EcoRenovator - View Single Post

Xringer · 10-11-09, 03:11 PM

"...and as food for thought, I have heard that HVAC techs may, in the middle of a pump-down, close the appropriate valves, change oil, turn on the pump and re-open the appropriate valves and continue on to finish."

I was doing some reading on the topic too. Read about people doing 3 pump downs.
Go full vac, fill up with dry air or Nitrogen and repeat three times,
ending with a vacuum.

And, just about everyone says to change the oil before each use..

~~~

Also read about using a micron gauge. One guy had three of them and they all gave different readings.
Another fellow said they were a luxury that you really didn't need,
and spend your money on a good manifold and a good pump and keep it good shape.

I guess that pump is the one. Now I need to look for a good R410A manifold.
Are the fittings going to be compatible?? Or will I need an Adapter?
R410a Adapter KIT Sanyo, Panasonic, Mitsubishi, Fujitsu - eBay (item 400033059094 end time Oct-20-09 17:27:17 PDT)
1/4" Male flare with Schrader valve x 5/16" also known as 1/2"-20 UNF Female.

Thanks!

10-11-09, 03:11 PM	#32
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	"...and as food for thought, I have heard that HVAC techs may, in the middle of a pump-down, close the appropriate valves, change oil, turn on the pump and re-open the appropriate valves and continue on to finish." I was doing some reading on the topic too. Read about people doing 3 pump downs. Go full vac, fill up with dry air or Nitrogen and repeat three times, ending with a vacuum. And, just about everyone says to change the oil before each use.. ~~~ Also read about using a micron gauge. One guy had three of them and they all gave different readings. Another fellow said they were a luxury that you really didn't need, and spend your money on a good manifold and a good pump and keep it good shape. I guess that pump is the one. Now I need to look for a good R410A manifold. Are the fittings going to be compatible?? Or will I need an Adapter? R410a Adapter KIT Sanyo, Panasonic, Mitsubishi, Fujitsu - eBay (item 400033059094 end time Oct-20-09 17:27:17 PDT) 1/4" Male flare with Schrader valve x 5/16" also known as 1/2"-20 UNF Female. Thanks!