Question about Heating & Cooling
I am assuming you are talking about the fan motor. The motor should be ok, a torque "spasm" can be expected when it starts unless it has a drive to bring the motor up slowly. You didn't say that there is one, so I assume again that there isn't. Though it is variable speed; even if you start it on low the fan will have its largest load, you can check the alignment of the belt if there is one to the fan. If its a direct drive you can check the alignment of the shaft to the blade. I personally would pick up some brackets, or uni-strut and reinforce the mounting plate to put less strain on the motors standard brackets. I believe that would put my mind at ease. Hope this helps. Let me know if you need further assistance.Thanks.
Posted on Mar 16, 2011
Hi, these motors do twist some, but not enough to break the bearing hold down clamps. Some torque is normal. The old ones were just weak and probably rusted. Check your belt for the proper tightness. If it is to tight, it will cause this. Take your index finger and with power off, push down in about the middle of belt. There should be about 3/4 of an inch play in it. You are probably a little paranoid from the first motor, but this is normal for these high torque motors.
A/C, & Heating Contractor
Posted on Mar 16, 2011
750 watt motor is very powerful. Going from the "off" position ot the "hi speed" position on the fan control may be what is causing the sudden torque. Start at the lowest fan speed, and give the fan time to normalize at each speed before going to the next higher setting. If the excess torque still happens, more sturdy brackets may be necessary. If the fan "on and off" is controlled by a thermostat, setting the fan speed to the maximum speed could cause "torque twist" each time it starts up. Try running it at a lower setting and see if the torque is more manageable.
Posted on Mar 15, 2011
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Posted on Jan 02, 2017
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