1. Remove and discard the two C-clips and roller from the actu-
ating lever.
2. Set the valve to its fully open position. Remove the OSY2
Supervisory Switch from the carton and adjust the position of
the retaining washers to provide sufficient bolt length for the
yoke thickness of the valve.
Position the switch on the valve with the bolts on the inside
(preferably) or outside of the yoke, depending on clearances.
Adjust the position of the OSY2 as far as possible from the
valve gland and in a location where the actuating lever con-
tacts the unthreaded section of the valve stem (if the valve
stem is already grooved, proceed directly to step 6).
3. When the switch is in position on the valve, slide the open end
of the clamping bar onto the bolts and under the retaining
washers. If necessary, adjust the length of the actuating lever
by loosening the screw on the cam, sliding the lever in or out,
as appropriate, and retightening the screw. The lever is prop-
erly adjusted when it clears the clamping bar. Tighten the nuts
by hand and slide the OSY2 until the second switch trip points
are found as the lever rests on the valve stem. This approxi-
mates the final position of the OSY2 after the valve stem is
grooved. Carefully check all clearances of the bolts, actuator,
mounting bracket, clamping bar, and OSY2 cover. Adjust the
position as necessary. If clearance is a problem, refer to the
Limited Clearance Valves (page 1) section of this manual.
4. Mark the point on the valve stem where the actuating lever
contacts the valve stem.
5. Remove the OSY2 by loosening the nuts and sliding the
clamping bar from beneath the washers. Remove the OSY2
from the valve and set it aside.
(a) Valves 11⁄2″in diameter and smaller only.
Use a
1⁄4″untapered round file to file a groove 3⁄32″deep
in the valve stem at the mark that was made in step 4. Be
sure to remove any burrs resulting from the filing to avoid
damaging the valve stem packing gland.
(b) Valves larger than 11⁄2″inches in diameter only. Use a
3⁄8″untapered round file to file a groove 1⁄8″deep in the
valve stem at the mark that was made in step 4. Be sure to
remove any burrs resulting from the filing to avoid damag-
ing the valve stem packing gland.
YOKE
GROOVE
CLAMPING BAR NOT SHOWN
THREADED VALVE
GLAND HEX NUT
OR BOLT
VALVE
STEM
GLAND
STEM HEX
Figure 3: 6. Mount the switch loosely with the actuating lever centered
in the groove. When the switch is in position on the valve,
slide the open end of the clamping bar onto the bolts and
under the washers, as indicated in Figure 2.
7. Ensure that the actuating lever does not hit the inside of the
cover or the clamping bar at any point in its travel. If it does,
adjust the length of the lever by loosening the screw, sliding
the lever in or out, as needed, and retightening the screw.
8. Adjust the supervisory switch position on the valve so that
both switches are depressed (COM to B circuit open) when
the actuating lever is in the groove with the valve in the full
open position. The COM to B circuit should close when the
valve is closed 1⁄5of its travel or 2 full turns of the handle,
whichever is less. The switch produces an audible “click”
when it closes. The switch closure can also be tested electri-
cally by using an ohmmeter to test for continuity between its
terminals.
9. Tighten the nuts securely with a wrench and check the
operation of the OSY2 as in step 8. If necessary, reposition
the OSY2 and test it again.
10. Wire the supervisory switch as shown in Figure 4.
11. Replace the OSY2 cover and tighten the tamper-resistant
cover screws with the special wrench provided. Store this
wrench in a secure location.
12. Test the operation of the OSY2 by closing the valve the 1⁄5of
its travel distance or two full turns, whichever is less. The
circuit between COM and B should indicate a closure during
this procedure. If it does not, readjust the supervisory switch
and actuator positions until the switch closes when the valve
is operated.
Testing
Test the operation of all supervisory switches before they are
placed into service and at least semiannually, or as required by
the authority having jurisdiction.
NOTE: Notify the proper authorities that the supervisory
switch(es) is (are) undergoing maintenance and, there-
fore, will be temporarily out of service. Disable the
system or zone undergoing testing to prevent unwanted
alarms.
Test the operation of the OSY2 by closing the valve the 1⁄5of its
total travel distance or two full turns, whichever is less. A contact
closure must occur during this procedure. If it does not, readjust
the supervisory switch and actuator positions until the switch
closes when the valve operated.
W0209-00
3 I56-0393-J
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