GE ECM Variable Speed Motor -- retrofit ??

Old 06-29-04, 11:11 PM
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Question GE ECM Variable Speed Motor -- retrofit ??

I'm contemplating replacing my multi-speed blower motor (use hi/lo) with a new GE ECM 2.3 variable speed electronic commutated motor.

Q. Can I order a GE ECM blower motor as a retrofit? or
Q. Will I have to secure a major make's part number of an ECM for an existing system similar to mine?

My System
  • Installed = 1993
  • Region = Tulsa
  • Outdoor coil = Carrier 38YR heat pump, 3 ton
  • Indoor coil = York horizontal slab coil, 4-ton, w/TXV
  • Furnace = Hydronic, 52K btu, w/blower (water heat w/forced air)
  • Boiler = Two A.O. Smith FSG-40 water heaters (also domestic hot water)
  • Variable Air Volume = Carrier Comfort Zone (3 zones)

I run the system fan continuously and figured I could save a few kwh during FAN only and low demand times by converting the multi-speed blower motor to a GE ECM variable speed motor.

Thanks in advance!
Old 07-02-04, 07:11 PM
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after a lot of thought and questioning other pros, here is what i come up with:

changing the motor will require changing the motor controller.

a new circuit board that runs a unit similiar to yours will be needed.

it can be done, gonna get pretty technical and pricey. a new VS ahu may be cheaper in the long run . new parts, warranty, etc.

11 yrs old, i would replace it.

probably looking at 650 for parts to upgrade, ball park figure

replacement with vs here in atlanta, just over twice that, has new coil, etc
Old 07-04-04, 08:02 AM
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I'm with HVAC. Your re-engineering a unit that's 11 years old. It can be done but like he said you have to do alot of "Frankenstiening" <--word of the day.

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