Page 3 of 6 (Section 1 of 2)Form No.V8714 - Sec. 1
50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
Overtravel Proof-of-Closure Switch
The optional valve overtravel proof-of-closure switch is set at
the factory to provide both a mechanical and electrical means
of proving valve closed position interlock to the primary
control. This switch is not to be field adjusted.
Auxiliary and Overtravel Proof-of-Closure
Switch Combinations (Partial Views)
Optional
Left side Right side
Two Auxiliary Switches
AuxiliaryOvertravel proof-of-closure
Left side Right side
Two Auxiliary and One Proof-of-Closure Switch
Auxiliary switches
Overtravel Proof-of-Closure & Auxiliary Switches
Overtravel proof-of-closure
Auxiliary Switch Adjustment (Refer to Figure 4)
1. Remove window screws(4) and window with gasket.
2. Loosen the camlock screw no more than 1/2 turn.
3. Reset the cam adjustment screw to the desired switching
point and hold this screw until camlock screw is tightened.
4. Tighten the camlock screw. Cycle the actuator to verify
the switch setting and readjust as required.
5. Reinstall the window with gasket and torque screws
evenly to 14 to 16 in-lbs [1,6 to 1,8 Nm].
Figure 4. Auxiliary Switch Adjustment.
Cam adjustment screw
Cam lock screw
Window gasket
Window
Window screw (4)
Partial Side View of
Actuator
MAINTENANCE
Maintenance should include annual inspection and cleaning.
Use a cleaning fluid compatible with actuator components to
remove dirt and oil. Organize a maintenance schedule based
on environment and frequency of use. Check for loose
electrical and mechanical connections and replace damaged
parts. Before inspection, maintenance or rebuild, review
WARNING statements on page 1.
Field Service Notice
Field service replacement kits are limited to the following:
1. Travel limit switch Replacement Kit 440014.
2. Left side auxiliary switch Replacement Kit 440002.
3. Right side auxiliary switch Replacement Kit 440003.
4. Overtravel proof-of-closure switch Replacement Kit
440004*.
5. Right side combination auxiliary and overtravel
proof-of-closure switch Replacement Kit 440012*.
6. Damper arm Replacement Kit 440018 (with spring and
spring plug) or 440019 (without spring and spring plug).
7. Oil Replacement Kit 440008.
8. All gaskets and screws for enclosure Replacement Kit
440020. This kit contains the following:
Nameplate/electrical cover gasket and screws
Right & left window gasket and screws.
Valve/actuator mounting gasket and mounting set
screws.
To order, specify the kit or part number, as well as the actuator
model and serial numbers.
*Separate instructions provided with replacement kit.
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