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F-Guard IR3 HD User Manual
Testing
The detector has a Built-In-Test (BIT) capability to ensure proper operation and to indicate when
the windows are dirty. The BIT process runs automatically at startup and periodically during the
operation of the detector. The BIT can also be initiated manually by connecting the “Manual BIT”
terminal and the “24 VDC (-) “terminal for one second (see Table 1) or by using the
Gastech
communicator software (connected through RS-485).
In the case of the “Dirty Window” fault, the detector may still detect flames but at a lower
sensitivity.
When the “Manual BIT – Alarm Output Test” feature is enabled (see section3.11), a successful
Manual BIT will activate the following alarm outputs for a few seconds:
1. The LED in the front of the detector will turn red.
2. The 0-20mA current output will be set to 20mA.
3. The alarm relay will close.
Warning
Make sure all fire extinguishing actions or alarms connected to the detector are
DISABLED when the manual BIT is initiated and the “Manual BIT – Alarm Output Test”
is enabled, as the manual BIT will set the 0-20mA terminal to 20mA and close the alarm
relay.
Flame Simulator
Flame simulators are often used by industry to perform detector testing during installation and
periodic end to end testing of a flame detector alarm system. Refer to the F-Guard Flame
simulator manual for full instructions.
