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E. FRESH AIR SUPPLY REQUIREMENTS
When the dryer is operating, it draws in room air, heats 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 make-up air is
inadequate, drying time and efficiency
will be adversely affected, and safety will be compromised. Premature
component failure may result.
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 13,000 cfm (368 cmm) must be supplied to
each dryer. As a general rule, an unrestricted air entrance from the outdoors (atmosphere) of a minimum 20
square feet (6.096 square meters) is required for each dryer.
To compensate for the use of registers or louvers used over the openings, the make-up air area 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.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitude or predominantly low pressure areas. The dryer must be installed with provisions for adequate combustion
and make-up air supply.
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.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.
F. EXHAUST REQUIREMENTS
1. General Exhaust Ductwork Information
Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork
will create excessive back pressure, which results in slow drying, increased use of energy, overheating of
the dryer, and shutdown of the burner by the airflow (sail) switches, burner hi-limits, or basket (tumbler)
hi-limit thermostats. The dryer must be installed with a proper exhaust duct connection to the outside.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN
CREATE A POTENTIAL FIRE HAZARD.
NOTE: THE DRYER MUST BE INDEPENDENTLY EXHAUSTED. COMMON
DUCTWORK IS NOT ACCEPTABLE.
The exhaust ductwork should be laid out in such a way that the ductwork travels as directly as possible to
the outdoors with as few turns as possible. Single or independent dryer venting is recommended.