The Condenser

The condenser contains the compressor, condensing coil, capacitors (one for the condensing fan motor and one for the compressor), condensing fan motor and contactor (these are included in most condensers but the more advanced ones will have some additional parts).  The condenser takes the high pressure vapor coming out of the compressor and turns it into a liquid.  The way it does this is by transferring the hot gas to the outside air.  Hot air moves towards cooler air.  The temperatures in the condenser can be around 200-250 psi for R 22 on a normally hot day.  If the outside temperature is 90 degrees and the condenser is showing 250 degrees, which would be seen on the gauges hooked up to it, then the condenser will transfer the heat from the refrigerant to the outdoor air.  If you take a thermometer and put it next to the condenser and it shows 90, for example, then move the thermometer above the condenser fan motor and you should see 10-30 degrees higher temperature than the outdoor temperature.  If you have a dirty coil the heat cant escape as well and therefore, it lowers the efficiency of your system.  To make sure the liquid doesn’t turn into a vapor and then a liquid as it travels to the metering device we want to make sure it stays cooler than the condensing temperature.  This cooling of the refrigerant is called subcool.  Usually in the liquid line, smaller copper that comes out of the condenser, will have a cylinder looking object in it and this is called a filter drier which is used to catch any debris or moisture.  If you see a bigger filter drier on the suction line, then that is put in only when the compressor has failed and shouldn’t be left in for a long time.  It should be taken out of the system within a month’s time.

Published in: on May 15, 2010 at 4:19 pm  Leave a Comment  

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