Miele PT 825 Series Installation Instructions Manual page 11

1. Total pipe length, PT 825x
Steel pipe
Steel pipe
Steel pipe
90° concertina pipe elbow
(r = 2d)
90° concertina pipe elbow
(r = 2d)
90° elbow (r = d)
Total pipe length
* Substitute pipe lengths according to Table 1
2. Pipe diameter depending on total pipe length
Total pipe length = 46' 11" (14.3 m)
Maximum permissible total pipe length 62' 4" (19 m) = Ø 6" (150 mm) internal pipe diame-
ter (see Table 2)
3. Total pipe length, PT 833x
Steel pipe
Steel pipe
90° concertina pipe elbow
(r = 2d)
45° elbow (r = 2d)
90° elbow (r = d)
Total pipe length
* Substitute pipe lengths according to Table 1
4. Pipe diameter depending on total pipe length
Total pipe length = 32' 1" (9.8 m) (PT 833x)
Maximum permissible total pipe length 49' 2" (15 m) = Ø 6" (150 mm) internal pipe diame-
ter (see Table 2)
5. Total pipe diameter
According to Table 3
Pipe diameter, PT 825x
Pipe diameter PT 833x
Total cross section A
Total pipe diameter
Supply air, exhaust, and ventilation cross-sections
= 54 13/16"² (354 cm²)
= Ø 8 11/16" (220 mm)
L1 = 6' 6" (2.0 m)
L2 = 6' 6" (2.0 m)
L4 = 6' 6" (2.0 m)
B1 = 10' 6" (3.2 m)*
B2 = 10' 6" (3.2 m)*
B3 = 6' 3" (1.9 m*)
46' 11" (14.3 m)
L3 = 6' 6" (2.0 m)
L4 = 6' 6" (2.0 m)
B3 = 10' 6" (3.2 m)*
B4 = 2' 3" (0.7 m)*
B5 = 6' 2" (1.9 m)*
32' 1" (9.8 m)
Ø 6" (150 mm)
= 27 3/8"² (177 cm²)
Ø 6" (150 mm)
= 27 3/8"² (177 cm²)
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