13
IMPORTANT:
When fire sprinkler systems are located above the dryers, a minimum of 18-inches
(45.72 cm) above the dryer console (module) is required. Dryers may be positioned
side wall to side wall, however, a 1/16 (1.5875 mm) minimum allowance is required
between dryers (or wall) for ease of installation and maintenance. Allowances
must
be
made for the opening and closings of the control door and the lint door.
D. FRESH AIR SUPPLY
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 performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 1,700 cfm (cubic feet per minute) - 48.14
cmm (cubic meters per minute) -
must be
supplied to each gas and electric dryer and 2,500 cfm (70.79 cmm)
must be
supplied to each steam dryer. As a general rule, an unrestricted air entrance from the outdoors
(atmosphere) of a minimum of 2-1/2 square feet (0.23 square meters) is required for each dryer.
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.
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