System Sensor 4451HT User manual

D400-54-00 1 I56-690-04
4451HT and 4451HTA Plug-in
Fixed Intermediate Temperature
Thermal Detectors
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
Before Installing
This detector must be installed in compliance with the con-
trol panel installation manual and meet the requirements of
the authority having jurisdiction. In addition, the National
Fire Protection Association has published codes, standards,
and recommended practices for the installation and use of
the above appliances (NFPA 72). For installation in Canada,
refer to CAN/ULC-S524 and CEC Part 1, Sec. 32. Therefore,
the installer must be familiar with these requirements, with
local codes, and any special requirements of the authority
having jurisdiction.
NOTICE: This manual should be left with the owner/user
of this equipment.
IMPORTANT: This detector must be tested and maintained
regularly following NFPA 72 requirements. The detector
should be cleaned at least once a year.
Specifications
Diameter: 4.1 inches (104 mm)
Height: 2.1 inches (53 mm)
Weight: 5 ounces (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 sensing circuit. These detectors are
designed to be used with compatible control panels only.
Two LEDs on each detector light to provide 360°visibility
of the detector indication. Remote LED annunciator capa-
bility is provided as standard, and the RA400Z remote LED
annunciator is available as an optional accessory.
Base Selection And Wiring Guide
Refer to the installation instructions for the plug-in detector
bases for base selection and wiring instructions. System
Sensor has available a variety of detector bases for these
heat detectors, including 2-wire applications with and
without relays and/or current limiting resistors for use with
control panels that require one. These detectors are only to
be used with 400 and 400B series bases.
Install the System Sensor plug-in base to be used with the
detector following the instructions in the base manual.
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D400-54-00 2 I56-690-04
Installation
NOTE: All wiring must conform to applicable installation
codes and regulations.
NOTE: Verify that all detector bases are installed, that the
initiating-device circuits have been tested, and that
the wiring is correct. (Refer to detector base
manual for testing procedure.)
CAUTION
Disconnect the power from initiating-device circuits before
installing detectors.
1. Install Detectors:
a. Insert the detector into the detector base.
b. Turn the detector 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 power to
the control unit.
3. Test the detector using the magnet as described under
TESTING.
4. Reset the detector at the system control panel.
5. Notify the proper authorities the system is in operation.
Figure 1. Test magnet position:
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D400-54-00 3 I56-690-04
Testing
Before testing, notify the proper authorities that the heat
detector system is undergoing maintenance, and therefore
the system will temporarily be out of service. Disable the
zone or system undergoing maintenance to prevent un-
wanted alarms.
Detectors must be tested after installation and periodic
maintenance. Test the detector as follows:
A. Test Magnet (System Sensor Model M02-04)
1. Position the magnet against the cover opposite the
test module socket. (See Figure 1.)
2. The LEDs on the detector should light within 10 sec-
onds. If the LEDs fail to light, check the power to the
detector and the wiring in the detector base.
3. Reset the detector at the system control panel.
B. Test Module (System Sensor Model MOD400R)
The MOD400R is used with a DMM or voltmeter to
check the detector sensitivity as described in the
module’s manual.
C. Direct Heat Method (Heat Gun)
1. From the side of the detector, direct the heat toward
the sensor. Hold the heat source about 15 cm away to
prevent damage to the cover during testing.
CAUTION
Avoid exposing the detector cover to the heat source for
more than 15 seconds. Extended periods of extreme heat
can melt 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 MAINTENANCE and retested. If the detec-
tors still fail these tests they should be returned for repair.
Maintenance
The 4451HT and 4451HTA detectors have been designed to
be as maintenance-free as possible. Normal air-borne dust,
however, can accumulate on the detector’s sensing ele-
ments and cause them to become less sensitive. All detec-
tors should be tested and cleaned at least once a year, and
those in dustier areas should be tested and cleaned more
often. Detectors must also be cleaned and tested immedi-
ately after a fire.
Before cleaning, notify the proper authorities that the sys-
tem is undergoing maintenance and therefore the system
will temporarily be out of service. Disable the loop or sys-
tem undergoing maintenance to prevent unwanted alarms.
1. Remove detector from mounting base.
2. Use a vacuum cleaner to remove dust from the sensing
chamber.
3. Reinstall the detector.
4. Test the detector as described under TESTING.
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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 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 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.
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