American Dryer Corp. T20 - Manual (Page 13)

113428-9 Telephone 01422 822282 13
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 (3.656 meters)
or has more than 1 elbow in it.
Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
460 cfm (13.03 cmm) Exhaust Connections at Common Duct
Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
720 cfm (20.39 cmm) Exhaust Connections at Common Duct
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.
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.
A = 8-inches (20.32 cm)
B = 12 feet (3.656 meters)
NUMBER OF DRYERS 4 3 2 1
MINIMUM CROSS-
SECTIONAL AREA
SQ IN 120 80 80 54
SQ CM 774.2 516.1 516.1 348.4
MINIMUM ROUND
DUCT DIAMETER IN 12 10 10 8
CM 30.48 25.4 25.4 20.32
T20 Stack
NUMBER OF DRYERS 4 3 2 1
MINIMUM CROSS-
SECTIONAL AREA
SQ IN 164 120 80 54
SQ CM 1058 774.2 516.1 348.4
MINIMUM ROUND
DUCT DIAMETER IN 14 12 10 8
CM 35.56 30.48 25.4 20.32
T30 Stack
Note
Component failure due to improper installation will
void the warranty.
Each pocket 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 pocket, 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 pocket.
It is necessary to have a power disconnect for each pocket.
These disconnects must be located within 9 meters of the
unit and also be identified as being one of two power
sources supplying a 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.
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.
Warning (Gas Models Only)
Dryers built for use with a voltage between 200 and
240 must verify the input voltage during installation.
If the nominal voltage is outside of the medium tolerances
shown on the diagram below, adjust the autotransformers,
located near the burner assemblies. To adjust the
autotransformer wiring, place the red wire on the
appropriate tap (HIGH, MED, LOW) of the autotransformer.
For additional wiring details, refer to the electrical diagram
located on the inside of the control panel.
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TERM
LINE VOLTAGE
50 Hz 60 Hz
HIGH
260
226 283
249
MED
239
208 260
230
LOW
217
189 236
208
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