The supply power

The supply power, voltage, frequency and phase must
coincide with that on the nameplate. All wiring should be
carefully checked against the manufacturer's diagrams or
with the diagram on the unit's access panel. Field wiring
must be connected in accordance with the National Code or
other local codes that may apply. Make certain that the
equipment is adequately grounded per local code
requirements. Use copper wire only between disconnect
and unit.
Over current protection less than that recommended on the
unit's "Specification Sheet" could result in unnecessary fuse
failure and service call. The manufacturer bears no
responsibility for damage caused to the equipment as a result
of not using the recommended size for the protective devices
as listed on the unit's rating plate