Alliance Laundry Systems Stacked Drying Tumbler Individual Venting, Combined Exhaust Manifold Venting, Collector Venting, EXAMPLE, MAXIMUM LENGTH OF 10 INCHES (25.4 cm)

Installation Instructions

Individual Venting

For maximum efficiency and performance, it is preferred to exhaust tumbler(s) individually to the outdoors. Refer to Figure 1 and 2. AT NO POINT

MAY THE CROSS AREA OF INSTALLED VENTING BE LESS THAN THE CROSS AREA OF THE EXHAUST THIMBLE OF THE TUMBLER.

THE MAXIMUM ALLOWABLE LENGTH OF VENTING IS 14 FEET (4.3 M) AND TWO 90° ELBOWS, OR EQUIVALENT. The table below shows how to determine equivalent length of venting for 90° elbows:

	DUCT DIAMETER	EQUIVALENT LENGTH OF
	DUCT DIAMETER	STRAIGHT DUCT
		STRAIGHT DUCT

	6 in (15.3 cm)	One 90° elbow = 7 ft (2.1 m)

	8 in (20.3 cm)	One 90° elbow = 9.3 ft (2.8 m)

	10 in (25.4 cm)	One 90° elbow = 11.6 ft (3.5 m)

	12 in (30.5 cm)	One 90° elbow = 14 ft (4.3 m)

FORMULA: Equivalent Length (feet or meters) = 1.17 x Duct Diameter (inches or centimeters)

EXAMPLE: A 6 inch diameter duct’s equivalent length of 14 feet of vent and two 90° elbows is:

Equivalent = 14 ft (4.3 m) + (2) 90° elbows
Length:	= 14 ft + 7 ft + 7 ft (4.3 m + 2.1 m + 2.1 m)

	= 28' (8.5 m)

If the equivalent length of a duct required for an installation exceeds the maximum allowable equivalent length, the diameter of a round duct must be increased by 10 percent for each additional 20 feet. The cross area of a rectangular duct must be increased 20% for each additional 20 feet (6.1 m).

With the tumbler in operation, airflow at any point in the duct must be at least 1200 feet (366 m) per minute to ensure that the lint remains airborne.

Combined Exhaust Manifold Venting

The upper and lower units may be exhausted into a combined exhaust manifold, refer to Figure 2. Refer to Figure 3 for proper manifold duct construction. THE

MAXIMUM LENGTH OF 10 INCHES (25.4 cm)

DIAMETER EXHAUST DUCT BEYOND THE MANIFOLD DUCT IS 14 FEET (4.3 m) AND TWO 90° ELBOWS, OR EQUIVALENT.

Collector Venting

While it is preferable to exhaust tumblers individually to the outdoors, a main collector duct may be used if it is sized according to Figure 4. These illustrations indicate minimum diameters, and should be increased if the collector length exceeds 20 feet (6.1 m). The collector duct may be rectangular in cross section, as long as the area is not reduced. Provisions should be made for lint removal and cleaning of the collector duct.

The collector duct must be tapered, as shown in Figures 4 and 5. The individual tumbler ducts must enter the collector duct at a 45° angle in the direction of airflow. Never connect a tumbler duct at a 90° angle to the collector duct. Doing so will cause excessive back pressure, resulting in poor performance. Never connect two tumbler exhaust ducts directly across from each other at the point of entry to the collector duct.

The collector system must be designed so the static back pressure measured 12 inches (30.48 cm) from the exhaust thimble does not exceed the maximum allowable pressure specified on the installation sticker on the rear of the tumbler. This must be measured with all tumblers running that are vented into the collector.

M412060