Vacuum pumps are component of among the final procedures in the repair process. After you’ve Ac Vacuum Pump diagnosed and repaired any leaks or additional issues in the machine it’s time to recharge. Before recharging you really want to make sure the system is free from any undesirable gasses, air, or drinking water. If they were to remain in the machine, it could turn the oil it operates on into sludge and keep behind damaging impurities.
The draw on a vacuum pump is usually broken down into its “CFM,” or Cubic Feet each and every minute. To estimate what your CFM needs, consider the tonnage of the 
systems you focus on. Take the square root of that number and you’ll get the approximate CFM you need to have to work with that system. Typical residential systems need 4-5 CFM, while commercial and rooftop systems generally require as much as 6-8 CFM.