American Dryer Corp MDG31, MDG77 manual Electrical Information, Electrical Requirements

Important

!No more than 4 dryers should be connected to 1 main common duct.

The illustration below shows the minimum cross-sectional area for multiple dryer round or square venting. These figures must be increased if the main duct run from the last dryer to where it exhausts to the outdoors is longer than 12 feet (3.66 meters) or has more than 1 elbow in it.

A = MDG31 6-inch (15.24 cm)

MDG51 8-inch (20.32 cm)

MDG77 8-inch (20.32 cm)

B = 12 feet (3.66 meters)

NOTE 1 Opening from combustible materials must be 2-inches (5.08 cm) larger than the duct (all the way around). The duct must be centered within this opening.

NOTE 2 Distance should be 2 times the diameter of the duct to the nearest obstruction.

Multiple Dryer Venting with 6-Inch (15.24 cm) Diameter

360 cfm (10.19 cmm) Exhaust Connections at Common Duct

MDG31		NUMBER OF DRYERS		4	3	2	1
		MINIMUM CROSS-	SQ IN	80	80	54	30
		SECTIONAL AREA	SQ CM	516.1	516.1	348.4	193.55
		MINIMUM ROUND	IN	10	10	8	6
		DUCT DIAMETER	CM	25.4	25.4	20.32	15.24
		Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
		525 cfm (14.87 cmm) Exhaust Connections at Common Duct
	MDG51	NUMBER OF DRYERS		4	3	2	1
		MINIMUM CROSS-	SQ IN	120	120	80	54
		SECTIONAL AREA	SQ CM	774.2	774.2	516.1	348.4
		MINIMUM ROUND	IN	12	12	10	8
		DUCT DIAMETER	CM	30.48	30.48	25.4	20.32
		Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
		560 cfm (15.86 cmm) Exhaust Connections at Common Duct
	MDG77	NUMBER OF DRYERS		4	3	2	1
		MINIMUM CROSS-	SQ IN	120	120	80	54
		SECTIONAL AREA	SQ CM	774.2	774.2	516.1	348.4
		MINIMUM ROUND	IN	12	12	10	8
		DUCT DIAMETER	CM	30.48	30.48	25.4	20.32

Electrical Information _________________

Electrical Requirements

All electrical connections must be made by a properly licensed and competent electrician. This is to ensure that the electrical installation is adequate and conforms to local, state, and national regulations or codes of the country of origin. In the absence of such codes, all electrical connections, materials, and workmanship must conform to the applicable requirements of the National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION or in Canada, the Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.

Important

!Failure to comply with these codes or ordinances, and/or the requirements stipulated in this manual

can result in personal injury or component failure.

Note

!Component failure due to improper installation will void the warranty.

Each dryer should be connected to an independently protected branch circuit. The dryer must be connected with copper wire only. Do not use aluminum wire, which could cause a fire hazard. The copper conductor wire/cable must be of proper ampacity and insulation in accordance with electric codes for making all service connections.

Note

!The use of aluminum wire will void the warranty.

An individual ground circuit must be provided to each dryer, do not daisy chain.

Component failure due to improper voltage application will void the warranty.

The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

Important

!A separate protected circuit must be provided to each dryer.

The dryer must be connected to the electric supply shown on the data label. In the case of 208 VAC or 240 VAC, the supply voltage must match the electric service specifications of the data label exactly.

Important

!The wire size must be properly sized to handle the related current.

Warning

!208 VAC and 240 VAC are not the same. Any

damage done to dryer components due to improper voltage connections will automatically void the warranty.

113430 - 9 Telephone: (641) 787-7000 15