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Replacing ECM in a Rheem Rooftop Package

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vhdblood

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Discussion starter · #1 · (Edited by Moderator)
Hey guys,

I have a Rheem Rooftop Package Unit (Model:RRNA-B060JK10E) that has a bad ECM Motor (GE 2.3). I was quoted $ and change for a new one from the local Rheem Distributor.

This unit does not need an ECM, I'd be fine with a single stage fan in this unit. So I'm wondering if there's an easy way to change out the old ECM with a "dumb" fan and how that would work? I've seen products like the Qwik Swap and such for doing these type of replacements, but I'd like to know your thoughts on this. If there's not a good solution I'll just go grab the proper replacement on Monday morning and toss that back in it.

(I'm an in-house tech so it's in my best interest to save the owners as much as possible within reason, which is why i'd prefer to find a cheaper option.)
 
#2 ·
If they don't care about the seer, them a dumb motor or an x13 could be put in it. The more it runs, the better it is to use a more efficient motor.
 
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#3 ·
That price is cost? and yes you could put a standard motor in it, providing you got the correct one and wire it correctly.
 
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#5 ·
There's many benefits for the ecm motor. efficiency, humidity control, ect but as stated if none of that matters then use the cheap motor or even an x13 motor and set the subcool or superheat accordingly

Sent from my SM-N920T using Tapatalk
 
#6 ·
rollandsaxton said:
There's many benefits for the ecm motor. efficiency, humidity control, ect but as stated if none of that matters then use the cheap motor or even an x13 motor and set the subcool or superheat accordingly

Sent from my SM-N920T using Tapatalk
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They can save close to $50 per year, that savings will almost cover half the repair cost if it only dies once in ten years.

Around here they die more often than that.
 
#7 ·
ChaseAir said:
They can save close to $50 per year, that savings will almost cover half the repair cost if it only dies once in ten years.

Around here they die more often than that.
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If there dying that often then I would check for high static pressure that's the biggest killer for ecm the other was moisture in the module which I know the new one are coated better to help with that.

Sent from my SM-N920T using Tapatalk
 
#8 ·
rollandsaxton said:
If there dying that often then I would check for high static pressure that's the biggest killer for ecm the other was moisture in the module which I know the new one are coated better to help with that.

Sent from my SM-N920T using Tapatalk
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That's bull from the manufacturer....the part is made very poorly, especially the X13.

Older variable speed motors were more reliable.

We live in the lightning strike capital of the world, with nine months 2100 hours of cooling and high humidity.....parts that are made with poor quality show themselves in our environment.
 
#9 ·
ChaseAir said:
That's bull from the manufacturer....the part is made very poorly, especially the X13.

Older variable speed motors were more reliable.

We live in the lightning strike capital of the world, with nine months 2100 hours of cooling and high humidity.....parts that are made with poor quality show themselves in our environment.
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In az that is what we see but yes your correct the other is power surges and lightning have you tried surge suppressors and I've seen the high static kill them they will over spin and shut off. As for your area have no clue I lube in a desert

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#10 ·
I have been reviewing materials from Refrigeration Services Engineers Society on Basic Electronics for Controls. The introduction to the section on AC power and Grounding Practices states:

"Approximately 50% of the problems encountered with electronic control systems have their origin in poor ac power and grounding practices"

Is it possible that these ECM motors have been failing due to the systems not having a proper single-point ground (SPG)/Isolated Ground (IG)?
 
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David Goodman
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