Exhaust requirements, Layout make-up air venting, Warning – IPSO TMB795C User Manual

Page 13

Tumblers – 50 and 75

4-08-44

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. 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:

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 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

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 or thin foil 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 code.
Verify that old ducts are thoroughly cleaned out before

installing new tumbler(s).

Required Make-Up Air Opening

(to the outside) for Each Tumbler

Model

Opening

50 Pound

144 in

(928 cm

)

75 Pound

195 in

(1258 cm

)

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

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.

W749

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.

W355

WARNING