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Posted by Noon-Air on May 28, 2008, 8:40 am
wrote:
> Sorry I did not fallow all that transpired however in regard
> to thermal expansion valve position of thermal sensor bulb
> it is a standard for sensor to be position on lines 5/8 OD
> at 12 clock as line increase in size the bulb will be position
> to the side as example 21/8" line will have bulb position around
> 4-5 clock position, however in air condition work it could be
> some place around 3 clock or even higher it depend on velocity
> of refrigerant moving through the line. Note if air is moving over
> the bulb you should always consider put some insulation over it.
> Tony
> > 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. 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.
> > 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?- Hide quoted text -
> - Show quoted text -
Ok. I didn't get back when i thought I would but I made time over the
long weekend. non-cons was the problem. I evacuated it, put in clean
new R22 and it worked like a champ. The TXV was clean. Thanks for
all your help.
Your welcome
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> long weekend. non-cons was the problem. I evacuated it, put in clean
> new R22 and it worked like a champ. The TXV was clean. Thanks for
> all your help.