Power Up
TM 787100 Rev (Af), May 2019
47
7
Operating Instructions
This chapter describes how to power up and test the detector. It also
includes some very important safety checks that you should make before
operating the detector.
7.1
Scope
The following instructions are designed to obtain optimal performance from
the detector over its life cycle.
7.2
Power Up
To power up the detector:
1
Apply power and wait approximately 60 seconds for the automatic
self-test of the detector.
Note
: Applying power initiates the following sequence:
•
4Hz LED flashes yellow and the BIT is executed
•
If successful, the 1Hz LED flashes green, and the fault relay
contacts close.
2
Wiring Inspection
: If a short-circuit or line discontinuity exists, fault
indications appear on the control unit display panel. Check your wiring.
The detector is in fault state when the supply voltage drops under
16.5V. The detector status returns to normal when the supply voltage is
above 17.5V.
3
Detector Inspection
: Visually inspect the viewing window of the
detector. It should be clean and clear. Verify the following:
•
1Hz LED flashes green
•
Alarm relay is N.O.
•
Fault relay is N.C.
•
4
–
20mA output is 5mA
4
If any of the outputs or indications is different from the description in
step 3, see
on page 52.
The flame detector is now ready for functional testing.