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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.