[jpsmith1cm]

robinslloyd,

If you do not understand something completely, then it is often ill advised to attack it full on.

Are you employed in this trade or just DIYing?

 

[jpsmith1cm]

Without a comprehensive knowledge of all of the variables that come into play, your cheap unit will cost you a LOT more in the long run.

 

[jpsmith1cm]

Is this not true with all units {even expensive one] that are not properly set up?

Absolutely.

 

[jpsmith1cm]

I do not know why my price was removed as I found it very attractive.

Pricing is not permitted under the site rules that you agreed to when you joined here.

 

[jpsmith1cm]

Have you all seen this guy charging his heat pump with propane?

That's just what you need.

An improperly installed system with an explosive refrigerant in it...

 

[jpsmith1cm]

Properly applied, propane is a very good refrigerant.



I don't think that this is the proper application.

 

[jpsmith1cm]

slewsader

This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

You can find the rules for posting and qualifications here.

Further infractions may result in loss of posting privileges.

 

[jpsmith1cm]

Did you pressure test the joints? What were the conditions of the test?

How deep of a vacuum did you pull? How long did it hold?

Did you install a filter drier?

Did you test the airflow?

Take any other readings?

What more could I wish for?

A properly matched system.

 

[jpsmith1cm]

I didn't see your price and, really, it doesn't matter.

What you saved on installation will cost you in energy and, possibly comfort in the long run.

 

[jpsmith1cm]

Actually, I don't work in the residential sector of this industry, so I stand as an objective observer in this case.

While I agree that it is possible for you to get everything right without comprehensive testing, the likelihood of it is quite slim.

Newer systems are not nearly as forgiving as those that were built 30 years ago in many respects.

I wish you luck with your system, and I sincerely hope that it works well for you.

 

[jpsmith1cm]

mofotech,

This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

You can find the rules for posting and qualifications here.

This is your second warning. You will receive 5 infraction points. Additional infractions will result in more infraction points and loss of posting privileges.

 

[jpsmith1cm]

Is this something you all do in Texas? If he is the pro is there anything of importance that I would need to ask him, that he would not already know to check in order for my system to be running correctly without me asking.utergreet:

One would hope that a "professional" in this trade would know what is required to verify that a piece of equipment is running properly, but sadly, there are a LOT of guys running around, doing half-azzed work and getting paid for it.

 

[jpsmith1cm]

6 degrees superheat is extremely low.

 

[jpsmith1cm]

Unless you have an extremely long lineset, it is not necessary.

 

[jpsmith1cm]

Why would the air handler instructions say if the supper heat is less than 4* or greater than 8* an adjustment is required?

I'd be concerned even at 8 degrees superheat.

Most compressor manufacturers want 20 at the compressor as a minimum for safety.

 

[jpsmith1cm]

The air handler instructions say 10-12 of sub cooling.

That is a good number.

6 degrees superheat is not.

 

[jpsmith1cm]

The air handler instruction must be wrong on super heat:gah:

I re-scanned this thread.

Did you ever post a model number of the air handler?

I'd like to see that in print.

 

[jpsmith1cm]

Nothing in the spec sheet on the air handler gives an indication of a superheat reading.

 

[jpsmith1cm]

Do you think that this is true?

Some Heat Pumps with TXV's are set at 7 to 9-F Super Heat because they have Suction Line Accumulators to store any spill-over liquid, which protects the compressor. I'm OK with this.

Superheat should be checked as close to the inlet of the evaporator refrigerant metering device as possible. Absolutely wrong.

For TXV Subcooling, take the pressure of the liquid line note the gauge saturation temperature.
Compare it to the actual temperature obtained near the same point the pressure was obtained.
Thermostatic Expansion Valves (TEV / TXV) should be set for a minimum 10-Degrees Superheat on A/C systems
Heat pumps with accumulators down to 7-F Super Heat.


This link may help I found it on a yahoo search. utergreet:

This is the air handler installation instructions.
Click on the link that says [PDF]
Electric Air Handler


http://search.yahoo.com/search;_ylt...UjU-?p=fedders air handler manual&fr2=sg-gac&fr=my-myy&pqstr=fedders air handle

.