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D400-54-00

4

I56-690-04

 © System Sensor 1996

Three-Year Limited Warranty

System Sensor warrants its enclosed heat detector to be free from defects
in materials and workmanship under normal use and service for a period
of three years from date of manufacture. System Sensor makes no other
express warranty for this heat detector. No agent, representative, dealer, or
employee of the Company has the authority to increase or alter the obliga-
tions or limitations of this Warranty. The Company’s obligation of this
Warranty shall be limited to the repair or replacement of any part of the
heat detector which is found to be defective in materials or workmanship
under normal use and service during the three year period commencing
with the date of manufacture. After phoning System Sensor’s toll free
number 800-SENSOR2 (736-7672) for a Return Authorization number,
send defective units postage prepaid to: System Sensor, Repair Depart-

ment, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please
include a note describing the malfunction and suspected cause of failure.
The Company shall not be obligated to repair or replace units which are
found to be defective because of damage, unreasonable use, modifica-
tions, or alterations occurring after the date of manufacture. In no case
shall the Company be liable for any consequential or incidental damages
for breach of this or any other Warranty, expressed or implied whatsoever,
even if the loss or damage is caused by the Company’s negligence or fault.
Some states do not allow the exclusion or limitation of incidental or conse-
quential damages, so the above limitation or exclusion may not apply to
you. This Warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.

WARNING

The Limitations of Proper ty Protection Heat Detectors

Heat detectors do not always detect fires because the fire may be a
slow-smoldering, low-heat type (producing smoke), or because they
may not be near where the fire occurs, or because the heat of the fire
may bypass them.

 Heat detectors will not detect smoke, gas, flames, or

combustion particles.

Heat detectors are components in professionally-installed fire alarm
systems. 

They will not function if they have been improperly wired

into the fire alarm system or if power to them is cut off for any reason.

Heat detectors cannot last forever.

 They should be tested and maintained

following the instructions in this manual. To be safe, they should be
replaced 15 years after installation.

Refer to NFPA 72 for application.

This heat detector is designed to 

activate and initiate

 emergency action,

but will do so only when it is used in conjunction with an authorized fire
alarm system. This detector must be installed in accordance with NFPA
Standard 72.

Heat detectors will not work without power.

 AC or DC-powered smoke

detectors will not work if the power supply is cut off for any reason.

Heat detectors are designed to protect property, not life.

 They do not

provide early warning of fire and cannot detect smoke, gas, combustion
particles, or flame. They alarm when temperatures at the heat detector
reach 57

°

C (135

°

F). Given the rapid growth of certain types of fires, heat

detectors cannot be expected to provide adequate warning of fires
resulting from smoking in bed, inadequate fire protection practices,
violent explosions, escaping gas, improper storage of flammable liquids
like cleaning solvents, other safety hazards, or arson.

Technical Manuals Online! - http://www.tech-man.com

Summary of Contents for 4451HT

Page 1: ...unces 150 g Installation Temperatures 32 to 150 F 0 to 66 C Operating Humidity Range 10 to 93 Relative Humidity Latching Alarm Reset by momentary power interruption Sensitivity 190 F 88 C Operating Voltage 15 35 VDC Standby Current 100 µA General Description The 4451HT and 4451HTA detectors are fixed intermediate temperature alarm thermal detectors utilizing a state of the art dual thermistor sens...

Page 2: ...ector clockwise until the detector drops into place c Continue turning detector clockwise to lock it in place Tamper Resistance Feature The detector bases include a feature that when activated prevents removal of the detector without the use of a tool Refer to the installation instruction manual of the detector base to make use of this capability 2 After all detectors have been installed apply pow...

Page 3: ... the plastic and damage the cover NOTE If a detector goes into alarm it will reset only if the detector has cooled and if its power is momentarily interrupted Check the control panel being used to determine whether the RESET switch or some other auxiliary device or control momentarily cuts off power to the detector loop Detectors that fail these tests should be cleaned as de scribed under MAINTENA...

Page 4: ...o you This Warranty gives you specific legal rights and you may also have other rights which vary from state to state WARNING The Limitations of Property Protection Heat Detectors Heat detectors do not always detect fires because the fire may be a slow smoldering low heat type producing smoke or because they may not be near where the fire occurs or because the heat of the fire may bypass them Heat...

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