Safe Signal OSY2 User manual

OSY2 Gate Valve
Supervisory Switch
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Important
Please Read Carefully And Save
This instruction manual contains important information
on the installation and operation of supervisory switches.
Purchasers who install supervisory switches for use by oth-
ers must leave this manual or a copy of it with the user.
These instructions apply to Safe Signal switches for out-
side screw and yoke valves only. Read all instructions
carefully before beginning installation.
WARNING
Do NOT use this switch in explosive or potentially explosive
atmospheres.
Do NOT leave unused wires exposed.
All supervisory switch installations must comply with local codes
and ordinances and the requirements of the authority having
jurisdiction. Additional information is available in National Fire
Protection Association standards NFPA 13, 13D, 13R, 71, and 72.
General Installation Considerations
The OSY2 Supervisory Switch can be mounted on open yoke
valves between 1⁄2″and 12″in diameter in the positions shown
in Figure 1 only. If the switch is installed with the actuator
pointing upward, water may leak into the interior of the switch.
Therefore, do NOT install the OSY2 with its actuating lever
pointing upward.
All OSY2 models are equipped with a ground screw inside the
switch housing near the conduit exit hole for those applications
where grounding is required.
Specifications
Contact Ratings: 10 A @ 125/250 VAC
2.5 A @ 24 VDC
Dimensions: 53⁄4″H X 31⁄2″W X 31⁄4″L
Maximum Stem Extension: 25⁄8″
Minimum Stem Extension: 5⁄8″
Bracket Span: 63⁄4″
Operating Temperature Range: 32° – 120°F (0°C – 49°C)
Shipping Weight: 23⁄4lb.
Enclosure Rating: NEMA Type 3R when mounted with the actuator vertical (cover on top) as tested by
Underwriters Laboratories, Inc.
IP54
U.S. Patent Number: 5,213,205
Narrow Yoke Valves
As Figure 2 suggests, installing the valve with mounting bolts
inside the yoke is recommended. However, some valves may have
yokes that are too narrow for this arrangement. If this is the case,
the bolts can be positioned on the outside of the yoke.
Limited Clearance Valves
The OSY2 mounting bracket fits most of the open yoke valves
used in fire protection systems. However, some of these valves,
especially those less than 11⁄2″in diameter, have irregularly
shaped yokes or such limited clearances that the clamping bar
cannot be installed properly and/or it causes the valve to bind. If
this is the case, the use of J-bolts is required to attach the OSY2
to the valve (see J-Bolt Detail, Figure 2). J-bolts can be purchased
separately by ordering the OSYRK Replacement Kit.
Installation Instructions
See Figures 2 and 3, as required, while performing the procedure
that follows.
Perform step 1 on valves 11⁄2″in diameter and smaller only.
Proceed directly to step 2 if the switch is being installed on a
valve larger than 11⁄2″in diameter.
Figure 1:
THE FOLLOWING ARE EXAMPLES OF
ACCEPTABLE MOUNTING POSITIONS:
THE FOLLOWING MOUNTING
POSITION IS NOT ACCEPTABLE:
ACTUATOR
VERTICAL (DOWN)
ACTUATOR
HORIZONTAL
ACTUATOR VERTICAL
(POINTING UP)
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Figure 2:
J-Bolt Detail
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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.
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1. Alarms generated by the actuation of the activating lever may
not be received by a central station if telephone or other com-
munication lines to the detector are out of service, disabled,
or open.
2. Supervisory switch alarm devices have a normal service life of
10-15 years.
WARNING
The Limitations of Supervisory Switch Alarm Devices
3. Supervisory switches are not a substitute for insurance.
Building owners should always insure property and lives
being protected.
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Figure 4. Supervisory switch wiring diagram:
TOP VIEW
SWITCH
1
COM
COM
ABBA
SWITCH 2
CONTACT RATINGS
125/250 VAC
24 VDC
10 AMPS
2.5 AMPS
SUP. SWITCH
BB
COM COM
SUP. SWITCH
BB
COM COM
TYPICAL FACP CONNECTION
TO NONSILENCEABLE
INITIATING ZONE
OF LISTED FACP
END-OF-LINE
RESISTOR
B
COM
TO POWER
SOURCE
COMPATIBLE
WITH BELL
LOCAL
BELL
TYPICAL LOCAL BELL CONNECTION
BREAK WIRE AS SHOWN FOR SUPERVISION
OF CONNECTION. DO NOT ALLOW STRIPPED
WIRE LEADS TO EXTEND BEYOND SWITCH
HOUSING. DO NOT LOOP WIRES.
STRIP GAUGE
NOTE: COMMON AND B CONNECTIONS
WILL CLOSE WHEN VALVE MOVES 1/5OF
ITS TOTAL TRAVEL DISTANCE.
WARNING: High Voltage. Electrocution Hazard. Do not handle live AC wiring or work on a device to which AC power is
applied. Doing so may result in severe injury or death.
When utilizing switches at voltages greater than 74 VDC or 49 VAC , means to provide all-pole disocnnec-
tion must be incorporated in the field wiring, such as a circuit breaker.
THREE-YEAR LIMITED WARRANTY
SAFE SIGNAL warrants that the equipment herein shall conform to said descriptions as to all af-
firmation of fact and shall be free from defects of manufacture, labeling, and packaging for a pe-
riod of three (3) years from the invoice date to the original purchaser, provided that representative
samples are returned to SAFE SIGNAL for inspection. Upon a determination by SAFE SIGNAL
that a product is not as warranted, SAFE SIGNAL shall, at its exclusive option, replace or repair
said defective product or parts thereof at its own expense except that Purchaser shall pay all
shipping, insurance, and similar charges incurred in connection with the replacement of the
defective product or parts thereof. This Warranty is void in the case of abuse, misuse, abnormal
usage, faulty installation, or repair by unauthorized persons, or if for any other reason SAFE
SIGNAL determines that said product is not operating properly as a result of causes other than
defective manufacture, labeling, or packaging.
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