410 charging

Lil-Roc

The best way would be to weigh in the charge. You add it in as a liquid through the suction side of your manifold. Flash it in by cracking open the suction side manifold. Also its better to use a TXV and charge by subcooling. Goodman and Armsrtong now have R410a units with pistions, but in my opinion a TXV would be the only way to go on R410a.

Todd_17

410 charging

what is the best procedure for adding additional 410 to a long line set split system a/c only

Todd_17

410 charging

what is the best procedure for adding additional 410 to a long line set split system a/c only

burnerman_2

new at this too

410 is not new but we are installling more of the split systems the one i was on only had a place for low side after hookin up manifold gauges you must turn 410 jug upside down be sure you use gauges that are made for 410 higer pressure then see what the chart requries royboy

Dale

charge add

I agree that with 410 an electronic scale is necessary. The mfg. paperwork will tell you the new unit is precharged for example assuming a 25" line set then list how much extra per foot of lineset. I use a cheap orifice on the tank to change liquid to gas, you do always have to draw 410 as liquid. If the line set is say 5 to 10 feet too long and you have a txv I would ignore the extra length unless you live in Ariz. or someplace where 95 degree design conditions are common. Good luck.

Greg_41

R410a charging

If you have accurate info for line set size (if the run goes over 60', you should increase the suction line one size up), but I've allways had good results charging to superheat with fixed oriface or subcool with txv. I use only American Standard (Trane) for A/C and all their evap. coils come with a low side service valve and txv, so everything can be done inside. 410a is the same as anything else, take temp splits at both coils and read the guages.....it's all good.....Greg

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michael siena

charging 410

remember that 410 is not a ref. that likes to be together so when you loose some of the charge you have fractioned off a component that makes up 410. Now you have garbage in the system. When you add a little be sure to weigh in the small amount that you add and figure out what the % of the charge. If more then 5-10% recover the whole charge and recharge with NEW 410. you must pressure test and vac down like normal to find and repair the leek. Put in new valve stems I have pulled out my hair only to find something simple caused the problem.

Lil-Roc

R410a is a Zeotropic. Zeotropic mixtures are similar to near-azeotropic mixtures with the exception of having a large enough temperature glide to be concerned with fraction. Yes they do sepatate but will not suffer significant segregation in the system and will not materially change its composition due to a leak. So if you have a leak you do not have to take out what R410a is left in the system. The main concern when you have a leak is when you loose your whole charge and the system has been open. Moisture will get in and then you will have to always add a drier the get the moisture out, and sometimes you may need to come back and change out the drier a few times to get it running right.

Todd_17

Thanks to all who responded to my question.