Speed Queen Drying Tumblers none - Manual (Page 31)

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Exhaust Requirements
Layout
Whenever possible, install tumblers along an outside
wall where duct length can be kept to a minimum, and
make-up air can be easily accessed. Construction must
not block the airflow at the rear of the tumbler. Doing
so would prevent adequate air supply to the tumbler
combustion chamber.
Make-Up Air
A tumbler is forced air exhausted and requires provisions
for make-up air to replace air exhausted by tumbler.
Refer to Table 6.
IMPORTANT: Do not obstruct flow of combustion
and ventilation air.
Table 6
Make-up air openings with louvers will restrict
airflow. The opening must be increased to compensate
for area taken up by louvers.
Make-up air openings in rooms containing tumbler(s)
and/or gas fired hot water heater or other gravity vented
appliances must be increased sufficiently to prevent
downdrafts in any of the vents when all tumblers are in
operation. Do not locate gravity vented appliances
between tumbler(s) and make-up air openings. If it is
necessary to duct make-up air to tumbler(s), increase
area of ductwork by 25% to compensate for
restrictions in airflow.
Venting
For maximum efficiency and minimum lint
accumulation, tumbler air must be exhausted to the
outdoors by the shortest possible route.
Proper sized exhaust ducts are essential for proper
operation. All elbows should be sweep type. Exhaust
ducts must be assembled so the interior surfaces are
smooth, so the joints do not permit the accumulation
of lint. DO NOT use plastic or thin foil flexible ducts.
Use exhaust ducts made of sheet metal or other
noncombustible material. Use duct tape on all joints.
Verify that old ducts are thoroughly cleaned out before
installing new tumbler.
Improperly sized or assembled ductwork causes
excess back pressure which results in slow drying, lint
collecting in the duct, lint blowing into the room, and
increased fire hazard.
Exhaust ducts shall be constructed of sheet metal
or other noncombustible material. Such ducts must
be equivalent in strength and corrosion resistance
to ducts made of galvanized sheet steel not less than
0.0195 inches (0.495 mm) thick.
Where the exhaust duct pierces a combustible wall,
ceiling, floor or partition an opening having a diameter
of 4 inches (102 mm) larger than the diameter of the
exhaust duct shall be provided, with the duct centered
in the opening. The space around the duct may be
sealed with noncombustible material. Refer to Figure 10.
IMPORTANT: For best performance provide an
individual exhaust duct for each tumbler. Do not
install a hot water heater in a room containing
tumblers. It is better to have the water heater in a
separate room with a separate air inlet.
Required Make-Up Air Opening
(to the outside) for Each Tumbler
Model Opening
50 Pound 144 in
2
(928 cm
2
)
75 Pound 195 in 2 (1258 cm 2 )
634 250 in
2
(1613 cm
2
)
WARNING
A drying tumbler produces combustible
lint. To reduce the risk of fire, the tumbler
must be exhausted to the outdoors.
W057
To reduce the risk of fire and
accumulation of combustible gases, DO
NOT exhaust tumbler air into a window
well, gas vent, chimney or enclosed,
unventilated area such as an attic wall,
ceiling, crawl space under a building, or
concealed space of a building.
W059