VESDA by Xtralis
VESDA VLF-500 Product Guide
www.xtralis.com
37
7
Factory Defaults
Parameter
Allowed values
Default values
Alert Smoke Threshold 1 & 2
0.025% - 2.0% obs/m*
(0.008% - 0.625% obs/ft.)
0.08% obs/m
(0.025% obs/ft.)
Action Smoke Threshold 1 & 2
0.025% - 2.0% obs/m*
(0.008% - 0.625% obs/ft.)
0.14% obs/m
(0.0448% obs/ft.)
Fire-1 Smoke Threshold 1 & 2
0.025% - 20% obs/m*
(0.008% - 6.25% obs/ft.)
0.2% obs/m
(0.0625% obs/ft.)
Fire-2 Smoke Threshold 1 & 2
0.025% - 20% obs/m*
(0.008% - 6.25% obs/ft.)
2.0% obs/m
(0.625% obs/ft.)
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%
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.
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 2.0 %obs/m (0.64 %obs/ft.).
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