Xtralis VESDA-E VEP-1P - System Performance Verification

Ducts Application Note VESDA-E
35424_02 10
System Performance Verification
Verify system performance, with the Air Handling Unit (AHU) in its normal operating mode, by following the
steps below.
Step
Action
1
Connect to the smoke detector using the VESDA System Configurator (VSC) software or
a hand-held programmer. Record the initial background reading from the detector.
2
Conduct two smoke tests inside the duct using a small amount of smoke, from a smoke
cartridge (i.e. approximately 3 g), with known characteristics.
3
Record the peak smoke reading and the time taken to reach the peak.
4
To test air leakage into the smoke detector, remove the front cover of the detector. Cover
the electronics during this test with a sheet of paper.
5
Introduce smoke inside the detector’s interior housing using a smoke can.
6
Place the smoke can’s nozzle 0.5 m (1.5 ft) away from the detector and spray for no more
than 1 second. Note the peak smoke reading from the detector.
7
Repeat the smoke test twice more, after the background returns to ambient, noting the
peak smoke reading each time.
8
If all of the peak smoke readings were < initial background reading + 0.05%, proceed to
Step 10.
If any of the peak smoke readings were > initial background reading + 0.05%, there is
possibly leakage in the system that must be corrected. Proceed to Step 9.
9
Check all pipe connections and repeat Steps 5-8. If necessary, contact your local
distributor or Xtralis office.
10
Complete any additional tests required to verify compliance with local codes and
standards.