User's Manual

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Effective: March 2013

K-73-06

LHS

™

Linear Heat Sensor

FEATURES

• Fixed Temperature Digital Heat Detector

• Five Alarm Temperatures Available: 142°F - 158°F,

180 °F, 220°F, 350°F, 452°F

• Compatible with All Fire Control Panels

• Connect Directly to Initiating Circuit

• Cost-Effective Solution for Hazardous Locations

• Ideal for Use in Applications Where Spot-Type

Heat Detectors are Unsuitable

• Fire Zone Location Using LHS with

SmartOne®-compatible panels

• FM Approved

DESCRIPTION

The LHS™ Linear Heat Sensor cable is a flexible, dura-

ble and cost-effective fixed-temperature fire detector,

suitable for protecting a wide range of commercial and

industrial fire applications.

LHS is a small diameter cable capable of detecting heat

from a fire over its entire length. The sensor cable con-

sists of a twisted pair of 19 AWG copper coated steel

conductors covered by a temperature sensitive insula-

tion, and protected by either a plastic braid or jacket for

various environmental applications.

The LHS Linear Heat Sensor is Factory Mutual Approved

and is designed for open area as well as proximity detec-

tion. A wide range of jackets and operating temperatures

are available for proper system design, including con-

fined areas or harsh environments which prohibit the use

of other forms of detection. LHS is compatible with any

fire control panel that is capable of accepting contact clo-

sure type initiating devices.

APPLICATIONS

• Open Area Protection

• Belt Conveyers

• Tunnels

• Aircraft Hangars

• Cable Trays

• Floating Roof Tanks

• Classified Hazardous Areas (when used with intrinsic

safety barriers)

OPERATION

The heat from a fire causes the LHS cable’s special insu-

lation to melt at a specific temperature, allowing the two

conductors to short together, thus creating an alarm con-

dition on the fire control panel. The LHS cable may also

be used as a stand-alone contact device. The LHS nor-

mal operating state is an open circuit. For installation

details refer to “LHS Installation Instructions” (73-202).

Jacket

Thermoplastic strip

braid, PVC, nylon, or

fluoropolymer

Insulation

Temperature-sensitive

thermoplastic or

fluoropolymer

Conductor

Tinned

copper-covered

steel

Summary of content (2 pages)

PAGE 1
LHS™ Linear Heat Sensor Effective: March 2013 K-73-06 FEATURES • • • • • Fixed Temperature Digital Heat Detector Five Alarm Temperatures Available: 142°F - 158°F, 180 °F, 220°F, 350°F, 452°F Compatible with All Fire Control Panels Connect Directly to Initiating Circuit Cost-Effective Solution for Hazardous Locations • • • Ideal for Use in Applications Where Spot-Type Heat Detectors are Unsuitable Fire Zone Location Using LHS with SmartOne®-compatible panels FM Approved DESCRIPTION The LHS™ Linear Heat
PAGE 2
FIRE ZONE LOCATION WITH LHS An Intelligent Linear Heat Detection System is recommended for applications where fire zone location requires zone output control for notification appliances, HVAC control, suppression control and annunciation. In this system, each discrete addressable LHS cable zone will report an individual alarm to the SmartOne®-compatible fire control panel. Addressable LHS cable zones are created by attaching each LHS cable zone to an Addressable Input module (P/N 70-407008-001).