Exhaust Requirements; Layout; Make-Up Air; Venting - IPSO TMB1268C Planning Manual

Exhaust Requirements

WARNING
A drying tumble dryer produces
combustible lint. To reduce the risk of fire,
the tumble dryer must be exhausted to the
outdoors.
To reduce the risk of fire and accumulation
of combustible gases, DO NOT exhaust
tumble dryer 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.

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. Elbows and long
vents tend to increase drying time. Construction must
not block the airflow at the rear of the tumbler. Doing
so would prevent adequate air supply to the tumbler's
combustion chamber.

Make-Up Air

A tumbler is forced air exhausted and requires
provisions for make-up air to replace the air exhausted
by the tumbler.
IMPORTANT: Do not obstruct the flow of
combustion and ventilation air.
Make-up air openings should be as close to the
tumbler(s) as possible.
The required make-up air opening to the outside for
each tumbler is:
Required Make-Up Air Opening
(to the outside) for Each Tumbler
Models
120 Pound
170 Pound
Table 1
Make-up air openings with louvers will restrict
airflow. The opening must be increased to compensate
for area taken up by louvers.
3-09-71
W057R1
W059R1
Opening
2 2
360 in. (2323 cm )
free air
2 2
525 in. (3710 cm )
free air
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Make-up air openings for a room 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 the tumbler(s), increase the area of the
ductwork by 25% to compensate for any restriction in
air movement.

Venting

WARNING
To reduce the risk of fire due to increased
static pressure, we do not recommend
installation of in-line secondary lint filters
or lint collectors. If secondary systems are
mandated, frequently clean the system to
assure safe operation.
IMPORTANT: Installing in-line filters or lint
collectors will cause increased static pressure.
Failure to maintain the secondary lint system will
decrease tumbler efficiency and may void machine
warranty.
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, thin foil or Type B
flexible ducts – rigid metal ducts are recommended.
Use exhaust ducts made of sheet metal or other
noncombustible material. DO NOT use sheet metal
screws or fasteners on exhaust pipe joints which
extend into the duct and catch lint. Use of duct tape or
pop-rivets on all seams and joints is recommended, if
allowed by local codes.
Verify that old ducts are thoroughly cleaned out before
installing new tumbler(s).
WARNING
Improperly sized or assembled ductwork
causes excess back pressure which
results in slow drying, lint collecting in the
duct, lint blowing back into the room, and
increased fire hazard.
Tumblers – 120 and 170
W749
W355
12