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9. The dryer must be installed with a proper exhaust duct connection to the outside.
10. The dryer must be installed with provisions for adequate combustion and make-up air supply.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every 6
months, inspect the exhaust ducting and remove any lint build up.
IMPORTANT: Dryer must be installed in a location/environment, which the ambient
temperature remains between 40º F (4.44º C) and 130º F (54.44º C).
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and should be located a minimum of
12-inches (30.48 cm) (18-inches [45.72 cm] or more is recommended for ease of installation, maintenance, and
service) above the dryer outer top, except along the front of the dryer which may be closed in if desired.
NOTE: Even though a minimum of 12-inches (30.48 cm) above the dryer outer top is acceptable, a
clearance of 18-inches (45.72 cm) or more is suggested for ease of installation and service
(electrical power connections).
NOTE: When fire sprinkler systems are located above the dryers, a minimum of 12-inches (30.48 cm)
above the dryer outer top is required.
NOTE: Allowances must be made for opening the control door.
Dryers may be positioned sidewall to sidewall. However, allowances must be made for opening and closing of
the control door and the lint door. It is suggested that the dryer be positioned about 2 feet (0.61 meters) away
from the nearest obstruction for ease of installation, maintenance, and service (to be measured from the back
guard).
NOTE: Air considerations are important for proper and efficient operation.
D. FRESH AIR SUPPLY REQUIREMENTS
When the dryer is operating, it draws in room air, heats it, passes this air through the basket (tumbler), and
exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the
make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and
sail switch “fluttering” problems may result, as well as premature motor failure from overheating.
Air supply (make-up air) must be given careful consideration to assure proper and safe performance of each
dryer. An unrestricted source of air (550 cfm [15.58 cmm]) is necessary for each basket (tumbler). An
unrestricted air entrance from the outdoors (atmosphere) of a minimum of 2 square feet (0.19 square meters) is
required for each dryer. This area must be enlarged if louvers or registers cover the opening.
To compensate for the use of registers or louvers used over the openings, this make-up air must be increased by
approximately thirty-three percent (33%). Make-up air openings should not be located in an area directly near
where exhaust vents exit the building.