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Old 06-19-2011, 03:32 PM   #16
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R410A Guage set


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Originally Posted by Marty S. View Post
That's true for now Jeff. I've heard rumor that a special certification for 410 is coming but have not seen anything in writing yet. Might not ever happen.

Ain't gonna happen. R410A is already in phase down, so they aren't going to do anything special to pass any requirements.

R410A does not require a section 608 cert to purchase, handle or service equipment utilizing it.


Just be sure you know how to connect and disconnect the hoses first. nasty frost bite if you screw up.

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Old 06-19-2011, 09:39 PM   #17
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R410A Guage set


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When you check the pressures on a heat pump, do you take them in heating and cooling mode or is one sufficient? Is there a best time of year to do it where the outdoor temps will be high, or low, etc?
It's easiest to check refrigerant in cooling mode with normal inside and outside operating conditions. Still a good idea to check heating mode once it cools down in the fall to make sure outdoor txv is working correctly.
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Old 06-19-2011, 11:07 PM   #18
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R410A Guage set


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Originally Posted by Marty S. View Post
It's easiest to check refrigerant in cooling mode with normal inside and outside operating conditions. Still a good idea to check heating mode once it cools down in the fall to make sure outdoor txv is working correctly.

I went for the 14SEER unit so I don't have an outdoor TXV.. Wish I did because I use the HP a lot more in heating mode than AC mode..

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