Analogue lINEAR HEAT dETECTION

Overview of LHD

FyreLine linear heat detection provides early warning of fire or  overheating equipment. Heat sensing cables are capable of detecting heat  anywhere along their length and designed for use in commercial and  industrial applications.

Linear heat detection is highly cost-effective and can be easily  installed with, or in place of, conventional heat detectors where  traditional style detection may be difficult to install or maintain or  is too expensive.

How Does Linear Heat Detection Work?

There are two types of heat sensing cable available, fixed temperature (Digital) and analogue:

FyreLine Analogue Heat Sensing Cable

FyreLine analogue heat sensing cable monitors  significant increases in temperature, providing both pre-alarm and  alarm, and is fully resettable.

A FyreLine analogue controller and end of line unit are required in order for FyreLine analogue heat sensing cable to be fully monitored for open and short circuit.

Overview

The FyreLine Analogue Heat Detector is a rugged, easy-to-install  detection system, consisting of a control module and detection cable,  that is designed to interface with a standard fire alarm panel or  addressable monitor module.

Heat sensing cables are capable of detecting heat anywhere along  their length and designed for use in a vast range of applications and  environments from tunnels, cable trays, racking to sensing changes in  temperature within escalators and other applications where many risks of  fire are hidden from view. Linear heat detection is highly  cost-effective and can be easily installed with, or in place of,  conventional heat detectors where traditional style detection may be  difficult to install or maintain or is too expensive.

FyreLine Analogue Heat Detectors automatically compensate for changes  in ambient temperature to maintain the accuracy of the alarm  temperature and offer up to 500 metres of continuous detection per  control module. This flexibility makes FyreLine Analogue Heat detectors  extremely flexible for use in a wide range of applications.

How Does Linear Heat Detection Work?

When the temperature around the cable reaches  pre-alarm temperature the control module triggers a warning, giving the  user time to investigate and take any necessary action. The control  module will only trigger full alarm when the temperature reaches a  specified alarm point.

After an alarm is triggered the system can  simply be reset with little disruption. FyreLine Analogue Linear Heat  Detection cable is ‘self-restorable’ so does not need to be replaced  unless it has become severely damaged.

Fire Alarm System Integration

The analogue linear heat detection control  module can be connected directly to a single zone of a conventional fire  alarm control panel, or, easily interfaced to an addressable loop using  an addressable zone/switch monitor.

Sensing Cable Construction

FyreLine Analogue Linear Heat Detection cable  is constructed using a pair of copper conductors coated in a  temperature sensitive polymer whose resistance changes as a function of  temperature. A calibration resistance (white) and average ambient  temperature sensor (red) core are twisted with the two original  conductors. A foil shield, outer sheath and optional protective coating  is extruded over the twisted cores.

Wiring Configurations

Conventional Fire Alarm Systems

FyreLine Analogue Linear Heat Detection Cable  should be connected to a conventional fire alarm control panel via the  initiating device circuit.

In the circumstance that the area to be  protected is some distance away, leader cable may be used between the  FyreLine control module and the fire alarm control panel.

Addressable Fire Alarm Systems

When using FyreLine Analogue Linear Heat  Detection in conjunction with an addressable fire alarm system it should  be connected onto the addressable loop using a switch or zone monitor.  An external power supply is needed for the FyreLine control module.