It typically takes less than 5 minutes to pump-down the average residential air conditioner or heat pump. He will definitely save time there. Simply closing off a valve in the liquid line and manually turning on the condenser the refrigerant is stored in the condenser to work on the low side of the system.. Non-Recycling Pump Down. The second type is the "Non-Recycling Pump Down" circuit. Again, the method of pump down is still the same. In this case, if there is any refrigerant migration during the off-cycle, the compressor will not start and perform a pump down. Notice the normally open switch (Hold) that will not allow the compressor to.
In This HVAC Training Video, I go over How to Safely and Effectively Pump Down an Outdoor Condensor that has a Low-Pressure Switch. I show how to Perform the.. To pump down an AC unit, you will need to first turn off the power to the unit. Then, you will need to locate the service valve and use a refrigerant recovery machine to remove the refrigerant from the system. Once the refrigerant has been removed, you can then proceed to isolate the unit and complete the pumping down process..