Finding TXV problems? - Page 3

>> wrote:
>>>>>Bubba wrote:
>>>>>> Has anyone been seeing new TXV problems?
>>>>>> Ive recently installed a Tempstar 5 ton 14 SEER condenser with an
>>>>>> Aspen TXV coil. (Sorry, the Tempstar matching coil had NO WAY fo
>>>>>> fitting in that space.) Ran fine about a month. Customer called
>>>>>> saying it wasnt cooling and was making a ton of noise outside. I get
>>>>>> there turned it on and watched it run perfectly and flawlessly for
>>>>>> about 1/2 hr. Subcooling was perfect. Went to the truck to do some
>>>>>> paperwork and customer came out and told me the noise started again.
>>>>>> Sure enough the Internal relief valve opened up in the compressor.
>>>>>> Shut the unit off and back on and it ran for almost 2 weeks fine
>>>>>> again. Same problem yesterday. Gotta change out the TXV this week
>>>>>> which is evidentially closing intermittently.
>>>>>> Had a Trane dealer close to me tell me the same exact scenario about a
>>>>>> week ago of a new Trane system he installed.
>>>>>> Anyone else found this lately?
>>>>>> Bubba
>>>>>Check the mesh screen in the liquid line connection at the valve. Also,
>>>>>install a new liquid filter drier in the liquid line before the valve.
>>>>>If
>>>>>the valves thermal diaphram is failing, it may be a "bad" liquid charge
>>>>>on
>>>>>the thermal bulb. A failing thermal bulb will close the valve.
>>>> Thanks for the info Zyp but these are the factory installed cheap
>>>> expansion valves. You know, the ones those Tiwanese or Koreans or
>>>> whoever is shipping this cheap junk. No serviceable screens, parts or
>>>> adjustments. The bulb charge is not bad as that would shut the valve
>>>> and keep it shut. This is a very intermittent problem. It has occured
>>>> twice in about a 2 to 3 week period.
>>>> Im thinking there may be a lot of this showing up shortly.
>>>> As always, I always install a new drier at the indoor coil.
>>>> Hoping I find others that are running into this problem.
>>>> I just dont want to change the valve with another valve that has the
>>>> same problem.
>>>> Bubba
>>>Is it possible that the bulb is not attached correctly or if its R-22, I
>>>would also be wondering if there is some moisture in the system, or non
>>>condensibles that make it *seem* like the valve is closing.
>> Sorry about that. This is Strictly R-410a systems. NO R-22. Bulb is in
>> the 10 oclock position on a horizontal run and insulated. No moisture
>> unless the new drier and 400 microns I pulled on it and held with my
>> JB Vac pump and digital guage lied to me. :-)
>> Bubba
>Sorry, my bad.... had to ask tho... sounds like wither a bad valve or
>blocked screen. Is it a heat pump?? or straight a/c?? If its a heat pump,
>when it does its thing, switch to heat mode to see if it clears when you go
>back to cooling. That might help tell you if there is trash in the line or
>its a bad valve. Just cause you did all the right things right when you
>installed it, that doesn't mean that all the right things were done right at
>the factory. A piece of trash in the line will ruin your day.

> wrote:
>>> wrote:
>>>>>>Bubba wrote:
>>>>>>> Has anyone been seeing new TXV problems?
>>>>>>> Ive recently installed a Tempstar 5 ton 14 SEER condenser with an
>>>>>>> Aspen TXV coil. (Sorry, the Tempstar matching coil had NO WAY fo
>>>>>>> fitting in that space.) Ran fine about a month. Customer called
>>>>>>> saying it wasnt cooling and was making a ton of noise outside. I get
>>>>>>> there turned it on and watched it run perfectly and flawlessly for
>>>>>>> about 1/2 hr. Subcooling was perfect. Went to the truck to do some
>>>>>>> paperwork and customer came out and told me the noise started again.
>>>>>>> Sure enough the Internal relief valve opened up in the compressor.
>>>>>>> Shut the unit off and back on and it ran for almost 2 weeks fine
>>>>>>> again. Same problem yesterday. Gotta change out the TXV this week
>>>>>>> which is evidentially closing intermittently.
>>>>>>> Had a Trane dealer close to me tell me the same exact scenario about
>>>>>>> a
>>>>>>> week ago of a new Trane system he installed.
>>>>>>> Anyone else found this lately?
>>>>>>> Bubba
>>>>>>Check the mesh screen in the liquid line connection at the valve.
>>>>>>Also,
>>>>>>install a new liquid filter drier in the liquid line before the valve.
>>>>>>If
>>>>>>the valves thermal diaphram is failing, it may be a "bad" liquid
>>>>>>charge
>>>>>>on
>>>>>>the thermal bulb. A failing thermal bulb will close the valve.
>>>>> Thanks for the info Zyp but these are the factory installed cheap
>>>>> expansion valves. You know, the ones those Tiwanese or Koreans or
>>>>> whoever is shipping this cheap junk. No serviceable screens, parts or
>>>>> adjustments. The bulb charge is not bad as that would shut the valve
>>>>> and keep it shut. This is a very intermittent problem. It has occured
>>>>> twice in about a 2 to 3 week period.
>>>>> Im thinking there may be a lot of this showing up shortly.
>>>>> As always, I always install a new drier at the indoor coil.
>>>>> Hoping I find others that are running into this problem.
>>>>> I just dont want to change the valve with another valve that has the
>>>>> same problem.
>>>>> Bubba
>>>>Is it possible that the bulb is not attached correctly or if its R-22, I
>>>>would also be wondering if there is some moisture in the system, or non
>>>>condensibles that make it *seem* like the valve is closing.
>>> Sorry about that. This is Strictly R-410a systems. NO R-22. Bulb is in
>>> the 10 oclock position on a horizontal run and insulated. No moisture
>>> unless the new drier and 400 microns I pulled on it and held with my
>>> JB Vac pump and digital guage lied to me. :-)
>>> Bubba
>>Sorry, my bad.... had to ask tho... sounds like wither a bad valve or
>>blocked screen. Is it a heat pump?? or straight a/c?? If its a heat pump,
>>when it does its thing, switch to heat mode to see if it clears when you
>>go
>>back to cooling. That might help tell you if there is trash in the line or
>>its a bad valve. Just cause you did all the right things right when you
>>installed it, that doesn't mean that all the right things were done right
>>at
>>the factory. A piece of trash in the line will ruin your day.
> It is a straight Air unit only.
> Bubba

