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113430-10 Telephone: (641) 787-7000 15
NUMBER OF DRYERS 4 3 2 1
MINIMUM CROSS-
SECTIONAL AREA
SQ IN 120 120 80 54
SQ CM 774.2 774.2 516.1 348.4
MINIMUM ROUND
DUCT DIAMETER
IN 12 12 10 8
CM 30.48 30.48 25.4 20.32
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.
!
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.
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)
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.
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NUMBER OF DRYERS 4 3 2 1
MINIMUM CROSS-
SECTIONAL AREA
SQ IN 120 120 80 54
SQ CM 774.2 774.2 516.1 348.4
MINIMUM ROUND
DUCT DIAMETER
IN 12 12 10 8
CM 30.48 30.48 25.4 20.32
Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
525 cfm (14.87 cmm) Exhaust Connections at Common Duct
MDG51
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-
SECTIONAL AREA
SQ IN 80 80 54 30
SQ CM 516.1 516.1 348.4 193.55
MINIMUM ROUND
DUCT DIAMETER
IN 10 10 8 6
CM 25.4 25.4 20.32 15.24
MDG31
Multiple Dryer Venting with 6-Inch (15.24 cm) Diameter
360 cfm (10.19 cmm) Exhaust Connections at Common Duct