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©Firefly AB (Oktober 2016)
Alarm Condition - No Fire Present:
A detector in alarm condition when no fire is present may be caused
by an inadvertent actuation of the manual test . Except for Models
660-XX0XX and 860-XX0XX, the Model 660 and 860 flame detectors
feature manually initiated self-test of the optical and electronic
systems .
Verify the light guides are illuminated . If they are, then check
the manual test wiring and the test switch for broken, loose, or
intermittent connections . Repair or tighten any faulty connections .
If the light guides are not illuminated, then contact your Firefly AB
representative .
Confidence Condition:
Model 660 and 860 flame detectors are equipped with a fault relay to
annunciate a change in the operational status of the detector . When
power is applied to the detector, the fault relay will energize within 2
seconds . A loss of power will cause the relay to de-energize .
If the fault relay output fails to change state within 2 seconds after
power-up and the amber LED fails to illuminate, then there may be no
power reaching the detector’s electronic module . Check the supply
voltage, the condition of the fuse located at F1 on the PCB and the
wiring to terminals 8 and 10 . Also, inspect the wiring to the fault relay
terminals 6 and 7 and the jumper JP1 that sets the fault relay option .
Note: Model 660-0XXXX and 860-XXXXX flame detectors are equipped
with a 0 to 20 mA option . A loss of power will result in a constant 0 mA
output .
If the fault relay output continues to be inoperative, isolate the relay
contacts by disconnecting the external wiring to the fault relay
terminals . Connect an Ohmmeter across the fault relay terminals and
monitor for an actuation of the relay . Repair the external wiring if
necessary .
Fault Condition:
Model 660-0XXXX and 860-XXXXX flame detectors are equipped with
a 0 to 20 mA output . When the 0 to 20 mA option is not used in your
application, make sure that the 0 to 20 mA option is “OFF” on the USI .
If the 0 to 20 mA option is “ON” and at any time the drive line opens or
the current sense does not equate to what is suppose to be there, it
will cause the activation of the fault outputs . Check the wire terminal
15 and insure that a good signal ground is present at terminal 10 or
11 . To insure that the 0 to 20 mA option causes the fault condition,
toggle the option on the USI “OFF” and reset the detector by toggling
the power off then on . If the fault condition continues to be activated,
then the problem is in a different area .
Model 660-XX1XX and 860-XX1XX flame detectors are equipped with
automatic self-test in addition to the manual test . Approximately every
15 minutes the automatic self-test is actuated, and for a brief time
interval, the optics and electronics are checked for functionality .
The exception to this is for the high-speed setting on 660 models . In
this configuration (switch 5 “OFF”), self-test is actuated approximately
every 2 minutes . A failure of the automatic self-test is annunciated
by the activation of the Fault Outputs . If a detector goes into a fault
condition, the optical surfaces should be checked for cleanliness . Clean
sensor windows and light guide ends are necessary for the detector(s)
to pass self-test .
After the optical surfaces have been inspected and cleaned, reset the
detector . If the detector is wired for manual test, perform the manual
test . The typical response time should be from 0 .6 seconds beyond the
actual fire output time delay .
*WARNING*
During Manual Test, the fire output will be actuated .
Always disable extinguishing circuits before testing .
If the detector continues to go into a fault condition following
a cleaning of the optical surfaces, check the supply voltage and
wiring at terminals 8 or 9 and 10 or 11 . Look for loose or intermittent
connections .
During normal operation, the fault outputs will change state on
power-up . The output will return to its original state if power to the
detector is removed . If the fault output is intermittent or erratic, check
the supply voltage and wiring to terminals 8 or 9 and 10 or 11 . Inspect
the fault relay wiring on the detectors . Repair or tighten any loose
connections .
For the Model 860, if the UV or IR option is “ON”, the fault relay will be
flashing at a 1 Hz rate whenever a fault conditions exists .
Manual Test Failure:
*WARNING*
This test will activate the fire outputs . Always disable
extinguishing circuits before testing .
A manual test is actuated by connecting the 660-XX1XX or 860-XX1XX
test circuit terminal 12 to the plus terminal of the detector’s input
power supply (terminal 8 or 9) .
During manual test, the optical and electronic systems of a detector
are checked . Upon successful completion of the test, the fire outputs
will be activated . Also, the red LED
inside the detector, visible through the UV window, will turn “ON” . The
typical response time is 0 .6 seconds beyond the actual fire output time
delay . If the detector fails to respond to a manual test, check to see if
the USI manual test option is “ON” (switch 1) .
If the detector fails manual test by activating the fault outputs or the
response time is longer than expected, the optical surfaces of the
detector may require cleaning . Clean the sensor windows and light
guide ends . After cleaning, initiate the manual test .
If the detector again fails manual test, check the wiring to the supply
voltage terminals 8 or 9 and 10 or 11 . The detector may not be
receiving enough power; the wiring connections may be loose or
intermittent . If the red LED is illuminated and there is no fire output,
then check all the connections to the fire alarm panel or annunciating
devices . A defective test switch may prevent the test circuit from
initializing . Initiate the manual test by connecting a wire from the test
switch terminals to the positive terminal of the input power supply .
Replace the switch if the manual test operates when the wire is
connected .
UV or IR Warning:
In addition to detecting fire, the Model 860 flame detectors will
annunciate a warning of potentially hazardous conditions that could
cause a fire . For example, welding, a process which emits a far greater
proportion of UV radiation than IR, will cause an actuation of the UV
or IR Outputs but not the Fire Outputs . For this detector to actuate
the Fire Outputs, it must sense the simultaneous presence of UV and
IR in a ratio characteristic of the fire type(s) to which the detector is
configured .
When the detector senses persistent source of intense UV or IR
radiation, such as welding, sparks, or radiant heat, the UV or IR Outputs
will change state . To enable the UV or IR Outputs, the UV or IR option
(switch 5) must be “ON” . When the UV or IR Outputs are activated, it
will cause the fault relay to be “OFF” and the amber LED to be“ON”
constantly . If the 0 to 20 mA option is “ON”, it will set the output to 16
ma . The UV or IR warning are non-latching outputs and will change
states if the problem source is removed .
This alarm is used as a tool to help prevent unwanted alarms . An UV
or IR warning should always be investigated with caution . If possible,
remove the source of radiation, as a constant presence of UV may
reduce detector sensitivity and compromise its discrimination ability .
Inspect the protected area and beyond; UV from sources such as
welding can be sensed at great distances . If no radiation sources are
apparent, cover the detector with opaque material to test whether the
UV or IR warning disappears when the sensor windows are blocked .
Continue searching for the source of UV or IR, if necessary . If the
warning does not disappear after blocking the windows, a sensor may
be faulty and in need of repair .
DMLieferant
Тел
.: +7 (499) 990-05-50; +7 (800) 775-29-59 dmliefer.ru
