User Manual

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Siemens Building Technologies
Cerberus Division
01.2002
4.2.3 Clean room type B, 3
rd
example
A cleanroom with air circulation fans installed in the dropped ceiling connecting the supply-
air plenum (dropped ceiling) at the top and the return-air plenum (raised floor) at the bot-
tom.
22m
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A
A
Dropped ceiling Height 1.95m
Cleanroom 2
nd
floor Height: 3.4m
Raised floor Height 0.55m
Air handling system
Air circulation fans: 500 units
Output per unit: 800m
3
/h
Total output: 410,000m
3
/h
Siting: in the dropped ceiling
Fig. 9 Cross-section through the clean room type B
AD2
HSD
12 air sampling holes
each tube, spacing 0.65m
Raised floor (air return
area, height 0.55m)
0.3m
View A – A
(BDH2450.1)
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Next
AD2
system
Next
AD2
system
Fig. 10 High sensitivity air sampling smoke detection system in raised floor