Watts F1115-74 - Manual (Page 6)

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
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F115-74 (Globe)
F1115-74 (Angle)
Proper Automatic Control Valve start-up requires bringing the valve into service in a controlled manner. All
adjustments to control pilots and speed controls should be made slowly, allowing the valve to respond and the
system to stabilize. NOTE: Control Valves should be set-up in a dynamic (flowing) condition for proper start-up.
Provisions for flow must be made to insure proper settings.
For proper operation, the Low Flow By-Pass is set 10 PSI higher than the Main Pressure Reducing •
Valve.
Close upstream and downstream valves to isolate the valve from line pressure. Release spring tension on 1.
Pressure Reducing Control and Low Flow By-Pass by turning adjustment screws out (counterclockwise),
decreasing setpoints. Open all Isolation Ball Valves, if so equipped. If valve is fitted with adjustable speed
controls, turn needle(s) in (clockwise) until seated, and return out (counterclockwise) 1-1/2 to 2-1/2 turns.
These are approximate settings, and should be fine tuned to suit system requirements after pressure
adjustments have been made.
Slowly open upstream isolation valve to allow controlled filling of the valve. Vent entrapped air by carefully 2.
loosening control tubing or pipe plug at the highest point possible. If valve is equipped with a Position
Indicator, open Air Bleed Petcock to vent air. Water will be milky in appearance and will begin to clear as
air is vented. Carefully loosen enough cover screws on control pilot(s) to vent entrapped air. Re-tighten
when water vents clearly.
Setting Reducing Control: Slowly open downstream isolation valve. Gradually turn adjustment screw on 3.
the Pressure Reducing Control in (clockwise) to raise downstream pressure. Allow valve and system to
stabilize. Observe inlet and outlet pressure gauges. Continue to adjust as needed, pausing approximately
every 1-1/2 turns, allowing valve and system to stabilize. Turning adjustment screw clockwise raises outlet
pressure. Turning adjustment screw counterclockwise lowers outlet pressure. Set Pressure Reducing
Control approximately 10 PSI lower than desired downstream pressure. Tighten locknut on Reducing
Pilot.
Fine tune Speed Controls to suit system requirements. Adjust Closing Speed Control (if equipped) 4.
clockwise for slower closure, and counterclockwise for faster closure. Adjust Opening Speed Control (if
equipped) clockwise for slower opening, and counterclockwise for faster opening.
Setting Low Flow By-Pass: Gradually turn adjustment screw on Low Flow By-Pass in (clockwise) to raise 5.
downstream pressure. Observe outlet pressure gauge. Continue to adjust Low Flow By-Pass, pausing
approximately every 1-1/2 turns, allowing valve and system to stabilize, until desired downstream pressure
is reached. Low Flow By-Pass is now set approximately 10 PSI higher than the Main Pressure Reducing
Valve, and will handle low flow requirements. Tighten locknut on Low Flow By-Pass Pilot.
Installations
Start-Up
Prior to installation, flush line to remove debris. •
Install valve horizontally “in line” (cover facing UP), so flow arrow matches flow through the line. • Avoid install-
ing valves 6” and larger vertically. Consult factory prior to ordering if installation is other than described.
Install inlet and outlet isolation valves. • NOTE: When using butterfly valves, insure disc does not contact control
valve. Damage or improper valve seating may occur.
Provide adequate clearance for valve servicing and maintenance. •
Install pressure gauges to monitor valve inlet and outlet pressure. •
If installation is subjected to very low flow or potentially static conditions, it is recommended a pressure relief •
valve (1/2” minimum) be installed downstream of the Pressure Reducing Valve for additional system protec-
tion.
910 Ops & Inst