American Dryer Corp. MDG75V - Manual (Page 27)

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6. 3-Phase (3ø) Wiring Connections/Hookup (for reversing models only)
The electrical connections on ALL 3-phase (3ø) gas dryers are made into the rear service box located at
the upper left area of the dryer. Electrical connections for electrically heated dryers are made in the
electric oven area located at the upper rear area of the dryer.
IMPORTANT: A separate circuit servicing each dryer must be provided.
If local codes permit, power to a gas dryer can be made
by the use of a flexible U.L. listed power cord or pigtail
(wire size must conform to rating of dryer), or the dryer
can be hard wired directly to the service breaker panel.
In ALL cases, a strain relief must be installed where the
wiring enters the dryer.
The only electrical input connections to the dryer are the
3-phase (3ø) power leads (L1, L2, L3, and sometimes
neutral) and ground. Single-phase (1ø) power for the
control circuit is done internally to the dryer. No
single-phase (1ø) input connection is required on a 3-phase
(3ø) dryer.
For gas dryers manufactured for operation at 3-phase (3ø), the
electrical connections are made at the power distribution block
located in the service box at the rear, upper left corner of the
dryer. The ground connection is made to the copper lug also
provided in this box. To gain access to the service box contactor,
the service box cover must be removed.
CAUTION: The dryer must be grounded. A ground lug has been provided for this purpose.