On 7/10/2013 1:14 PM, Bob S wrote:

I have a greenhouse with three fans from "American CoolAir".

The problem is that the motors keep failing. ...

The company keeps sending replacements, but I would rather have motors
that didn't need replacing. Is it possible to get drop-in replacement
motors that would actually work more-or-less forever?

The environment is not the greatest, with humid air blowing over them
in summer and the motors in cold air and being frozen in winter, but I
have had other appliances in similar conditions that never suffered a
motor failure.


The motor name labels say

Emerson
Model S63ZZJKW-7333
HP 1/2 RPM 1725/1140 SF 1.3
V 115 Hz 60 PH 1 Code L
A 7.2 SFA 9.5 AMB 40C
Made in Mexico
....

I'm agreeing w/ Karl; Emerson isn't just some generic import Chinese
no-name; generally while they're assembled in Mexico they're good stuff.

A couple of other thoughts -- it's "humid" environment--any chance it's
actually condensing environment and you're drowning them in internal
condensate? Or are they getting wet from watering system or outside?

On mounting, they're not designed for anything except horizontal so if
even slightly off that'll be very bad on bearings.

Are they open-flow or is there air blockage via a damper system or
discharge/intake louvers or the like? That could drastically raise the
flow restriction and raise motor loading if designed/sized solely for
open unrestricted flow...

What does the vendor say? Surely they can't be happy replacing them
this frequently if is under warranty?

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