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Wiring Instructions

Tamper Switch

Series C200, C300, LFC300

Sizes 2½"–10"

Series 2000SS, 3000SS

Sizes 2½"–12"

IS-A-FireTamperSwitch

WARNING

!

Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information 

can result in death, serious personal injury, property 

damage, or damage to the equipment.
Keep this Manual for future reference.

Wiring the Tamper Switch

Tamper switches integrated on the OSY-TS model of Series 

C200, C300, LFC300, 2000SS, and 3000SS assemblies add 

protection against fire.
The supervisory tamper switch consists of two SPDT switches. 

The device is designed to send a signal when the valve is closed 

and when the switch is removed from the valve. In the neutral 

position, the switch indicates the valve is fully open. Closing 

the valve causes the switch rod to come out of the valve stem 

groove, activating the switch. Removing the device also acti-

vates the switch.
Connect the wires to a fire alarm control panel in accordance 

with the schematic diagram and the wiring notes on page 2.

Switch rod in valve stem groove

CAUTION

!

Before wiring supervisory switches in fire protection systems, 

refer to the following standards:
NFPA 13: Standard for the Installation of Sprinkler Systems
NFPA 25: Inspection, Testing, Maintenance of Water-based Fire 

Protection Systems
NFPA 70: National Electrical Code
NFPA 72: National Fire Alarm Code
CSA C22.1 NO.1 Canadian Electrical Code, Part 1, Safety 

Standard for Electrical Installations Section 32
CAN/ULC-S524, Standard for Installation of Fire Alarm Systems

WARNING

!

•  Metallic conduit required by NEC for proper grounding conduit 

joint must be sealed with a conductive sealant.

•  Install switch in accordance with National Electrical Code and/

or local ordinances.

•  Wiring methods shall be in accordance with CSA C22.1, 

Canadian Electrical Code, Part 1, Safety Standard for Electrical 

Installations, Section 32 and CAN/ULC-S524, Standard for 

Installation of Fire Alarm Systems Assure All Devices Are 

Properly Grounded.

OSY gate valve with integrated tamper switch

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