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8 JLA Limited 113376-4
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) measuring a minimum size of 22-inches by
25-inches (55.9 cm by 63.5 cm) is required for each dryer.
(Based on 1 square inch per 1,000 Btu.)
A = 34.3-inches (87.2 cm) B = 35-inches (88.9 cm)
To compensate for the use of registers or louvers used over
the openings, this area must be increased by approximately
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.
EXAMPLE: For a bank of 4 dryers, 2 unrestricted openings
measuring 34.3-inches by 35-inches (87.2 cm by 88.9 cm)
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.
Dryer Enclosure Requirements _______
Even though a 12-inch (30.48 cm) clearance is acceptable,
it is recommended that the rear of the dryer be positioned
approximately 24-inches (60.96 cm) from the 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 (10.16 cm) and must not extend more than 4-inches
(10.16 cm) to the rear of the front. A 2-inch (5.08 cm)
clearance is required between the bulkhead facing and the
top of the dryer.
Note
Bulkhead facing should not be installed until after
the dryer is in place. Ceiling area must be located
a minimum of 12-inches (30.48 cm) above the dryer top
console (module) and 18-inches (45.72 cm) for steam
models.
A 30-inches (76.2 cm) for optimum opening of load door.
B The 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.
C For gas and 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.
D Dryer should be positioned 12-inches (30.48 cm) away from the nearest
obstruction and 24-inches (60.96 cm) is recommended for ease of
installation, maintenance, and service.
E 2-inch (5.08 cm) minimum is required for opening the control door.
F Flooring should be level or below dryer cabinet for ease of removing panels
during maintenance.
G Dryers 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.
Note
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 sidewall to sidewall, however, 1 or 2-inches
(2.54 or 5.08 cm) is suggested for ease of installation and
maintenance. Allowances must be made for the opening
and closing of the control door and the lint door.
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