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D. FRESH AIR SUPPLY REQUIREMENTS
Air supply (make-up air) must be given careful consideration to ensure proper performance of each dryer. An
unrestricted source of 1,040 cfm (29.44 cmm) is necessary for each dryer (total for both baskets [tumblers]).
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 (1.15 square
meters) is required. Two (2) openings measuring 2 feet by 3 feet (6 square feet [0.61 meters by 0.91 meters]
[0.58 square meters]) are acceptable. The dryer must be installed with provisions for adequate combustion and
make-up air supply.
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.
IMPORTANT: Make-up air openings should not be located near ductwork exhaust outlets. If
make-up air openings are too close to the exhaust outlet, lint and fumes may be drawn
back into the dryer area through these openings.
NOTE: Component failure due to dry cleaning fumes will VOID THE WARRANTY.