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Rotation
is determined automatically the first time the motor is operated. It
is important to operate the motor for the first time in the HVAC system. Do
not bench test the motor. The first time the motor is operated the following
sequence should be recognized:
• The motor will run very slowly in CW rotation (lead end) for approximately 15
seconds then stop.
• The motor will run very slowly in CCW rotation (lead end) for approximately
15 seconds.
• The motor will then either:
◦
increase speed (related to the speed selection energized) at the current
CCW rotation if that is the direction it has selected;
◦
or stop, reverse to CW rotation and increase speed to CW rotation.
◦
Once the motor speeds up, the direction the motor is operating is the
direction it has selected. It will now start and run in this direction the rest
of its life. It will never perform this function again. If this is not the correct
direction it can be reversed.
Changing the rotation of the motor after it has selected a rotation using the
process above is accomplished with the following steps.
• Turn off the power to the HVAC system.
• Leave the HIGH VOLTAGE POWER wires connected
• Connect both the Black and Red (HV1 & HV2) HIGH VOLTAGE SIGNAL
WIRES to the same L1 source as the Black HIGH VOLTAGE POWER wire.
• Leave the Blue LOW VOLTAGE SIGNAL wire connected to 24vac common.
• Disconnect all the LOW VOLTAGE SIGNAL speed wires from the motor to the
HVAC system controls.
• Connect the White (Low Speed) LOW VOLTAGE SIGNAL wire only to the
thermostat (R) terminal or directly to 24vac side of the transformer.
• Restore power to the HVAC system. There is no need for a thermostat
demand. Set a stop watch for 1 minute.
• After 1 minute, turn off the power to the HVAC system and restore all wires to
the desired configuration for the application.
• The next time the motor is energized it will operate in the opposite direction.
