2019年10月19日 · Topped up a 404A system with approx 3lbs of 404A. What I didn't know that the system was changed to 407C at some point. Total gas inside around 110lbs. Don't think …

2019年5月22日 · There are additives that I have used for years on 407c conversions. As long as there is no acid in the system they work great Diversitech makes one. Diversitech 981 you do …

2016年5月22日 · So I am at the parts house chatting with other techs about the price R22 and I come to find out that there are some techs that are no longer buying R22 and just adding …

2013年6月4日 · I have heard that 407c doesn't have that great of oil return so using on a rack with an oil seperator is why it is for supermarkets. 407a has a better oil return (mixing ability). Kinda …

2019年4月17日 · The absolute best thing to do with those units is to use R-22 over mineral oil. The reason is there is no oil pump in them. And they have a robust history of failures after …

2019年7月20日 · When R-407C first became available I was curious about it all but I don't pay a lot of attention to the hard details of it now. It does make me smile to remember those charts …

2015年1月25日 · R-407C is a drop-in for R-22 - the same TXV's are cool with either refrigerant. But R-404 valves will not play very nice with R-407C. The flow rates are too different - the R …

2018年8月9日 · You can use the R-407C in the R-410 system - IF it has a piston metering device. If there is a TXV - that will have to be changed to R-407 as well. When you are choosing the …

2021年4月14日 · Doing compressor replacement or new condenser would you use R-421A or R-407C or reuse recovered R-22? Capacity is not issue, more importantly longevity. compressor …

2021年1月6日 · Poodle , I’m looking for the exact 407c chart (piston) and for the other people if you can’t help, Do not waste your time and my time, I’m looking for help Reply 01-07-2021, …