User's Manual

Effective: June 2006
LHS™ Linear Heat Sensor
Installation Instructions
73-202
DESCRIPTION
The LHS™ Linear Heat Sensor cable is a flexible, durable
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 consists
of a twisted pair of 19 AWG copper coated steel conductors
covered by a temperature sensitive insulation, and protected
by either a plastic braid or jacket for various environmental
applications (see Figure 1).
LHS is designed for open area as well as proximity detec-
tion. A wide range of jackets and operating temperatures
(see Table 1) are available for proper system design, in-
cluding confined areas or harsh environments which pro-
hibit the use of other forms of detection. LHS cable is
compatible with any Fire Control Panel that is capable of
accepting contact closure type initiating devices.
The LHS linear heat detector is Factory Mutual Approved.
An FM Approved installation requires the LHS cable to be
connected to an FM Approved Fire Control Panel.
OPERATION
The heat from a fire causes the LHS cable’s special insula-
tion to melt at a specific temperature, allowing the two con-
ductors to short together, thus creating an alarm condition
on the Fire Control Panel. The LHS cable may also be used
as a stand-alone contact device. The LHS normal operat-
ing state is an open circuit.
Jacket
Thermoplastic strip
braid, PVC, nylon, or
fluoropolymer
Insulation
Temperature-sensitive
thermoplastic or
fluoropolymer
Conductor
Tinned
copper-covered
steel
Figure 1. Cable Construction
Part Number:
656 ft (200 m) length roll
3,280 ft (1000 m) length roll
73-200000-001
73-201000-001
73-200000-011
73-201000-011
73-200000-002
73-201000-002
73-200000-012
73-201000-012
73-200000-003
73-201000-003
73-200000-004
73-201000-004
73-200000-005
73-201000-005
Alarm Temperature
155°F (68°C) 155°F (68°C) 185°F (85°C) 185°F (85°C) 220°F (105°C) 350°F (176°C) 465°F (240°C)
Ambient Storage Temp. *
Up to 113°F (45°C) Up to 113°F (45°C) Up to 113°F (45°C) Up to 113°F (45°C) Up to 158°F (70°C) Up to 221°F (105°C) Up to 392°F (200°C)
Min. Installation Temp.
5°F (-15°C) 5°F (-15°C) 5°F (-15°C) 5°F (-15°C) 32°F (0°C) 32°F (0°C) -4°F (-20°C)
Min. Operating Temp. **
-40°F (-40°C) -40°F (-40°C) -40°F (-40°C) -40°F (-40°C) -22°F (-30°C) -40°F (-40°C) -58°F (-50°C)
Application
Indoor Only Indoor/Outdoor Indoor Only Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor
Approved Spacing
20 ft. (6 m) maximum 20 ft. (6 m) maximum 20 ft. (6 m) maximum 20 ft. (6 m) maximum 20 ft. (6 m) maximum Proximity Detection Proximity Detection
Flame Detection
5 seconds (max) 5 seconds (max) 5 seconds (max) 5 seconds (max) 12 seconds (max) 20 seconds (max) 20 seconds (max)
Outer Jacket Material
Polypropylene Braid Nylon Polypropylene Braid Nylon PVC PVC FEP
Outer Jacket Color
Red/Green Tracer
Black
Marked H8040N
Red/Black Tracer
Black
Marked H8045N
Black Red White
Conductor Insulation
EVA EVA EVA EVA Polythene Polypropylene FEP
Conductor Color
1 Black
1 Red
1 Black
1 Red
1 Black
1 Red
1 Black
1 Red
1 Black
1 Red
1 Black
1 Black/White
1 Black
1 White
External Diameter
0.146 inch (3.7 mm) 0.132 inch (3.35 mm) 0.146 inch (3.7 mm) 0.132 inch (3.35 mm) 0.167 inch (4.25 mm) 0.171 inch (4.35 mm) 0.138 inch (3.5 mm)
Electrical Rating
1 Amp maximum, 110 Vdc maximum
Conductor Resistance
30.48 ohms/1000 ft. @ 68°F (100 ohms/1000 m) @ 20°C
Conductor Capacitance
20.21 pF/ft.
(66.32 pF/m)
20.21 pF/ft.
(66.32 pF/m)
25.42 pF/ft.
(83.41 pF/m)
25.42 pF/ft.
(83.41 pF/m)
19.96 pF/ft.
(65.48 pF/m)
17.52 pF/ft.
(57.48 pF/m)
19.22 pF/ft.
(63.07 pF/m)
Insulation Rating
1000 megohm per 3280 ft. (1000 m) after 1 minute @ 500 Vdc Minimum
Weight
11.29 lb./1000 ft.
(16.8 kg/km)
10.65 lb./1000 ft.
(15.85 kg/km)
11.29 lb./1000 ft.
(16.8 kg/km)
10.65 lb./1000 ft.
(15.85 kg/km)
15.25 lb./1000 ft.
(22.7 kg/km)
12.67 lb./1000 ft.
(18.85 kg/km)
14.65 lb./1000 ft.
(21.8 kg/km)
* Do not store in direct sunlight. ** When not subjected to vibration.
Table 1. LHS Sensor Cable Specification