Model 3600-I IR3 Flame Detector
Page 25 of 66
1.6.2.3 Manual BIT
The BIT is manually initiated by momentarily connecting Terminal 3 with Terminal 2 (or a switch across
these terminals in the safe area).
If the BIT is unsuccessful, all outputs will function as described for Automatic BIT, but the BIT is now
automatically executed every 1 minute. This continues until a successful BIT occurs, when the detector
will resume normal operation.
The results of a successful and unsuccessful Manual BIT are listed in the tables below:
Output
Result
FAULT relay
Wiring options 1, 2, and 4: remains CLOSED (Normal)
Wiring options 3 and 5: remains OPEN (Normal)
ALARM relay
Activated for 3 sec (only when the function Alarm BIT is set to YES)
AUXILIARY
relay
For wiring options 4 and 5: is activated for 3 sec (only when the
function Auxiliary BIT is set to YES)
0-20mA output
Wiring option 1, 2, 3:
Initiates 20mA only when the function Alarm BIT is set to YES
Initiates 16mA when the function Auxiliary BIT is set to YES and
the function Alarm BIT is set to NO
POWER LED
Green, Flashing, 1 Hz
Figure 16: Results of a Successful Manual BIT
Output
Result
FAULT relay
Wiring option 1, 2, 4: changes to OPEN
Wiring option 3 and 5:changes to CLOSED
0-20mA output
Wiring option 1, 2, 3: Indicates BIT FAULT (2mA)
POWER LED
Yellow, Flashing, 4 Hz
Figure 17: Results of a Unsuccessful Manual BIT
1.6.2.4 Manual BIT Only Selected
The BIT is initiated manually by momentarily connecting Terminal Number 3 with Terminal Number 2 or a
switch across these terminals in the safe area.