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Mounting
ASD 531, Technical description, T 140 416 en
61 / 105
5.5.11
Mounting sampling stubs for a ceiling bushing
Possible only with plastic tubes (PVC/ABS)!
The parts required for a sampling stub for a ceiling bushing
duct are shown in
A T-piece is built into the sampling pipe at the required point.
The assembly sequence is carried out as indicated by the
numbering
1
to
8
.
The sampling hole size (8) is selected based on the specifica-
tion in Sec. 4.4.4.3 and/or the specifications of the “ASD Pipe-
Flow” calculation software.
Warning
Make sure the interfaces of the flexible tube are
implemented “cleanly” so that the sealing ring in
the quick-release coupling is not damaged.
When clicking the flexible tube into place, make
sure the tube and the quick-release coupling are
pressed firmly against each other to prevent the
intake of any leakage air.
The maximum length of the flexible tube must not
exceed
1.5 m
.
Fig. 28 Mounting the ceiling bushing
Flexible tube
Ø 16/21 mm
Length max. 1,5 m
Sampling
tube
False ceiling
Sampling hole
T-piece
M20 threaded ring
M20 quick-release
coupling
M20 quick-release
coupling
Sampling point /
M20 ceiling duct
1
8
2
3
5
6
7
4
M25 threaded ring