ReplyDon’t think it works that way, because that doesn’t change the evap or condenser size
Professional Member*
Should we be up sizing replacement TXVs for R22 systems that will be converted to R407C? I have a 10 ton Trane Split system that needs a new TXV, and was wondering if I should go bigger to get around the capacity loss?
Professional Member
Don’t think it works that way, because that doesn’t change the evap or condenser size
Honeywell you can buy better but you cant paymore
I told my wife when i die to sell my fishing stuff for what its worth not what i told her i paid for it
Professional Member*
I thought R407C needed more flow then 22?
According to a United book, multiply by 1.07.
10x1.07=10.7 ton valve for R407C
Professional Member*
That is the nominal tonnage rating. More calculations needed to figure out actual required tonnage.Sent from my SM-G965W using TapatalkOriginally Posted by EugeneTheJeep
Professional Member*
Actually Sporlan TXVs are 10% oversize, so I guess not a problem.
Professional Member*
I’ve never heard that 407 requires more flow.
Are you talking about cubic feet per minute of refrigerant flow through the compressor / system?
Of course the specific gravity is different than 22, so you would install less Than the original factory charge on a retrofit.
Professional Member*
You should be fine with the same valve. The capacity difference is negligible.
Sent from my Moto Z (2) using Tapatalk
Regular Guest
you have to see how much capacity unit will loos by changing the to R407 the use a txv for that size, TVX usually can work on 70% of rate capacity with no problem, but try be as closer as posiblem in my experiance with Trane TXV, they normally have bigger capacity than a universal TXV from Danfost, You can used a 12 ton TXV that can go down up to 8.5 tons.
Posting Permissions