http://www.yellowjacket.com/product/727
410 will blow the seals out after a couple hundred hook ups,that's why they say not recommended for 410. Not a big deal for you but I have to rebuild often. No EPA certification needed for 410A.
Are you required to have a license or to be certified to handle and purchase R-410A?
You are required to have an EPA Section 608 Type II or Universal certification license to handle R-410A but no license is legally necessary for purchase. A refrigeration supply house may have its own rules regarding who they are willing to sell R-410A to (they will typically require Section 608 Type II even though the EPA doesn’t require it for safety and liability reasons).
That is because it's a high pressure refrigerant going into a high pressure appliance. The atmosphere safe thing is what gets people confused, why they often think they don't need a license and they might not where you live but here no on will sell it to you without one.
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.
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.
been working with 410 for years …zero problems…..same gauges for 6 years
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