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INSTALLATION INSTRUCTIONS (CONTINUED)
Grounding
Make sure all the components are properly grounded
to prevent death or serious injury.
This product must be grounded. Grounding reduces the
risk of electrical shock by providing an escape wire for the
electric current if short circuit occurs. This product must be
installed and operated with a power cord or cable that has
a grounding wire.
Breakers and Fuses
The entire electrical system should be checked by a
certified electrician. Time delay breakers and fuses are
required for this compressor. A tripped breaker or blown
fuses may indicate a direct short to ground, high current
draw, improper wiring, incorrect fuse or breaker size
and/or type. This needs to be evaluated by a certified
electrician.
Motor Hookup and Starter Installation
Branch circuit protection must be provided as specified
in the United States National Electrical Code, Chapter
2, "Wiring Design and Protection." Article 210, using the
applicable article "For Motors and Motor Controllers,"
(Article 430, Table 430-1 52).
IMPORTANT: Overload protection is required for all
motors.
Motors on Speedaire two stage units do not have built-in
overload protection. A magnetic starter is required. Refer to
the following wiring diagrams for electrical installation:
Shop Air Series Models - Figure 6
Three phase motors are tri-voltage rated: 208-230/460.
They are shipped from the factory pre-wired for 208-
230 volt operation. If 460 volt operation is desired, some
rewiring is required.
Shop Air Series Models
1. Rewire the motor leads for 460 volt per motor data
plate.
2. Install the 460 volt conversion kit (part number
ST122008AJ). Both the coil and the thermal overload
elements in the magnetic starter must be changed (see
Figure 5).
Improperly grounded electrical
components are shock hazards.
Figure 5 - 460 Volt Conversion Kit - Shop Air
Series
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