American Dryer Corp. Gas/HSI & Steam ID-120 - Manual (Page 17)

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C. DRYER ENCLOSURE REQUIREMENTS
Even though a 30-inch (76.2 cm) clearance is acceptable, it is recommended that the rear of the dryer be
positioned approximately 3 feet (0.91 meters) from nearest obstruction (i.e. wall) for ease of installation,
maintenance, and service. Bulkheads and partitions should be made from noncombustible materials. The
clearance between the bulkhead header and the dryer must be a minimum of 4-inches (10.2 cm) and must not
extend more than 4-inches (10.2 cm) to the rear of the dryer front. The bulkhead facing must not be closed in
ALL the way to the top of the dryer. A 2-inch (5.08 cm) clearance is required.
NOTE: Bulkhead facing should not be installed until after dryer is in place. Ceiling area must be
located a minimum of 12-inches (31 cm) above the top of the dryer.
NOTE: When fire sprinkler systems are located above the dryers, a minimum of 18-inches (46 cm)
above the dryer console (module) is suggested. Dryers may be positioned sidewall to sidewall
however, 1 or 2-inches (2.54 or 5.08 cm) is suggested between dryers (or wall) for ease of
installation and maintenance. Allowances must be made for the opening and closing of the
control and lint doors.