VDOT-ASD-400 Aspiration Detector
Velocity Detection
21
VDOT-ASD-400 Aspirating Smoke Detector User’s Manual V1
Control
Key
Action
Description
RESET
Press once
Reset, press this key to clear alarms or faults.
ISOLATE/
De-ISOLATE
Press and hold for 2 sec.
The device will be isolated when it was not
isolated. It will be de-isolated if it was isolated.
SILENCE
Press and hold for 2 sec.
The beeper will be silenced.
TEST
Press and hold for 2 sec.
All LED indicators on the display will go on for 3
seconds and go off for two seconds as a cycle. The
cycle repeats twice for the user to check if there’s
any malfunction LED.
The difference of SILENCE and ISOLATE is that SILENCE is used to silence the beeper, confirming the
alarm or fault status. When there is a new alarm or fault in occurrence the beeper will activate
again; while ISOLATE is to completely isolate the system alarm from the corresponding output,
there will be NO alarm output when the device is isolated.
Press and hold <RESET> key for 2 seconds shall enter into program mode. For the key function in
program mode please see the parameter setting section.
Display
o
Indicators
Indicator (color) Description
PWR (green)
When the device is powered.
ISOL (yellow)
When the device is isolated
ALERT (red)
When the Alert Threshold has been reached and the appropriate time delays
have expired. The detector will generate Alert Alarm.
ACTION (red)
When the Action Threshold has been reached and the appropriate time
delays have expired. The detector will generate Action Alarm.
FIRE 1 (red)
When the Fire 1 Threshold has been reached and the appropriate time
delays have expired. The detector will generate Fire 1 Alarm.
