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replace belts as a set. Never mix used belts with new Full electrical power can now be applied. Special
belts. Belts should always be stored in a cool, dark, attention should be given to determine if the bearings,
dry area. belts, etc., are working properly. With the unit now in
full operation and all ductwork attached, measure the
amp draw of the motor and compare to the nameplate
ELECTRICAL CONNECTIONS
rating to determine if the motor is operating under safe
CAUTION ELECTRICAL HAZZARD load conditions.

Before connecting the motor to the electrical NOTICE
supply, check the electrical characteristics as
indicated on the motor nameplate and wiring Caution should be taken to run-in the bearings for
configuration. a short period of time so excessive bearing
temperatures are not encountered. This should be
Inspect for any damage resulting from shipment and
repeated until the bearings reach normal operating
turn the shaft by hand to insure free rotation. If the
temperature, which can range from “cool to warm
motor has been in storage or subject to adverse to the touch” up to the point of being “too hot to
moisture conditions, dry it thoroughly before touch for more than a few seconds” depending on
operating. After drying, run the motor disconnected to
the bearing size, speed and surrounding
the load for a short time for further drying and as a
conditions.
check on the motor bearings.
ACCESSORIES
If a controller is furnished, the wiring diagram for the
controller must be followed. Special attention should
Inlet Vanes:
be given to ensure that a single phase motor is
Manually controlled vanes are to be adjusted to obtain
connected only to a single phase power supply of
proper voltage, the same applies to a three phase the required airflow. The operating arm is secured to
motor. Electric motors will overheat and fail quadrant with locking pin.
immediately if improperly connected. It is also
Vanes with actuators, (whether electric or pneumatic)
recommended that in every motor connection, an
should have the linkage between the actuating motor
overload device be installed between the current
supply and the motor to protect the motor from and the operating handle adjusted to prevent
under-voltage conditions and motor overloads. over-travel.
Automatic vanes are not furnished with actuators.
If motorized shutters are supplied, care must be taken
that they are connected to the correct voltage supply
or have been supplied with adequate transformers. Discharge Dampers / Shutters:
Centrifugal fan dampers are furnished for either
automatic or motorized operations. Both types are
After electrical connections are completed, apply just
typically maintenance free.
enough power to start the unit. Refer to FIG. 3 for
wheel types and rotation. If the unit is turning in the
wrong direction, it will not deliver the rated capacity. Automatic, as well as motorized wall shutters can be
This issue can be resolved by altering the motor furnished for use with propeller fans. When installing
connections. these shutters, be sure the opening is free of any
interference and the walls are plumb.

Fig. 3

PBOIPM-V05
REVISED 12/2018