Refrigerant recovery machines for HVAC are an essential piece of equipment that every technician should have on hand. They can greatly reduce the amount of time it takes to service equipment, especially when dealing with high-pressure liquid or vapor systems. While there are many different types of recovery machines available, not all perform equally. Choosing the best machine for your job will help to improve productivity and ensure that you are working safely. There are several factors to consider when selecting a recovery machine, including compressor type, size, and vacuum capabilities.
When looking for a recovery machine, it is important to select one that is designed with the specific refrigerant you are working with in mind. Most units are designed with the same basic parts but some may have features that are more suited to your needs than others. For example, some models are engineered with subcooling loops to speed up the process of pumping refrigerant into the recovery tank. MR45 is the fastest, lightest and quietest machine of its kind with a variable speed DC motor and a large digital display. Its simple operation and rugged construction make it easy to connect hoses and quickly view status messages and pressures on the screen.
To optimize the performance of your recovery machine, it is important to set up all of the hoses and valves as described in the operating manual. This will help you to recover the most refrigerant in the shortest possible time. To speed up the recovery process, it is also a good idea to use shorter hoses. This will allow you to evacuate the hoses faster and prevent the refrigerant from freezing. It is also important to always purge the recovery machine before starting a new job. This will remove any air that could get into the system.
It is essential to follow all safety precautions when using a recovery machine, regardless of the method you choose. This includes wearing proper eye protection, gloves and a face mask. You should also always check the operating manual for the unit you are working on to ensure that it is rated for the pressure and temperature of the refrigerant that you are using. In addition, all gauges should be connected properly to avoid damage from over-pressuring from high-side and low-side pressure liquid or vapor.
When performing a push-pull recovery, it is vital to know how to recognize when the liquid has been completely recovered. This will save you a lot of time, as it will prevent the need to stop and restart the machine. It is also a good idea to always use a sight glass during this process. This will let you see the refrigerant levels in the sight glass and determine if any liquid has been removed.
It is also important to keep in mind that it is a good idea to use the same type of refrigerant when recovering. Mixing different types of refrigerants will cause problems down the road and can slow down your recovery rate significantly. Refrigerant recovery machines for HVAC