American Dryer Corp. 30 lb. Stacked Models - Manual (Page 9)

DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made
of noncombustible materials and must be
located a minimum of six (6) inches 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 six (6)
inches above the dryer outer top is
acceptable, a clearance of 18 inches (or
more) is suggested for ease of installation
and service (electrical connections).
When fire sprinkler systems are located
above the dryers, a minimum of 12 inches
above the dryer outer top is required.
CLEARANCES SHOWN ARE MINIMUM DIMENSIONS TO NEAREST COMBUSTIBLE MATERIALS.
NOTES:
A. Minimum of 6" clearance is acceptable for ease of installation and service
(Power connections), at least 18" is recommended.
B. Minimum of 6" clearance is acceptable for ease of installation, maintenance
and service, at least 24" is recommended.
FRESH AIR SUPPLY
Air supply (make-up air) must be given
careful consideration to assure proper
and safe performance of each dryer. An
unrestricted source of air of 800 cfm is
necessary for each dryer. An unrestricted
air
entrance from the outdoors
(atmosphere) of a minimum of 1-1/2 sq. ft.
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 sq. ft. is
required. Two (2) openings measuring 2 ft.
X 3 ft. (6 sq. ft.) are acceptable.
Allowances must be made for remote or
constricting passageways or where dryers
are
located at excessive altitudes or
predominantly low pressure areas.