Labconco Coated Steel, Fiberglass and PVC Blowers 7183200 - Manual (Page 17)

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Chapter 3: Getting Started
wire directly to the exposed terminals inside the motor. A
knockout has also been provided on the side of the motor for this
purpose.
Access the motor by removing the top weathercover of the blower
base. This weathercover is held in position by machine screws,
and once they have been removed, you will have access to both the
motor and V-belt area of your blower.
CAUTION: Inspect the motor manufacturer’s
nameplate carefully prior to connecting your
electrical service for both the correct lead wire
orientation and motor rotation.
The blower base end panel is raised off the blower base to allow
for a continuous flow of cooling air through the motor cavity.
Slots and louvers have also been placed on both the front and back
of the blower base to provide airflow through this motor cavity.
Because the blower base end panel is shorter than the rest of the
base assembly, you will be able to run your electrical conduit
directly underneath this panel. No special cutouts or modifications
are necessary.
Three Phase Power
Most all Labconco Fume Hoods have a simple single-wire switch
for controlling single-phase power to a motor/blower. When a 3-
phase motor is required, all 3 phases must be switched ON or OFF.
To do this, the Labconco single wire switch can be used to control
a power relay (also called a contactor or motor starter), which uses
the switched Labconco power to control the switching ON (or
OFF) of all three phases at once. The drawing on the following
page shows such a setup.
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