User Guide

F-27087-6 Copyright 2010 Schneider Electric All Rights Reserved. 9
Manual Valve Positioning of Mx40-704x Spring Return Actuators
Before applying power to a ball valve assembly on a new installation, it may be desired to
manually open the valve for system filling at startup. Manually open the ball valve assembly
according to Figure-7 (current-style bracket) or Figure-7 (old-style bracket).
4 To restore normal operation:
a. Rotate the valve shaft back to its original
spring return position.
b. Using a 10 mm wrench or socket, evenly
tighten the two nuts on the shaft clamp,
applying 8 to 10 lb-ft (11 to 14 N-m) of torque.
c. Restore power to the actuator.
2 Loosen the two nuts on the shaft
clamp, using a 10 mm wrench or
socket.
1 Disconnect power
from the actuator.
1
1
Alternate Method
If the actuator is not yet wired:
a. Loosen the wing nut on the underside of the mounting plate, then
slide the anti-rotation clip out of the slot on the bottom of the actuator.
b. Turn the actuator to the desired position.
c. To restore normal operation, rotate the actuator back into alignment
with the mounting plate, then slide the anti-rotation clip half way into
the slot on the bottom of the actuator. Tighten the wing nut to secure
the anti-rotation clip, being careful not to over-tighten it.
2-Way 3-Way Mixing
Flats on Sides
of Shaft
Open
(Fully CCW)
Outlet
Inlet
Closed
(Fully CW)
Outlet
Inlet
A Full Open to AB
(Fully CCW)
AB
A
B Full Open to AB
(Fully CW)
AB
A
1 The flats on the sides of the shaft
indicate the position of the ball port.
3 Using a 10 mm open-end wrench or
adjustable wrench (crescent wrench),
rotate the shaft to the desired position.
Figure-6 Manually Opening Valve Assemblies Equipped with Mx40-704x Series Actuators.