Just had a new 5 ton Trane XL15l with air handler 4TEE3F65 installed that was vibrating when the centrifugal blower was on. Based on the feedback on my previous post, I insisting this was not normal, and the contractor replaced the centrifugal fan. I watched it taken out and replaced.
When the blower unit was taken out and spun by hand, you could hear and feel the vibrations at certain speeds. The new fan when installed on the motor shaft did not show the same vibrations when spun by hand. However, once in the unit, and turned on, the air handler again was again some vibrations when the blower is on. The level of vibration is less but still much greater than the vibrations of the compressor outside.
What level of vibrations are normal ???
Will such vibrations cause other problems to the air handler?
Are such vibrations something expected in Trane systems ?