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C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must 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’s 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’s outer top is accept
able, 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’s outer top is required.
NOTE: Allowances must be made for opening the control door.
Dryers may be positioned side wall to side wall. 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). Refer to the illustration on the previous page (page 10) for details.
NOTE: Air considerations are important for proper and efficient operation.
D. FRESH AIR SUPPLY
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of 800 cfm (22.65 cmm) is necessary for each dryer. An unrestricted air entrance from the
outdoors (atmosphere) of a minimum of 1-1/2 square feet (0.14 square meters) is required for each dryer. This
area must be enlarged if louvers or registers cover the opening. It is not necessary to have a separate make-up
air opening for each dryer. Common make-up air openings are acceptable. However, they must be set up in
such a manner that the make-up air is distributed equally to the dryers. For example, for a bank of eight (8)
dryers, a total make-up air opening of 12 square feet (3.66 square meters) is required. Two (2) openings
measuring 2 feet by 3 feet (0.61 by 0.92 meters) - 6 square feet (0.56 square meters) - are acceptable. (Refer to
the illustration on page 12.)
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low-pressure areas.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes.
Make-up air that is contaminated by dry cleaning solvent fumes will result in
irreparable damage to the motors and other dryer components.