System Sensor 4451HT Plug-in Fixed - Manual (Page 2)

D400-54-00 2 I56-0690-005R
©2007 System Sensor
NOTE: Verify that all detector bases are installed, that the ini-
tiating-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 in-
stalling 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, pre-
vents 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.
Testing
Before testing, notify the proper authorities that the heat de-
tector 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 main-
tenance. 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 2.)
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 de-
tector 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) mo-
mentarily cuts off power to the detector loop.
Detectors that fail these tests should be cleaned as described
under MAINTENANCE and retested. If the detectors 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, how-
ever, can accumulate 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 system
is undergoing maintenance and therefore the system will tem-
porarily be out of service. Disable the loop or system undergo-
ing 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.
Figure 2. Test magnet position:
TEST
MAGNET
LED
TEST MODULE
SOCKET
LED
C0957-00
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 detec-
tor. No agent, representative, dealer, or employee of the Company has the authority
to increase or alter the obligations 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, Returns Department, RA #__________, 3825 Ohio Avenue, St.
Three-Year Limited Warranty
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 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 limita-
tion 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