GE GTDS855GDMC Installation Instructions Manual page 6

6 EXHAUST INFORMATION
NORMAL VENT
RECOMMENDED MAXIMUM LENGTH
Recommended
4" DIA.
4"
No. of 90 º Rigid
Elb ows Metal
0 90 Feet
1 60 Feet
2 45 Feet
35 Feet
3
4 25 Feet
LONG VENT
RECOMMENDED MAXIMUM LENGTH
Recommended
4" DIA.
4"
No. of 90 º Rigid
Elb ows Metal
0 150 Feet
1 135 Feet
2 125 Feet
115 Feet
3
105 Feet
4
5 95 Feet
ONLY THESE MODELS
GTDL740EDWW
GTDL740GDWW
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).
Installation Instructions
(cont.)
EXHAUST LENGTH
Exhaust Hood Types
Use only for sho rt
run installations
4" DIA.
4" DIA.
2-1/2"
Rigid
Metal
60 Feet
45 Feet
35 Feet
25 Feet
15 Feet
EXHAUST LENGTH
Exhaust Hood Types
Use only for sho rt
run installations
4" DIA.
4" DIA.
2-1/2"
Rigid
Metal
125 Feet
115 Feet
105 Feet
95 Feet
85 Feet
75 Feet
7
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
air flow and should require little or no maintenace to prevent clogging
Never install a screen in or over the exhaust duct. This could
cause lint build up.
Wall caps must be installed at least 12 in. 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 distance between last turn and 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.
The duct shall not be assembled with screws or other
fastening means that extend into the duct and catch 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 inch per foot.
INSULATION
Duct work that runs through an unheated area or is near air
conditioning should be insulated to reduce condensation and
lint build-up.
PARTS AVAILABLE FROM LOCAL SERVICE
ORGANIZATIONS
Rigid Metal Duct Components
WX8X63 4ʺ x 1ʹ Duct
WX8X64 4ʺ x 2ʹ Duct
WX8X51 4ʺ Elbow
WX8X59 4ʺ Aluminum Hood
Flexible Metal Duct Components
WX8X58 4ʺ Clamps (2)
WX8X59 4ʺ Aluminum Hood
WX08X10077 6ʹ UL-Listed, Flexible Metal (Semi-Rigid)
Duct, 2 Clamps, 2 Close Elbows
WE1M454 Cover rear exhaust opening
6