Fisher and Paykel DE7027G1 User Guide - Page 30

Exhaust system setup, Hood or wall cap, Separation of turns, Turns other than 90°

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28 Installation instructions Exhaust system setup Hood or wall cap ■■ Ensure the exhaust duct ends with a vent hood with a swing out damper to prevent back drafts and entry of wildlife. ■■ Ensure there is minimal resistance to the exhaust airflow. The structure should also require little or no maintenance to prevent clogging. ■■ Never place a screen in or over the duct. ■■ The vent hood should have at least 12" (305 mm) clearance between the bottom of the hood and the ground or other obstruction. ■■ The hood or wall cap should point downward. 12" min. (305 mm) 12" min. (305 mm) Fig.18 Exhaust hood installation Separation of turns ■■ Separate all turns by at least 4 feet (1.2 m) of straight ducting (including the distance between the last turn and the wall cap) to ensure the best performance of the dryer. Turns other than 90° ■■ One turn of 45° or less may be ignored. ■■ Two 45° turns are to be considered equal to one 90° turn. ■■ Each turn greater than 45° should be considered as equal to one 90° turn. Important! ■■ Choose a route that will provide the straightest and most direct path to the outdoors. Plan the installation to use the fewest number of elbows and turns as possible. ■■ When using elbows (rigid duct) or making turns (thick wall flexible metal duct), allow as much room as possible. Bend thick wall flexible metal duct gradually to avoid kinking, and avoid 90° turns using this material. Recommended Acceptable Fig.19 Duct configurations

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Installation instructions
28
Exhaust system setup
Hood or wall cap
■
±
Ensure the exhaust duct ends with a vent hood
with a swing out damper to prevent back drafts
and entry of wildlife.
■
±
Ensure there is minimal resistance to the exhaust
airflow. The structure should also require little or
no maintenance to prevent clogging.
■
±
Never place a screen in or over the duct.
■
±
The vent hood should have at least 12” (305 mm)
clearance between the bottom of the hood and
the ground or other obstruction.
■
±
The hood or wall cap should point downward.
Separation of turns
■
±
Separate all turns by at least 4 feet (1.2 m) of straight ducting (including the distance between
the last turn and the wall cap) to ensure the best performance of the dryer.
Turns other than 90°
■
±
One turn of 45
°
or less may be ignored.
■
±
Two 45
°
turns are to be considered equal to one 90
°
turn.
■
±
Each turn greater than 45
°
should be considered as equal to one 90
°
turn.
Important!
■
±
Choose a route that will provide the straightest and most direct path to the outdoors. Plan the
installation to use the fewest number of elbows and turns as possible.
■
±
When using elbows (rigid duct) or making turns (thick wall flexible metal duct), allow as much
room as possible. Bend thick wall flexible metal duct gradually to avoid kinking, and avoid
90
°
 turns using this material.
Recommended
Acceptable
Fig.19 Duct configurations
12” min.
(305 mm)
12” min.
(305 mm)
Fig.18 Exhaust hood installation