Edwards LaserSense Nano User Manual

Chapter 2: Installation and configuration
LaserSense Nano Aspirating Smoke Detector Installers Handbook 15
Return air grill sampling method
Return air grill sampling systems are designed with sampling pipes centered in
the front of the return air grill. Sampling holes should be spaced so that a minimum
of three holes are used for each grill. Larger grills require more sampling holes.
The sampling holes should be in the direction of the airflow with an end cap.
When using the air grill sampling without another sampling method, the smoke-
detection system will be ineffective when the ventilation system is inoperative. If
this method is being used as the primary smoke detection system, the grill should
be monitored for stoppage of airflow.
Figure 7 below shows a typical mounting to stand sampling pipe away from high
velocity low pressure air at the entrance to the return air grill.
Figure 7: Return air grill sampling method
(1) Air flow
(2) Self tapping screws
(3) Return air grill
(4) Standoff post
(5) Sampling holes

Edwards LaserSense Nano Specifications

General

Brand	Edwards
Model	LaserSense Nano
Category	Smoke Alarm
Language	English