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How can you safely do a pump down procedure on a home split cycle air conditioning system and what tools would you need?
Wiki User
∙ 10y ago
You will also need to know what order in which to close those valves and what the readings on the gauges are telling you. The pumpdown procedure only takes a couple of minutes, so call a tech for the 1 hour service call. Then call him back to do a proper restart. You cannot Safely do it.
The process of doing this may sound complicated but it is easy for a technician.There are two valves at the condenser, one valve for the suction line and one valve for the liquid line. The HVAC technician closes the liquid line valve and turns the air conditioning on. The compressor pumps all the refrigerant into the condenser coils. The HVAC technician watches his gages carefully and when the pressure gets to zero on the gages he quickly closes the suction line valve to trap the refrigerant in the condenser and then turn the compressor off. This saves using refrigerant unnessarily because the same refrigerant in the system can be reused for the new evaporator coil or air handler. After the new evaporator coil or air handler is installed the HVAC technician evacuates the new part of the system and when completed with the evacuation process opens the valves to allow the refrigerant into the new part of the system. To make sure the charge is correct he uses his gages and the superheat method or subcooling to ensure the proper amount of refrigerant is in the system.
Wiki User
∙ 10y ago
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