A typical line set size for a 2 Ton air conditioner is ¾” and we can see that in R22 Freon systems we will need to add 0.62 ounces of Freon for each foot of line set over 15 feet. A fifty foot line set will cause you 2 Ton air conditioner to use an additional 1 pound 5.7 ounces.
Most air conditioners range between 1 and 5 tons. Since an air conditioner uses an average of 2 to 4 pounds of refrigerant per ton, a 3-ton AC will need an average of 9 pounds.
Freon MO99 is the gold standard for R-22 alternatives and was developed by the same scientists who engineered Freon R-22. The benefits of Freon MO99 include: Capacity — The ability of Freon MO99 to heat or cool a given space is closer to Freon R-22 than any other refrigerant on the market.
You will add 0.6 oz. per foot additional for the lineset, plus 6oz. for the filter drier, and the long radius elbows add 2.6 additional feet. 22.6 ft x 0.6 = 13.5oz + 6oz.
You can safety assume that this 2 Ton air conditioner system contains approximately 6 pounds of Freon total in a normal 25 foot line set installation with a matching coil. Add 2 pounds to the outdoor unit specification will cover most units.
How much will an R-22 to R-410A conversion cost? The actual cost will depend on many things, including where you live, but most of the time R-22 conversions start at around $2,000 and go up from there. The higher end of that range is somewhere around $4,500 to $4,600.
No complicated math required, you simply add together the gas in the pipe, the compressor/condenser section, and the evaporator = total charge.
For every 1 degree F increase in temperature above 68 F (20 C), add 2 oz (60 g) of R22 refrigerant per ton of cooling capacity.
The liquid header can be oversized with little negative performance effect, however, under-sizing will restrict refrigerant flow and will increase velocity maybe to the point of “water hammer”.
An R-22 Refrigerant Replacement for Direct Expansion Refrigeration. Freon™ MO29 (R-422D) refrigerant is a low-toxicity, non-ozone depleting hydrofluorocarbon (HFC) replacement for R-22.
What refrigerant will replace R-410A in 2025? For whole-home systems, Lennox has chosen 2025 Compliant Refrigerant R-454B due to its excellent performance for ducted systems and zero ozone depletion potential. For mini-splits, we selected R-32, designed to optimize efficiency and reliability in ductless systems.
In 2010, the U.S. stopped the sale of newly manufactured residential air conditioning units and heat pumps that use R-22 because of its particularly harmful impact on the ozone layer when released into the air. On January 1, 2020, the U.S. Environmental Protection Agency (EPA) banned the production and import of R-22.
As of Jan 1 2020, R22 refrigerant has been completely phased out worldwide due to its harmful effects on the ozone layer. It is no longer being produced. If you're interested in learning how to refill R22 in your air conditioner, it is important to know that this is not something a homeowner can do on their own.
NEVER Exceed Refrigerant Recovery Tank Limits
By law, a tank can only be filled to 80% capacity and must be kept under 122°F. It is recommended to fill to 2 lbs less than the 80%. For example, a 30 lb cylinder can hold 22 lbs of refrigerant and a 50 lb cylinder can hold 38 lbs of refrigerant.
The general guideline used when calculating the amount of Freon in a residential A/C unit is 2-4 pounds per ton of cooling. For example, if you install a new A/C system rated for a five-ton load, the system will require 10-20 pounds of refrigerant.
According to PG&E, most central air conditioning systems use two to four pounds of refrigerant per ton of cooling capacity. A three-ton air conditioner would typically have six to 12 pounds of refrigerant for a proper charge.
On average, most residential AC systems require between 2 to 4 pounds of Freon per ton of cooling capacity. However, the exact amount depends on several factors, including the size of your system, its age, and whether there are any leaks.
The most widely quoted rule of thumb is the 100˚ – 110˚ over ambient discharge rule. This guideline states that a properly charged unit will have a discharge line temperature of 100˚ – 110˚ above the outdoor temperature.
The pressure can become high enough for parts of the system to rupture. At the very least, leaks will occur. Mixing refrigerants is not an option either. This will contaminate the system, and the R22 will not evaporate under the higher suction pressure that R410A requires.
To retrofit an R-22 system with R-410A system your line set must not be more than 25-50 feet in total distance. If the line set is longer than this, you will have to replace the line set with larger lines.