Apollo Fire Detectors
Discovery ASD-1 Product Guide
www.apollo-fire.co.uk
11
4
Pipe Installation
This section provides a simple guide to pipe installation and should contain all the information required for
simple installations based on the standard configurations shown in Section 4.7.
More information on achieving an EN54-20 compliant pipe installation can be found in Chapter 8.
Use appropriate pipe with a sampling point hole drilled along it's length. The pipe run is terminated by a closed
end cap unless the end cap is the sampling point. The position of the sampling point should be in the
accordance with the rules for the positioning of a point detector.
4.1
Pipe Specification
For EN54-20 compliance, the pipe should be Red ABS to EN 61386-1: 2004 (Crush 1, Impact 1, Temp 31)
with a nominal diameter of 25 mm (or 0.98 in.). The sample pipe is normally supplied in 3 m lengths and is cut
as required and joined by solvent welded sockets (permanent), or socket unions (removable).
Note:
The Discovery ASD-1 inlet port is tapered to allow a push fit of the sampling pipe. The pipe should
be cut squarely to ensure a good, airtight seal. Solvent adhesive should not be used for this joint.
4.2
Fixings
The normal fixing methods are pipe clips, saddle clamps or even tie wraps. Fixing centers are typically 1.5 m
(4.9 ft) apart.
4.3
End Cap with Sampling Hole
A
B
Legend
A
End Cap
B
8mm Sampling Hole
Figure 4-1: End cap with 8mm hole drilled in center
4.4
Bends
Figure 4-2: 45° bend and 90° swept bend
Bends are either 45° or 90°. For 90° bends, it is important that swept bends are used and not sharp elbows, as
this will introduce unnecessary pressure losses, and increase the response times from holes beyond the
bend.
Summary of Contents for 29650-081
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