Models: AX12, AX14, AX16, AX18, AX22, AX24, AX26, AX28
Page 3 February 2011
Frequently Asked Questions
How do I change a fan motor from 230V to 460V?
oWiring from 230 to 460 or 460 to 230: The actual wiring diagram from the motor
manufacture will be needed. You will need the catalog number off the motor
(example UCLE1015). On Baldor’s web site under support you can inquire under
the catalog number and have access to wiring diagrams, performance spec’s,
etc.
How do I change a 115V single phase fan motor to a 230V single phase?
oSome 1ph fans such as the AX12 and AX14 use single phase motors that can be
wired up for either 115v or 230v. On the back of the motor there is a plate that is
removable. On that plate will be a diagram showing low and high voltage hook
up.
oBaldor’s web site can also be used for wiring connections.
How much variation can there be in line voltage for motors?
oElectric motors can operate normally at voltages that are +/- 10% of their rated
voltage. Example –a 460V motor has an operating range of 414V-506V
oHigher voltage will result in slightly lower amps.
How can I change the fan controls from 230V to 460V?
oThe control circuit operates at 115 volts so it will need a transformer or a
separate 115V line for the control circuit.
oProcess varies depending on the fan model, but typically you will need to
add/change the following components:
Contactor (not always required)
Overload switch
Auxiliary contactor
Transformer
oSee Appendix A for part numbers
How can I change the fan controls from 460V to 230V?
oProcess varies depending on the fan model, but typically you will need to change
the following components:
Contactor
Overload switch
Transformer
Wiring diagram and voltage decals
Increase wire size for new amperage load
Larger wire connectors for larger size wire
oRemember, going from 460V to 230V will double the amperage so the wire size
may need to be increased. Please consult a licensed electrician.
What can be done to change the 115V coil to a 230V coil?
oThis can be done but Brock does not carry the 230V coil. A licensed electrician
can source a replacement coil.
oNote: This problem sometimes will come up when a neutral wire is missing. A
neutral wire is required for a 115V control circuit. (you need both a neutral and
ground wire)