> I know that none of you will agree with me
> however you have choice replace compressor or
> dump 410 and charge unit with 22 good lock
> tony
>> wrote:
>>>> wrote:
>>>>>> wrote:
>>>>>>> Bubba wrote:
>>>>>>>> Has anyone been seeing new TXV problems?
>>>>>>>> Ive recently installed a Tempstar 5 ton 14 SEER condenser with
>>>>>>>> an Aspen TXV coil. (Sorry, the Tempstar matching coil had NO
>>>>>>>> WAY fo fitting in that space.) Ran fine about a month.
>>>>>>>> Customer called saying it wasnt cooling and was making a ton
>>>>>>>> of noise outside. I get there turned it on and watched it run
>>>>>>>> perfectly and flawlessly for about 1/2 hr. Subcooling was
>>>>>>>> perfect. Went to the truck to do some paperwork and customer
>>>>>>>> came out and told me the noise started again. Sure enough the
>>>>>>>> Internal relief valve opened up in the compressor. Shut the
>>>>>>>> unit off and back on and it ran for almost 2 weeks fine again.
>>>>>>>> Same problem yesterday. Gotta change out the TXV this week
>>>>>>>> which is evidentially closing intermittently. Had a Trane dealer
>>>>>>>> close to me tell me the same exact scenario
>>>>>>>> about a
>>>>>>>> week ago of a new Trane system he installed.
>>>>>>>> Anyone else found this lately?
>>>>>>>> Bubba
>>>>>>> Check the mesh screen in the liquid line connection at the
>>>>>>> valve. Also,
>>>>>>> install a new liquid filter drier in the liquid line before the
>>>>>>> valve. If
>>>>>>> the valves thermal diaphram is failing, it may be a "bad" liquid
>>>>>>> charge
>>>>>>> on
>>>>>>> the thermal bulb. A failing thermal bulb will close the valve.
>>>>>> Thanks for the info Zyp but these are the factory installed cheap
>>>>>> expansion valves. You know, the ones those Tiwanese or Koreans or
>>>>>> whoever is shipping this cheap junk. No serviceable screens,
>>>>>> parts or adjustments. The bulb charge is not bad as that would
>>>>>> shut the valve and keep it shut. This is a very intermittent
>>>>>> problem. It has occured twice in about a 2 to 3 week period.
>>>>>> Im thinking there may be a lot of this showing up shortly.
>>>>>> As always, I always install a new drier at the indoor coil.
>>>>>> Hoping I find others that are running into this problem.
>>>>>> I just dont want to change the valve with another valve that has
>>>>>> the same problem.
>>>>>> Bubba
>>>>> Is it possible that the bulb is not attached correctly or if its
>>>>> R-22, I would also be wondering if there is some moisture in the
>>>>> system, or non condensibles that make it *seem* like the valve is
>>>>> closing.
>>>> Sorry about that. This is Strictly R-410a systems. NO R-22. Bulb
>>>> is in the 10 oclock position on a horizontal run and insulated. No
>>>> moisture unless the new drier and 400 microns I pulled on it and
>>>> held with my JB Vac pump and digital guage lied to me. :-)
>>>> Bubba
>>> Sorry, my bad.... had to ask tho... sounds like wither a bad valve
>>> or blocked screen. Is it a heat pump?? or straight a/c?? If its a
>>> heat pump, when it does its thing, switch to heat mode to see if it
>>> clears when you go
>>> back to cooling. That might help tell you if there is trash in the
>>> line or its a bad valve. Just cause you did all the right things
>>> right when you installed it, that doesn't mean that all the right
>>> things were done right at
>>> the factory. A piece of trash in the line will ruin your day.
>> It is a straight Air unit only.
>> Bubba

> I just had one this week go out on an American Standard 410A system a
> year & a half old. I don't know what brand TXV but it was smaller
> than usual & it wasn't an Alco or Sporlan. They didn't put a dryer in
> the installation.
> I asked one of the Trane guys about it & he told me they don't put
> dryers in because they come pre-installed in the condenser.