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D. FRESH AIR SUPPLY REQUIREMENTS
The air supply (make-up air)
must be
given careful consideration to assure proper performance of each dryer.
An unrestricted source of air is necessary for each dryer. As a general rule, 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. If
registers or louvers are installed over the openings, then the area
must be
increased. It is not necessary to have
separate make-up air openings 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. The dryer
must be
installed with provisions for adequate combustion and make-up air supply.
EXAMPLE
: For a bank of eight (8) dryers, two (2) unrestricted openings measuring 3 feet by 2 feet (0.914
meters by 0.61 meters) (6 square feet [0.557 square meters]) are acceptable.
IMPORTANT:
Make-up air openings
should not be
located in an area directly near where exhaust
vents exit the building.
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 contaminating fumes such as 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.
NOTE:
Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.
