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: 5
3
⁄
4
″
H X 3
1
⁄
2
″
W X 3
1
⁄
4
″
L
Maximum Stem Extension:
2
5
⁄
8
″
Minimum Stem Extension:
5
⁄
8
″
Bracket Span:
6
3
⁄
4
″
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 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 1
1
⁄
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 1
1
⁄
2
″
in diameter and smaller only.
Proceed directly to step 2 if the switch is being installed on a
valve larger than 1
1
⁄
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)
W0221-00
I56-0393-J
1
I56-0393-J
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