Carrier 17/19EX - Manual (Page 128)

also be stated. If either is unknown, the correct sequence can be determined in the following
manner: While the motor is uncoupled from the load, start the motor and observe the direction
of rotation. Allow the motor to achieve full speed before disconnecting it from the power source.
Refer to Open-Drive Motor Pre-Start Checks for information concerning initial start-up. If
resulting rotation is incorrect, it can be reversed by interchanging any 2 incoming cables.
Open-Drive Motor Auxiliary Devices
Auxiliary devices such as resistance temperature detectors, thermocouples, thermoguards,
etc., will generally terminate on terminal blocks located in the auxiliary terminal box on the
motor. Other devices may terminate on their own enclosures elsewhere on the motor. Such
information can be obtained by referring to the certified drawing. Information regarding terminal
designation and the connection of auxiliary devices can be obtained from auxiliary drawings
referenced by the outline drawing.
If the motor is provided with internal space heaters, the incoming voltage supplied to them
must be exactly as shown by either a nameplate on the motor or the outline drawing for proper
heater operation. Caution must be exercised anytime contact is made with the incoming space
heater circuit as space heater voltage is often automatically applied when the motor is shut
down.