Det-Tronics U7099 Dual Frequency IR Detector/Controller - Manual (Page 7)

8. Activate the extinguishing system at the completion
of the Startup/Test Procedure.
PERIODIC CHECKOUT PROCEDURE
A periodic system checkout should be scheduled to
ensure that the system is operating properly. The peri-
od between checkouts depends on the potential hazard
and environmental conditions encountered. Frequent
checkouts increase the dependability of the system.
When checking the electronics of the controller and the
cleanliness of the detector window, the extinguishing
equipment must be disabled. The simplest method is a
remote key switch that disconnects or inhibits the extin-
guishing equipment.
To check the detectors, hold a dual intensity, flickering
IR source such as the Det-Tronics Model W868 Test
Lamp against the detector for 5 to 10 seconds.
Controller response (Fire relay energizes) indicates a
clean window and sensors, and that all electronic cir-
cuits are operational. Lack of response indicates sensi-
tivity is reduced due to heavy contamination on the win-
dows, defective sensor or electronic circuit problems.
See the “Troubleshooting” section if the controller does
not respond correctly.
TROUBLESHOOTING
Proceed through steps 1 through 7 before disassem-
bling the unit.
1. Disable any extinguishing system connected to the
unit.
2. Inspect the window for contamination that could
prevent infrared radiation from reaching the sensor.
To clean the window, use Det-Tronics window
cleaner solution and a soft cloth or tissue.
3. Check input power to the detector and ensure that
the warmup period is complete. Check circuit pro-
tection fuses (250 volt, 1/4 ampere) mounted on ter-
minal block. See Figure 9.
4. Hold the IR source close to the unit for 5 to 10 sec-
onds.
5. Alarm device (if connected) will activate.
6. Extinguish the IR source.
7. If the alarm device activated in response to the IR
source, reset the system and proceed to step 10. If
the device does not respond, proceed to step 8.
8. Turn off input power.
9. Replace the sensor/controller module (refer to
Figure 8).
a. Remove sensor cap.
b. Slide sensor/controller module out of housing.
c. Slide replacement sensor/controller module into
the housing. Ensure the the replacement mod-
ule is properly aligned with the index pin inside
the housing before pressing it firmly into place.
NOTE
The housing base is spring loaded. To ensure the
proper seating of the module, press firmly down-
ward on the module top. The module should con-
tact the detector barrel. If not, remove the module
and check alignment before re-installing.
d. Ensure that the O-rings on top of the module
and at the top of the barrel are positioned cor-
rectly (see Figure 8) and in good repair (no
cracks or breaks).
e. Replace sensor cap.
10. Repeat the “Startup Procedure” before returning the
system to normal operation. Do not attempt to
repair the IR sensor/controller module. Return all
faulty components to the factory for repair.
DEVICE REPAIR AND RETURN
Prior to returning devices or components, contact the
nearest local Detector Electronics office so that an RMI
(Return Material Identification) number can be
assigned. A written statement describing the malfunc-
tion must accompany the returned device or component
to expedite finding the cause of the failure, thereby
reducing the time and cost of the repair.
Pack the unit properly. Use sufficient packing material
in addition to an antistatic bag or aluminum-backed
cardboard as protection from electrostatic discharge.
Return all equipment transportation prepaid to the
Minneapolis location.
OFFICE LOCATIONS
Detector Electronics Corporation
6901 West 110th Street
Minneapolis, Minnesota 55438 USA
Telephone (612) 941-5665 or (800) 765-FIRE
Telex 6879043 DETEL UW
Cable DETRONICS
Facsimile (612) 829-8750
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