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Posted by Stormin Mormon on June 2, 2008, 8:51 am
Water coming out the secondary drain is always a concern, to me. Makes me
wonder, if the primary drain is clogged.
Since he had the unit turned off over night, it's possible the evaporator
was frozen over. Not as likely with a TXV coil, though. High super heat may
be from humidity removal.
Good idea to check the temperature of the liquid line leaving the condensor.
I'm finding that most of the systems I am asked to service have dirty
condensors. Many times, some condensor cleaning is all the system really
needed. Please let us know what you find.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
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>
> I need model and serial numbers.
>
>> According to the chart the head pressures were right on
>> the money.
>> SP - 55 psi
>> HP - 225 psi
>> SH - 27 deg.
>> SC - 20 deg.
>> 86 DB outside temp
>
>
> Something is not right.. need model and serial numbers.
>
>> It doesn't even have a subcooling reference at all.
>> Its pouring water out of the drain so its obviously doing some
>> dehumidifying. I'm going back to check in the morning when I'll actually
>> feel like working but curious if any one familiar with Rheem has ever run
>> into this funky TXV 25-30 deg. SH spec. on a residential unit.
>
> What are the model numbers for the heat pump and the air handler? The coil
> model number would be good too.
>
> As a rule, with Rheem stuff, you want 10 - 14 degrees of subcooling.
>
> My first impression is that its overcharged....and there may be an airflow
> restriction to complicate matters, and until I know what the model numbers
> are, I really can't tell you much else.
Outside Model # RPNJ031JAZ
I'll probably get the indoor model numbers tomorrow.
I was in shorts & sandals & not about to go into the attic today.
I just came back from walking my dog again & he said everything was
working great. It's cold as ice in the house & it got to 90 degrees
outside after I left.
I might try another set of gauges tommorrow just to be sure but it has
specific charging instructions on the unit inside cover. They say that the
TXV used for cooling is non adjustible with a fixed 25 to 30 degree SH.
It doesn't have any subcooling specs but it gives specific head pressure
readings under outside ambient conditions. The SH just doesn't make sense.
My Suction line temp was 57 & air coming out was 68 which seems about
right. According to what's written on the unit I'd need to have about
47 psi on the suction line to get a good temp drop across the coil.
Most Rheems that I've worked on have a little higher than normal suction
pressures because they run well over 400 cfm's per ton.
Maybe this was one of Rheems experimental units.
I can't find it listed in ARI at all.
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