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Posted by KJPRO on May 14, 2008, 3:22 pm
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> Most of my work has been new construction and very little service tech
> so forgive me if this is too simple. My ex-wife called me a few days
> ago and said her heat pump wasn't cooling.
This is your problem HOW????
She's an EX for a reason!
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> She said someone replaced
> the compressor, which made it much better, but it's still not cooling
> like it should. So I thought that unless I want to give her even more
> of my hard earned money, I better load up the truck and head over.
More of your money??? Are you required to maintain HER equipment or living
conditions???
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> Here's what I found. It's a 3 ton 10 seer HEIL split system heat pump
> with a TXV. New copeland recip compressor and new dual cap. Coils
> are clean, filter is clean. I put the guages on and that's when I got
> a little confused.
> outside air temp - 81
> inside air temp = 78
> Outdoor humidity: ~70%
> Suc Pressure - 64
> Suc temp - 80
> Liq Pressure - 200
> Liq temp - 87
> Condenser TD - 13
> Evaporator TD - 14
> My handy Trane charging chart shows it being slightly overcharged....
> but shouldn't be enough to give me such a low TD across the evap.
> Rather than just start fiddling with the charge I thought I might want
> to actually try to figure out what's wrong with it.
> The only other thing out of the ordinary is the condenser fan was
> replaced with one that's 75 rpm faster. It calls for a 1075 rpm and
> has a 1150. In my brief experience I believe that won't have a big
> effect.
> any ideas?
How long is the lineset and where is its location?
Have you checked for proper indoor fan speed?
The system is NOT overcharged or you would have a higher Subcooling reading.
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