Chapter 3: Commissioning
LaserSense Nano Aspirating Smoke Detector Installers Handbook 29
4. The detector automatically performs a FastLearn cycle which takes
approximately 15 minutes. The OK indicator on the front panel will begin to
flash. When using day/night switching, check that day start and night start
settings reflect site operations.
5. The detector will generate no alarms during the 15 minute FastLearn period
and, after this, the detector will operate at a reduced sensitivity for 24 hours
while ClassiFire learns and acclimates to the protected environment and sets up
appropriate day and night sensitivity settings.
6. Reconnect the detector to the fire control unit, if applicable
Acclimation period
The detector will operate at a reduced sensitivity for 24 hours. ClassiFire will set
up the appropriate day and night sensitivity settings. All air handling units,
thermostats, and other systems that can have an effect on the operating
environment should be turned on to simulate normal operating conditions as
closely as possible. Investigate and correct any condition that cannot be
accounted for.
Transport time verification
A maximum transport time verification test measures the amount of time it takes
for the detector to respond to smoke that enters the sampling point furthest from
the detector. The results of this test and the calculated maximum transport time
from PipeCAD must be recorded on the checklist if applicable. Measured
transport time less than the calculated time is acceptable.
For EN-54 compliance, the transport time of the last sampling hole must be
checked following installation and proven to be less than or equal to the value
determined by PipeCAD.
To measure the maximum transport time of the system:
1. Determine the furthest sampling point from the detector.
2. Allow test smoke to enter pipe at the furthest sampling point.
3. Record the amount of time for the detector to respond. This is the actual
maximum transport time. This time must not exceed 120 seconds.
Gross smoke test
The gross smoke test is a measurement of the amount of time elapsing from the
activation of the smoke generating medium, until PRE-ALARM and ALARM
states are reached. This test should be repeated at least three times with
consistent results. The recommended smoke generating medium is canned
smoke or a wire burner. Smoke from a punk or cotton wick is also acceptable.
To Next Page
Loading...
Need help?
General
