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14
The outside end of main vent should have a sweep elbow
directed downward.
If main vent travels vertically through the roof, rather than
through wall, install a 180° sweep elbow on end of vent at least
2 ft. (610 mm) above surface of roof.
The opening in wall or roof shall have a diameter 1⁄2" (13 mm)
larger than vent diameter. Vent should be centered in opening.
Do not install screening over end of vent for best performance.
12" min.
(305 mm)*
A main vent can be used for venting a group of dryers. The
main vent should be sized to remove 5663 l/min. (200 CFM)
of air per dryer. Large-capacity lint screens of proper design
may be used in main vent if checked and cleaned frequently.
The room where the dryers are located should have make-up
air equal to or greater than CFM of all the dryers in the room.
Back-draft Damper Kit, Part No. 3391910, is available from
your distributor and should be installed in the vent of each
dryer to keep exhausted air from returning into dryers and to
keep exhaust in balance within main vent. Unobstructed return
air openings are required.
Each vent should enter the main vent at an angle pointing in
the direction of the airow. Vents entering from the opposite
side should be staggered to reduce the exhausted air from
interfering with the other vents.
The maximum angle of each vent entering the main vent should
be no more than 30°.
Keep air openings free of dry cleaning uid fumes. Fumes
create acids which, when drawn through the dryer heating
units, can damage dryers and items being dried.
A clean-out cover should be located on the main vent for
periodic cleaning of the vent system.
If an Exhaust Hood Cannot be Used Multiple Dryer Venting
DRYER VENTING REQUIREMENTS
24" min.
(610 mm)
* Minimum clearance above
any accumulation of snow,
ice, or debris such as leaves
1. Remove red cap from gas pipe on back of dryer.
2. Connect gas supply to dryer. Use a pipe thread compound
approved for the type of gas supplied. If exible metal
tubing is used, be certain there are no kinks.
If necessary for service, open the toe panel. Use a putty
knife to press on the toe panel locks located at the upper
corners of the toe panel. Pull downward on the toe panel
to open. Toe panel is hinged at the bottom.
3. Open the shut-off valve in the gas supply line and make sure
the dryer has its own gas supply opened.
4. Test all connections by brushing on an approved
noncorrosive leak-detection solution. Bubbles will show
a leak. Correct any leaks found.
Make Gas Connection
GAS SUPPLY CONNECTION
30˚ max.
air ow
Air Flow
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