Exhaust System; Multi-Dryer Installation Exhaust Requirements - Unimac UDE807F Directives D'installation Et De Fonctionnement

Exhaust System

For best drying results, recommended maximum length of ex-
haust system is shown in Table 2 .
To prevent backdraft when dryer is not in operation, outer end of
exhaust pipe must have a weather hood with hinged dampers (ob-
tain locally).
Number of 90° Elbows
Maximum length of 102 mm [4 in.] diameter rigid metal duct.
0
1
2
3
4
NOTE: Deduct 1.8 m [6 feet] for each additional elbow.
NOTE: The maximum length of a 102 mm [4 in.] diame-
ter flexible metal duct must not exceed 2.4 m [7.87 ft.],
as required to meet UL2158, clause 7.3.2.A.
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Recommended
1
D673I_SVG
1. 102 mm [4 in.]
19.8 m [65 feet]
16.8 m [55 feet]
14.3 m [47 feet]
11.0 m [36 feet]
8.5 m [28 feet]
Table 2
NOTE: Weather hood should be installed at least 305
mm [12 inches] above the ground. Larger clearances
may be necessary for installations where heavy snow-
fall can occur.
Weather Hood Type
Use Only for Short Run Installations
1
1
D802I_SVG
1. 64 mm [2.5 in.]
16.8 m [55 feet]
14.3 m [47 feet]
12.5 m [41 feet]
9.1 m [30 feet]
6.7 m [22 feet]

Multi-Dryer Installation Exhaust Requirements

Figure 6 shows a typical example of a multiple dryer installation.
Note how each dryer has its own exhaust system vented to the
central exhaust duct.
17
Installation
Part No. D512681ENR9