System Sensor OSY2 User manual

N770-04-00 1 I56-393-06
OSY2 Gate Valve
Supervisory Switch
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
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 System Sensor 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 explo-
sive 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 posi-
tions shown in Figure 1 only. If the switch is installed with
the actuator pointing upward, water may leak into the inte-
rior 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 ap-
plications 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.
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 arrange-
ment. 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 the
supplied J-bolts is required to attach the OSY2 to the valve
(see J-Bolt Detail, Figure 2).
Installation Instructions
See Figures 2 and 3, as required, while performing the pro-
cedure that follows.
Perform step 1 on valves 11/2" in diameter and smaller
only. Proceed directly to step 2 if the switch is being in-
stalled on a valve larger than 11/2" in diameter.
Figure 1:
ACTUATOR
VERTICAL ACTUATOR HORIZONTAL
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N770-04-00 2 I56-393-06
Mounting Bracket
"C" clip
Actuating lever
set screw
Actuating Cam Spring
Mounting screws
Terminal block
Base housing
Actuating lever roller
Cover
Tamper-resistant
screws
Wrench for
tamper-resistant
screws
(P/N WFDW)
Hex wrench
(P/N HEXW)
Nut
Retaining Washer
Carriage Bolt
Clamping Bar
Yoke
Valve Stem
(2 thru 12"only)
NOTE:
LARGER GATE VALVE SHOWN (2" THRU 12"). WHEN INSTALLING
SUPERVISORY SWITCH TO SMALLER GATE VALVES (1/2" THRU 1 1/2")
CARRIAGE BOLTS ARE TO BE LOCATED ON OUTBOARD SIDE OF YOKE.
ON SMALL VALVES WITH LIMITED CLEARANCE THE USE OF J-BOLTS
MAY BE REQUIRED.
Seal
SLIDE CLAMPING
BAR TO REMOVE
OR INSTALL.
Figure 2:
J-Bolt Detail
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N770-04-00 3 I56-393-06
1. Remove and discard the two C-clips and roller from the
actuating lever.
2. Set the valve to its fully open position. Remove the OSY2
Supervisory Switch from the carton and adjust the posi-
tion 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 clear-
ances. Adjust the position of the OSY2 as far as possible
from the valve gland and in a location where the actuat-
ing lever contacts the unthreaded section of the valve
stem (if the valve stem is already grooved, proceed di-
rectly 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 set screw on the
cam, sliding the lever in or out, as appropriate, and re-
tightening the set screw. The lever is properly 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 approximates 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 le-
ver contacts the valve stem.
5. Remove the OSY2 by loosening the nuts and sliding the
clamping bar from beneath the retaining washers. Re-
move 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
YOKE
GROOVE
CLAMPING BAR NOT SHOWN
THREADED VALVE
GLAND HEX NUT
OR BOLT
VALVE
STEM
GLAND
STEM HEX
Figure 3: filing to avoid damaging the valve stem packing
gland.
6. Mount the switch loosely with the actuating lever cen-
tered 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 retaining 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 loos-
ening the set screw, sliding the lever in or out, as
needed, and retightening the set 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 electrically 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, reposi-
tion 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 re-
quired by the authority having jurisdiction.
NOTE: Notify the proper authorities that the supervisory
switch(es) is (are) undergoing maintenance and,
therefore, will be temporarily out of service. Dis-
able the system or zone undergoing testing to pre-
vent unwanted alarms.
Test the operation of the OSY2 by closing the valve the 1/5
of 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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N770-04-00 4 I56-393-06
©System Sensor 1999
Three-Year Limited Warranty
System Sensor warrants its enclosed supervisory switch to be free from
defects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this supervisory switch. No agent, representa-
tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company’s obli-
gation of this Warranty shall be limited to the repair or replacement of any
part of the supervisory switch which is found to be defective in materials
or workmanship under normal use and service during the three year pe-
riod commencing with the date of manufacture. After phoning System
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authori-
zation number, send defective units postage prepaid to: System Sensor,
Repair Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL
60174. Please include a note describing the malfunction and suspected
cause of failure. The Company shall not be obligated to repair or replace
units which are found to be defective because of damage, unreasonable
use, modifications, or alterations occurring after the date of manufacture.
In no case shall the Company be liable for any consequential or incidental
damages for breach of this or any other Warranty, expressed or implied
whatsoever, even if the loss or damage is caused by the Company’s negli-
gence or fault. Some states do not allow the exclusion or limitation of inci-
dental or consequential damages, so the above limitation or exclusion may
not apply to you. This Warranty gives you specific legal rights, and you
may also have other rights which vary from state to state.
1. Alarms generated by the actuation of the activating lever
may not be received by a central station if telephone or
other communication lines to the detector are out of ser-
vice, 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.
A78-1639-00
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
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