Question about Whirlwind FH-778 Air Conditioner
First you have to have a EPA certification too purchase, and to handle Refrigerant. in order to stop the leak first it must be located and in most cases soldered shut depending on the leaks location if the leak is in the tube sheet of the coils it my be better to replace the leaking coil. if the leak can be repaired the refrigerant must be removed from the system, leaving it in a vacuum then bring it up to atmospheric pressure (0 psi) using dry nitrogen. then the leak can be repaired, after leak has been repaired pressure test system at 120 psi for 20 min. watching gauges to see if pressure drops. If pressure holds, release nitrogen then evacuate system with vacuum pump. most manufactures require a 500 micron of less vacuum to ensure no moisture is in system then charge system according Manufactures Specification. charging and service ports are normally located at outdoor condensing unit where copper piping connects too condenser, charging manifolds are a necessary tool for this repair. I would highly recommend having a HVAC contractor preform this repair, amount of refrigerant that goes into the system is critical to performance of heat pump operation.
Posted on Sep 16, 2010
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Posted on Jan 02, 2017
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