That is actually condenser.copper tubes usually fins are copper or aluminum and compressor and couple valves that use Allen wrench to loosen or tighten.if compressor is good you can close high side( the small liquid line) manually trip relay and use compressor to suck refrigerant into the coils of that condenser then close high side( the big one and cut line without loosing any refrigerant.new units come charged for 25 feet(if I remember right) weld the lines pull a vacuum and leave it for a bit to test for leaks.hook up guage or get out thermometer and adjust charge.watch it when you get these that they don't have refrigerant in then.it will mess up you day if you inhale some.oh there is fan and motor that sets in middle blowing air up
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