Det-Tronics X3300EXE Protect-IR Multispectrum IR Flame Detector - Manual (Page 12)

6. If all wiring checks out and cleaning of the oi
plate/window did not correct the fault condition,
check for high levels of background IR radiation by
covering the detector with the factory supplied
cover or aluminum foil. If the fault condition clears
within 6 minutes or less, extreme background IR is
present. Re-adjust the view of the detector away
from the IR source or relocate the detector.
If none of these actions corrects the problem, return the
detector to the factory for repair.
NOTE
Since the entire unit must be returned to the
factory for repair, it is highly recommended that a
complete spare be kept on hand for field
replacement to ensure continuous protection.
PERIODIC CHECKOUT PROCEDURE
Periodic testing is not required when the detector is
configured for automatic optical integrity testing. If the
X3300 is configured for manual
oi operation, a
checkout of the system using the oi feature should be
performed on a regularly scheduled basis to ensure that
the system is operating properly. To test the system,
perform the “Fire Alarm Test” as described in the
“Startup Procedure” section of this manual.
MAINTENANCE
IMPORTANT
Periodic flamepath inspections are not
recommended since the product is not intended to
be serviced and provides proper ingress protection
to eliminate potential deterioration of the flamepaths.
WARNING
The detector contains no user serviceable
components and should never be opened.
To maintain maximum sensitivity, the viewing windows
of the X3300 must be kept relatively clean. Refer to the
procedure below for instructions.
CLEANING PROCEDURE
CAUTION
Disable any extinguishing equipment that is
connected to the unit to prevent unwanted
actuation.
To clean the window and oi plate, use Det-Tronics
window cleaner (part number 001680-001) and a soft
cloth or tissue and refer to the procedure below.
1. Disable any extinguishing equipment that is
connected to the unit.
2. Since the X3300 is less affected by contamination
than other detectors, removal of the
oi plate is
needed only under extreme conditions. In addition,
it is not necessary to achieve perfect cleanliness,
because IR is not significantly absorbed by slight
films of oil and/or salt. If a fault condition is still
indicated after cleaning, remove and clean the
oi
plate using the procedure below.
3. Clean all three viewing windows and reflector
surfaces thoroughly using a clean cloth, cotton
swab or tissue and Det-Tronics window cleaning
solution. If a stronger solution is needed, isopropyl
alcohol may be used.
Oi PLATE REMOVAL
1. Remove the oi plate from the detector by loosening
the oi plate knob.
2. Thoroughly clean the oi plate reflective surfaces,
holding it by its edges to avoid leaving fingerprints
on the inside reflective surface.
3. Re-install the oi plate. Ensure that the plate is flat
on the detector surface. Tighten the oi plate knob
securely (40 oz/inches).
NOTE
If the oi plate is removed, be sure to install the
original oi plate. oi plates are not interchangeable
and should not be mixed with oi plates from other
detectors.
NOTE
If corrosive contaminants in the atmosphere cause
the
oi plate surface to deteriorate to the extent that
it is no longer possible to restore it to its original
condition, it must be replaced. Consult factory for
oi plate replacement procedure.
10
Current Level Status Action
0 mA Open Circuit Check wiring
connections.
1 mA General Fault Cycle power.
2 mA Oi Fault Clean windows.
3 mA Hi Background IR Remove IR source or
aim detector away
from IR source.
4 mA Normal Operation
20 mA Alarm
Table 4—Troubleshooting Guide