the system, the valve can now be
adjusted for the proper flow rate. This requires a meter to read the
flow that the valve is providing.
STEP 9
While reading the meter register, adjust the Rate of Flow Control:
Turn the adjustment screw IN, clockwise, to increase the flow rate
regulated (See Figure 2A).
Turn the adjustment screw OUT, counterclockwise, to reduce or
lower the flow rate regulated (See Figure 2B).
Setting the Rate-of-Flow Control
STEP 10
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 valve opening is too slow, turn the adjustment screw OUT,
counterclockwise, increasing the rate of opening (See Figure 3B).
If valve opening is too quick, turn the adjustment screw IN, clock-
wise, decreasing the rate of opening (See Figure 3A).
STEP 11
De-energize the solenoid to check that the main valve closes.
STEP 12
Closing Speed Needle Valve Adjustment: The closing speed
needle valve regulates fluid pressure into the main valve cover
chamber, controlling the valve closing speed.
If valve closing is too slow, turn the adjustment screw OUT, coun-
terclockwise, increasing the rate of closing.
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).
Figure 4
Limit Switch in Closed Position
Counterclockwise to INCREASE
the rate of opening
Clockwise to DECREASE
rate of opening
3A
3B
Figure 3
Flow Control
Counterclockwise to REDUCE
Flow Rate Regulated
Clockwise to INCREASE
Flow Rate Regulated
2A
2B
Figure 2
CP14-1 Rate-of-Flow Control Pilot
