VESDA-E VEA
Commissioning Guide
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Note:
Tube flow scan is only available in VEA firmware 5.30 or above, for previous firmware Flow Scan
is the only mechanism available to do the flow measurement.
It is recommended that each time only one fix is applied per tube to minimize the debugging time.
Tips:
•
High flow values are generally caused due to leakage or shorter tube compared to other tubes. To fix the
high flow follow the steps below and perform Tube Flow Scan for the relevant tubes:
-
Ensure that the inserted length for the tube in the
Module
tab matches the actual length
-
Ensure that the tube end is cut properly at the detector inlet end
-
Ensure that the tube is inserted all the way in to the detector inlet
-
Block the tube completely at the sample point end and ensure zero flow when tube flow scan is
performed
-
Ensure no leakage at any change over point wherever tube connectors are used
•
Low flow values are generally caused due to blockage or longer tube compared to other tubes. To fix the
low flow follow the steps below and perform Tube Flow Scan for the relevant tubes:
-
Ensure that the tube end is cut properly at the detector inlet end
-
Ensure that the tube is not bent or squeezed at any point in its entire length
-
Open the tube completely at the sample point end and ensure higher flow when tube flow scan is
performed
-
Ensure no mishandling at any change over point wherever tube connectors are used
•
It is crucial to do single fix at a time for each tube and then run the Tube Flow Scan, under no
circumstances you should remove all tubes at the same time.
•
If the firmware version is older than 5.30 and has not been upgraded yet, you will need to do a complete
Flow Scan to fix the tube problems.
4. Once all tubes flows are within acceptable range normalize the detector. This process might take 35
minutes.
Note:
This step is done after all tubes have been properly fixed and all flow values are within
acceptable range.
5. Once the detector is normalized, print the flow and pressure by selecting the
detector
Device
Print Flow and Pressure
, save to text file and keep a date-stamped physical copy with the
commissioning records.
4.2
Functional Tests
Before running the following functional tests, make sure that the detector is free from errors.
Refer to the relevant product guide for performing the below tests:
1. Perform
Sampling Point Tests
on all sample points to ensure their correct functioning, replace / repair if
the test fails.
Note:
If a sampling point fails the test it must be rectified first otherwise the fault remains in the detector
till a power cycle is performed.
2. Test the relay using
Start Alarm Test
or
Start Relay Test
commands
3. Test any ancillary device if present.
4. Record results in the commissioning forms
4.3
Smoke Tests
Smoke tests are required to meet the local codes and standards requirement, how VESDA-E VEA meets the
NFPA 72 requirements is described in section 4 of this document.
1. Perform the local smoke test using
Start Local Smoke Test
command and then complete the test using
"Stop Local Smoke Test" command. This test checks the correct functioning of the smoke sensor
module.
2. Perform a transport time test for the longest even and odd tubes by putting abnormal amount of smoke
at their respective sample points and record the transport time when VEA raises a global alarm.
