System Sensor 5451 User manual

D400-29-00 1 I56-580-04R
INSTALLATION AND MAINTENANCE INSTRUCTIONS
5451 Plug-in Rate-of-Rise
Thermal Detector with
Fixed Temperature Alarm
Specifications
Diameter: 4.1 inches (104 mm)
Height: 2.1 inches (53 mm)
Weight: 5 ounces (150 g)
Installation Temperatures: 32° to 100°F (0° to 38°C)
Operating Humidity Range: 10% to 93% Relative Humidity
Latching Alarm: Reset by momentary power interruption
Sensitivity 135°F (57°C) Fixed or 15°F/min rate-of-rise
Operating Voltage: 15-35 VDC
Standby Current: 100 µA
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
detectors, NFPA 72.
Therefore, the installer must be familiar with these require-
ments, 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.
General Description
Model 5451 is a rate-of-rise with fixed temperature alarm
thermal detector utilizing a state-of-the-art dual thermistor
sensing circuit. These detectors are designed to provide
open area protection with 50-foot spacing capability, and
are 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 detec-
tor 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. This detector is 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.

D400-29-00 2 I56-580-04R
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 man-
ual for testing procedure.)
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.
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 that the system is in oper-
ation.
WARNING
Tamper Resistance
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.
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
unwanted alarms.
Detectors must be tested after installation and periodic
maintenance. The 5451 may be tested as follows:
A. Test Magnet (System Sensor Model No. 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.
TEST
MAGNET
LED
TEST MODULE
SOCKET
LED
PAINTED
SURFACE
TEST
MAGNET
Figure 1. Bottom and Side Views Showing Position of Test Magnet:

D400-29-00 3 I56-580-04R
B. Test Module (System Sensor Model No. MOD400 or
MOD400R)
The MOD400 or MOD400R is used with a DMM or volt
meter to check the detector sensitivity as described in
the module’s manual.
C. Direct Heat Method (Hair dryer of 1000 - 1500 watts)
From the side of the detector, direct the heat toward the
sensor. Hold the heat source about 15 cm away to pre-
vent damage to the cover during testing.
NOTE: If a detector goes into alarm, it will reset only if the
detector has cooled and if its power is momentari-
ly 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
described under MAINTENANCE and retested. If the detec-
tors still fail these tests they should be returned for repair.
Maintenance
The 5451 detector has been designed to be as maintenance-
free as possible. Normal air-borne dust, however, can accu-
mulate on the detector’s sensing elements and cause them
to become less sensitive. All detectors 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 immediately 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 detector as described under TESTING.

D400-29-00 4 I56-580-04R
©2001 System Sensor
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 obli-
gations 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
Department, 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,
modifications, or alterations occurring after the date of manufacture. In no
case shall the Company be liable for any consequential or incidental dam-
ages for breach of this or any other Warranty, expressed or implied what-
soever, 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 consequential 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.
Please refer to insert for the Limitations of Fire Alarm Systems