Installing the pipe system
Installation & Commissioning Handbook, ,
P-ASENSE75/IE 980302, 7483 Trondheim
Page 13
3.3 Installing the pipe system in the roof/ceiling
To cover a fire zone in a room, the exhaust/suction pipes should be
located either directly under the ceiling panels or with a maximum
distance of 100 mm to the panels, and laid out in one, two, three or
four runs to cover the whole zone area.
For ceiling/roof installations, the sampling holes should be 25 mm,
but not more than 100 mm, below the ceiling/roof, and should point
downwards into the room. This design ensures that the holes are
below the thin layer of warm air that usually forms under ceilings in
heated rooms or under real fire conditions, and which causes smoke to
layer.
From a point of view of installation and maintenance, the most
effective way of fixing pipes in a ceiling/roof is with standard pipe
fixing clips designed to fit the external diameter (OD) of the pipes.
3.4 Pipe joints
All joints should be glued.
3.5 Cleaning out the pipe system following installation
Following installation the pipe system should be thoroughly cleaned
out by, for example, by drawing a rag through the pipes attached to a
length of wire.
The system can also be cleaned out by removing the end plug and
using an air pressure hose in the opposite direction to the normal air
flow i motsatt retning av normal luftstrøm.
