Conversion of Primary Operator Voltage
Conversion of Primary Operator Voltage
Conversion of Primary Operator Voltage
Conversion of Primary Operator Voltage
Conversion of Primary Operator Voltage
These instructions do not apply to conversions from single phase to three phase
or vice versa. Conversion from one phase to another is not recommended.
Steps required to convert the voltage of an operator within the same phase:
1.
The overload must be changed to match the motor current at the new operating voltage.
To do this, remove the overload device from the contactor by loosening the three screws T1, T2 and T3 on the
contactor. Remove all the wires on the overload and replace them exactly the same position on the new
overload. Mount and tighten screws firmly. Be certain the new overload is adjusted to match the motor
nameplate amps that correspond to the new voltage. Note that the existing overload has sufficient range to
accommodate adjustment from 208 volts to 230 volts or vice versa.
2.
The primary tap on the control transformer must be changed to the new voltage.
This is accomplished by first reading the label on the top of the control transformer to determine which color
primary lead corresponds to the new voltage to be used. Disconnect the existing primary lead (
Caution
: Do
not disconnect the primary “Common” lead) and reconnect the primary lead to the same location.
3.
The power leads to the motor must be reconnected in the motor junction box to match the new voltage.
You must remove the cover from the junction box on the electric motor. Reconnect the primary leads in the
new configuration shown on the motor nameplate that matches the new voltage. Note this step does not need
to be performed for conversion between 208 volts and 230 volts.
4.
The operator must be re-labeled to indicate the new voltage.
Apply new labels to the operator so that the correct primary voltage is indicated.
5. To add a heater you need the following parts: (includes thermostat wire and all mounting hardware):
120 VAC AEKHE 120 250
208-240 VAC AEKHE 240 250
480 VAC (includes relay) AEKHE 480 250
4/13/00 E18
