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Example 2
Common combined exhaust ducting for multiple appliances should only be considered as
a solution in exceptional cases.
Configuring combined exhaust ducting made from steel for the PDR 914/514 and PDR
918/518 series tumble dryers:
L1–L4
each 6' 6" (2 m) steel piping
B1–B3
each 90° concertina pipe elbow (r = 2d)
B4
45° elbow (r = 2d)
B5
90° elbow (r = d)
If the exhaust from multiple appliances is to be ducted into a combined line, a non-return
device must be installed in each separate line to prevent backflow.
B2
L1
B1
PDR 914/514
1. Total pipe length PDR 914/514
Steel pipe
Steel pipe
Steel pipe
90° concertina pipe elbow
(r = 2d)
90° concertina pipe elbow
(r = 2d)
90° elbow (r = d)
Total duct length
* Substitute pipe lengths according to Table 1
L2
B4
L3
B3
PDR 918/518
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)*
B5 = 6' 3" (1.9 m)*
en - Installation notes
L4
B5
46' 11" (14.3 m)
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