ADC AD-120ES, Installation Manual, Page: 18 / 34

18 American Dryer Corp. 113386-28
Electrical Connections
NOTE: A wiring diagram is included with each dryer and is
affixed to the rear upper right guard/panel of the dryer.
Grounding
A ground (earth) connection must be provided and installed
in accordance with state and local codes. In the absence of
these codes, grounding must conform to applicable
requirements of the National Electrical Code ANSI/NFPA NO.
70-LATEST EDITION, or in Canada, the installation must
conform to applicable Canada Standards: Canadian Electrical
Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
The ground connection may be to a proven earth ground at
the location service panel.
NOTE: A grounding connection (terminal lug) is provided in
the dryer’s electrical service/relay box at the rear.
For added personal safety, when possible, it is suggested
that a separate ground wire (sized per local codes) be
connected from the ground connection of the dryer to a
grounded cold water pipe. Do not ground to a gas or hot
water pipe. The grounded cold water pipe must have metal
to metal connections all the way to electrical ground. If there
are any nonmetallic interruptions, such as a meter, pump,
plastic, rubber, or other insulating connectors, they must be
jumped out with no. 4 copper wire and securely clamped to
bare metal at both ends.
IMPORTANT: For personal safety and proper operation, the
dryer must be grounded. For proper operation of the
microprocessor controller (computer), an earth (zero) ground
is required.
NOTE: Grounding via metallic electrical conduit (pipe) is not
recommended.
Gas Information ______________________
It is your responsibility to have all plumbing connections made
by a qualified professional to ensure that the gas plumbing
installation is adequate and conforms to local and state
regulations or codes. In the absence of such codes, all
plumbing connections, materials, and workmanship must
conform to the applicable requirements of the National Fuel
Gas Code ANSI Z223.1-LATEST EDITION, or in Canada, the
Canadian Installation Codes CAN/CGA-B149.1-M91 (Natural
Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST
EDITION.
In Australia, the fuel gas code is AS/NZS5601, local authority,
gas, electricity, and any other relevant statutory regulations.
It is important that gas pressure regulators meet applicable
pressure requirements, and that gas meters be rated for the
total amount of all the appliance Btu being supplied.
IMPORTANT: Failure to comply with these codes or
ordinances, and/or the requirements stipulated in this manual,
can result in personal injury and improper operation of the
dryer.
The dryer and its individual shutoff valves must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa). The dryer must be isolated from the gas
supply piping system by closing its individual manual shutoff
valve during any pressure test of the gas supply system at
test pressures equal to or less than 1/2 psig (3.5 kPa).
IMPORTANT: Failure to isolate or disconnect the dryer from
supply as noted can cause irreparable damage to the gas
valve voiding the warranty.
Fire or explosion could result.
!
WARNING
The only electrical input
connections to the dryer
are the 3-phase (3ø) power
leads (L1, L2, and L3),
GROUND, and in the case
of 4-wire service, the
neutral. Providing local
codes permit, power
connections to the dryer
can be made by the use of
a flexible UL listed cord/
pigtail (wire size must
conform to rating of the
dryer), or the dryer can be
hard wired directly to the service breaker. In all cases, a
strain relief must be used where the wire(s) enters the dryer
electrical service (relay) box.
Gas Model and Steam Model Dryers
These electrical connections are made at the terminal block
located in the electric service/relay box at the rear, upper left
hand corner of the dryer. To gain access into this service
box, the service cover (upper back guard) must be removed.
Electric Model Dryers
For electric model dryers made to operate at 208 VAC or
230/240 VAC, the electrical input connection is made into
the terminal block located at the upper rear of the dryer (refer
to the illustration below). For electric model dryers made to
operate at 380 VAC, 416 VAC, 440 VAC, or 480 VAC, the
electrical input connection is made to the oven relay located
at the upper rear of the dryer (refer to the illustration below).
Input connection wiring must be sized properly to handle the
dryer’s current draw. This information is printed on the dryer’s
data label.
NOTE: A circuit servicing each dryer must be provided.