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D400-54-00                     REV#-002 

I56-023-000

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)

  . Position the magnet against the cover opposite the 

test module socket. (See Figure .)

  2. The LEDs on the detector should light within 0 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 mod-

ule’s manual.

C. Direct Heat Method (Heat Gun)

  . From the side of the detector, direct the heat toward 

the sensor. Hold the heat source about 5 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  445HTA  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 de-

tectors 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 im-

mediately after a fire.

Before  cleaning,  notify  the  proper  authorities  that  the 

system  is  undergoing  maintenance  and  therefore  the 

system will temporarily be out of service. Disable the loop 

or system undergoing maintenance to prevent unwanted 

alarms.

. 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.

Summary of Contents for 4451HTA

Page 1: ...d with compatible control panels only 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 Two LEDs on each detector light to provide 360 ...

Page 2: ...til 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 ...

Page 3: ...ded 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 ...

Page 4: ...bove limitation or exclusion may not apply to you This Warranty gives you spe cif ic legal rights and you may also have other rights under common law 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 ...

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