ALLIANCE JC50CG Specifications download pdf (Page 31)

70256801

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

(928 cm

)

75 Pound 195 in

(1258 cm

)

634 250 in

(1613 cm

)

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

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ALLIANCE JC50CG Specifications Page 31

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