VESDA VESDA VLF-500-UL 7Ed Product Guide
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7 Factory Defaults
Parameter Allowed values Default values
Alert Smoke Threshold 1 & 2 0.008% - 0.625% obs/ft.*
(0.025% - 2.0% obs/m)
0.025% obs/ft.
(0.08% obs/m)
Action Smoke Threshold 1 & 2 0.008% - 0.625% obs/ft.*
(0.025% - 2.0% obs/m)
0.0448% obs/ft.
(0.14% obs/m)
Fire-1 Smoke Threshold 1 & 2 0.008% - 6.25% obs/ft.*
(0.025% - 20% obs/m)
0.0625% obs/ft.
(0.2% obs/m)
Fire-2 Smoke Threshold 1 & 2 0.008% - 6.25% obs/ft.*
(0.025% - 20% obs/m)
0.625% obs/ft.
(2.0% obs/m)
Alert Verification Delay 1 & 2 0 - 60 seconds 10 seconds
Action Verification Delay 1 & 2 0 - 60 seconds 10 seconds
Fire 1 Verification Delay 1 & 2 0 - 60 seconds 10 seconds
Fire 2 Verification Delay 1 & 2 0 - 60 seconds 10 seconds
Alarm Latching Enable Enabled or Disabled Enabled
Fault Latching Enable Enabled or Disabled Disabled
Airflow – Major High Flow Fault 100% - 150% 130%
Airflow – Major Low Flow Fault 50% - 100% 70%
Airflow – Minor High Flow Fault 100% - 150% 120%
Airflow – Minor Low Flow Fault 50% - 100% 80%
ULMode** Open Area - Special Applications Open Area
AutoLearn Smoke 15 min. – 15 days 14 days
AutoLearn Flow 15 min. – 15 days 14 days
Smoke Test Button Enabled or Disabled Disabled
Threshold set 1 and 2 Day (1) & Night (2) / Disabled Disabled
Table 7-1: Factory defaults
* For code-specific information, refer to Codes and Standards Information for Air Sampling Smoke Detection on page iii.
** AutoLearn smoke not avaliable when used in Open area mode.
Note: If installing the detector as a UL compliant system the alarm signal connected to the control panel
for the fire evacuation shall not be less than 0.64 %obs/ft. (2.0 %obs/m).
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