Charging Central Air System

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Charging central air system.

Ac systems with a low r 22 charge do not perform at peak efficiency. The total heat in the air will be the driving factor for the evaporator performance so low or high airflow will have a direct impact on the charge and the system. Check pressure and temperature readings and determine if more refrigerant is needed. Charging a 410a condensing unit is the same as charging any unit only the refrigerant is different.

When charging a new system or recharging an evacuated system the refrigerant is added by weight according to the system specifications but trimming a unit or adding to an existing refrigerant charge is less precise. Recharging a central air refrigerant involves hooking up the gauges and taking accurate temperature reads but it also requires an epa certification. Air conditioning systems are designed to never leak refrigerant. Central air conditioners are designed to continually cool the home to the desired temperature of the homeowner.

Of course there are times with an air conditioning system loses refrigerant due to leaks or maintenance. When your refrigerant level runs low the heat transfer does not take place and the unit while remaining functional and blowing air will not provide cold air. For step by step written instructions check out https www hvac for beginn. Your central air conditioner works by performing a complex form of heat transfer with the assistance of a chemical refrigerant.

Because these systems do not control superheat it is critical that the airflow be as close to possible to correct prior to charging as the system will be charged to the airflow. Most homes with an air conditioning system manufactured before january 1 2010 use r 22 as the refrigerant. The ac compressor circulates the refrigerant through the system s pipes metering devices and coils. How to know if a central air conditioner needs a charge.