Dryer Enclosure Requirements _______
Bulkheads and partitions should be made of noncombustible material.
Note
!Allowances must be made for opening the control door.
AThe optimum opening of load door is 30-inches (76.2 cm) for ADH-75; and 38-1/4” (76.2 cm) for ADH-120 and ADH-170.
BThe maximum thickness of the bulkhead is 4-inches (10.16 cm). For electric dryers the maximum thickness of the bulkhead is 1-inch (2.54 cm) within 3-inches (7.62 cm) from the top of the control door.
CFor electric dryers a minimum overhead clearance of 12-inches (30.48 cm) is required, providing no sprinkler is located above the dryer. For steam dryers or if a sprinkler is located above the dryer, 18-inches (45.72 cm) is required.
DDryer should be positioned 12-inches (30.48 cm) for ADH-75; 24-inches (60.96 cm) for ADH-120 and ADH-170, away from the nearest obstruction and 24-inches (60.96 cm) for ADH-75; 36-inches (91.44 cm) for ADH-120 and ADH-170 is recommended for ease of installation, maintenance, and service.
EFlush to the opening of the control door.
FFlooring should be level or below dryer cabinet for ease of removing panels during maintenance.
GDryers may be positioned sidewall to sidewall, however a 1/16” (1.5875 mm) minimum allowance must be made for the opening and closing of the control door, along with the removal of panels during maintenance.
Fresh Air Supply Requirements _______
When the dryer is operating, it draws in room air, heats it, passes this air through the 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. The dryer must be installed with provisions for adequate combustion and make-up air supply.
Air supply (make-up air) must be given careful consideration to ensure proper performance of 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) ADH-75; 3 square feet (0.28 square meters) ADH-120; 4 square feet (0.37 square meters) ADH-170; is required for each dryer.
ADH-75 | A = 2 ft (0.61 m) | B = 18” (45.72 cm) |
ADH-120 | A = 2 ft (0.61 m) | B = 3 ft (0.91 m) |
ADH-170 | A = 3 ft (0.91 m) | B = 3 ft (0.91 m) |
To compensate for the use of registers or louvers used over the openings, this 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.
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 all the dryers.
ADH-120 EXAMPLE: For a bank of 4 dryers, 2 unrestricted openings measuring 2 feet by 3 feet (0.61 meters by 0.91 meters) are acceptable.
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 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.
