Smoke Alarm User Manual

Installation, Operation and Maintenance Manual
Page 4-4 Issue 1
February 2001
Reference should be made to Chapter 5, System Design, for information on the design of the sampling
pipe system. The sample inlet port of the Detector provides a 0.75 inch threaded interface section to the
sampling pipe network. Once installed this will provide an airtight connection.
Before connecting the piping network to the Detector, the piping must be connected to a vacuum cleaner
for several minutes (at the Detector end of the network). This will ensure that any loose debris is
removed from the piping network. While the vacuum is connected, the pipe should be tapped lightly
starting from the furthest pipe segment and moving back towards the vacuum.
If the sampled air must be returned from the Detector to the protected space, an exhaust port adapter
must be used. The optional adapter will push fit into the Detector's exhaust port and provides a threaded
connection to a 1 inch pipe.
Figure 4.1 Detector Installation Diagram