You must use a U.S. DOT 400 recovery cylinder when recovering R-410A. As mentioned above, a standard DOT 350 recovery cylinder will not safely handle the high pressures seen with R-410A. Your R-410A recovery cylinders should be clear- ly marked to prevent any chance of misuse.
Because of the higher pressure, you should use manifold gauge sets designed for R-410A. In addition, you should use a recovery machine and recovery tanks designed for the higher pressure of R-410A. Recovery tanks should be specified as DOT 4BA400 or 4BW400.
ª R-410A operates at pressures 50 to 70% higher than those of R-22. Be certain that servicing equipment and replacement components are designed to operate with this refrigerant. ª R-410A cylinders are rose-colored (PMS 507). ª Recovery cylinders must be rated at 400 psi or higher (DOT 4BA400 or BW 400).
We cannot use disposable cylinders to recover refrigerant. We also need to make sure that the recovery cylinder is used for the same refrigerant as the appliance we are recovering from.
Mixing different types of refrigerant in a recovery tank is bad news. When you return the tank to your distributor it gets assigned a number and that number identifies it and and you as the service provider.
Recovery cylinders can only be used for one refrigerant. For example, if you use a recovery cylinder for R-410a, you can only recover R-410a with that tank. This is to prevent contamination or mixing of refrigerants.
You can find other refrigerants by looking up their datasheets. If you are filling the tank with R410a, you would then multiply the space in the tank (0.419 cubic ft) by the cubic feet per lb of liquid R410a at 130 degrees (54.70). You get 22.95 lbs to fill the tank completely.
Explanation: A recovery cylinder must not be filled more than 80% of its capacity by weight to ensure safety and to account for the expansion of the gases when they are subjected to temperature changes. This limit is set to avoid over-pressurization which could lead to cylinder failure.
Type 3 is a metal lined cylinder with full exterior composite reinforcement whereas Type 4 is plastic lined full wrapped composite cylinders. It is worthwhile to note that both are carbon composite cylinders but the difference lies in the material used to construct the cylinder.
If the outer package cannot be configured by the manufacturer or importer so that it cannot be removed, the cylinder itself must be labeled in accordance with HCS 2012. The cylinders may be labeled through the use of stamped labels, stick-on labels, tags, or other methods.
Is R-410A reusable? With the proper equipment and training, R-410A could be reclaimed for later reuse. Current regulations allow for reuse in the same equipment or in other equipment owned by the same person. Obviously, it is important to ensure any recovered refrigerant is not too contaminated for effective reuse.
When using R-410A you must use a gauge set rated for at least 800 psig (with a 4,000 psig burst pressure on the manifold and the hoses). R- 410A requires recovery tanks and recovery/recycling machines rated for at least 400 psig.
In addition, the AC&R Safety Coalition was created to help educate professionals about R-410A systems. R-410A cylinders were once colored rose, but they now bear a standard light gray color. While R-410A has negligible fractionation potential, it cannot be ignored when charging.
R-410A should not be mixed with air above atmospheric pressure for leak testing or any other purpose. STORAGE RECOMMENDATIONS: Store in a cool, well-ventilated area of low fire risk and out of direct sunlight. Protect cylinder and its fittings from physical damage.
Liquid recovery is fast, but not all equipment can handle the process. Vapor recovery is slower, but is the most common recovery method used. The push-pull recovery method works best when recovering more than 10 pounds of refrigerant. all of your R-410A tanks and have them re-certified every five years.
EPA has approved the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) and Underwriters Laboratories (UL) to certify recycling and recovery equipment.
A 3-cylinder engine can be beneficial for those prioritising fuel-efficiency and driving shorter distances within the city. A 4-cylinder engine equipped car in comparison, will be more expensive to purchase but will offer more power, lower NVH levels and an enthusiastic driving experience.
Type 1: The traditional steel cylinder. Type 2: Steel cylinder with composite reinforcement. Type 3: Composite cylinder with metal liner. Type 4: Composite cylinder with polymer liner.
Type 3 tanks utilize an aluminum liner wrapped in carbon fiber, whereas Type 4 tanks are made with a lighter-weight plastic liner and carbon fiber exterior.
Explanation: Recovery cylinders used for storing and transporting gases must be Department of Transportation (DOT) approved. They are typically color-coded for identification and safety purposes.
Returnable cylinders have a liquid-vapor valve located on the top. A returnable cylinder should never be filled above 80% of the cylinder volume.
The keys to evaluating tank weight and capacity are usually stamped at the tank's top rim or handle, as you can see in the image above. Those values are tare weight (TW) and water capacity (WC). Tare weight (TW) is the weight of the empty tank.
In order to determine how much refrigerant can be added in a used recovery bottle, first the neck of the recovery bottle must be read. This will show the WC (water column capacity) and the TW (tare weight). The bottle can only be filled with refrigerant to 80% of the WC.
R-410A refrigerant prices range from $40 to $75 per pound. To replace R-410A refrigerant in your leaky AC, you will need to hire an HVAC professional since the EPA prohibits handling AC refrigerant without a license.
Average Amount of R-410A Needed for Recharging
On average, residential AC units require between 2 to 4 pounds of R-410A refrigerant per ton of cooling. So, a 3-ton air conditioner would require 6 to 12 pounds of refrigerant.