GE PFDS450 Manuel d'utilisateur Page 27

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27
Installation Instructions
EXHAUST SYSTEM CHECKLIST
HOOD OR WALL CAP
Terminate in a manner to prevent back drafts or
entry of birds or other wildlife.
Termination should present minimal resistance
to the exhaust airflow and should require little or
no maintenance to prevent clogging.
Never install a screen in or over the exhaust
duct. This could cause lint buildup.
Wall caps must be installed at least 12” above
ground level or any other obstruction with the
opening pointed down.
SEPARATION OF TURNS
For best performance, separate all turns by at
least 4 ft. of straight duct, including the distance
between the last turn and the exhaust hood.
TURNS OTHER THAN 90º
One turn of 45º or less may be ignored.
Two 45º turns should be treated as one 90º turn.
Each turn over 45º should be treated as one 90º
turn.
SEALING OF JOINTS
All joints should be tight to avoid leaks. The male
end of each section of duct must point away
from the dryer.
Do not assemble the ductwork with fasteners
that extend into the duct. They will serve as a
collection point for lint.
Duct joints can be made air- and moisture-tight
by wrapping the overlapped joints with duct
tape.
Horizontal runs should slope down toward the
outdoors 1/4” per foot.
INSULATION
Ductwork that runs through an unheated area or is
near air conditioning should be insulated to reduce
condensation and lint buildup.
WARNING – USE ONLY METAL 4”
DUCT. DO NOT USE DUCT LONGER THAN
SPECIFIED IN THE EXHAUST LENGTH TABLE.
Using exhaust longer than specified length will:
Increase the drying times and the energy cost.
Reduce the dryer life.
Accumulate lint, creating a potential fire
hazard.
The correct exhaust installation is YOUR
RESPONSIBILITY.
Problems due to incorrect installation are not
covered by the warranty.
The MAXIMUM ALLOWABLE length of the
exhaust system depends upon the type of duct,
number of turns, the type of exhaust hood (wall
cap) and all conditions noted below.
EXHAUST LENGTH
RECOMMENDED MAXIMUM LENGTH
Exhaust Hood Types
Recommended Use only for short- run
installations
No. of 90º Rigid Rigid
Elbows Metal Metal
0 150 Feet 125 Feet
1 135 Feet 115 Feet
2 125 Feet 105 Feet
3 115 Feet 95 Feet
4 105 Feet 85 Feet
5 95 Feet 75 Feet
4
DIA
4
2
1
ø2
4
DIA
4
DIA
For every extra 90° elbow, reduce the allowable vent
system length by 10 ft.
Two 45° elbows will be treated like one 90° elbow.
For the side exhaust installations, add one 90° elbow to
the chart.
The total vent system length includes all the straight
portions and elbows of the system (transition duct
included).
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