System Sensor OSY2 - Manual

N770-04-00 1 I56-0393-008R
OSY2 Gate Valve
Supervisory Switch
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
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
outside 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 author-
ity 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
ʺ and 12ʺ 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
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: 5
3 ⁄
4
ʺH X 3 1 ⁄
2
ʺW X 3 1 ⁄
4
ʺL
Maximum Stem Extension: 2 5 ⁄
8 ʺ
Minimum Stem Extension: 5 ⁄
8 ʺ
Bracket Span: 6 3 ⁄
4
ʺ
Operating Temperature Range: 32° – 120°F (0°C – 49°C)
Shipping Weight: 2
3 ⁄
4
lb.
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 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 1
1 ⁄
2 ʺ 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 pro-
cedure that follows.
Perform step 1 on valves 1
1 ⁄
2
ʺ in diameter and smaller
only. Proceed directly to step 2 if the switch is being
installed on a valve larger than 1
1 ⁄
2 ʺ in diameter.
Figure 1:
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