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NW KS | I have never been able to get straight propane to work. I have tried it in systems with orifice tubes and ones with expansion valves. Every time I have tried it it lacks cooling capacity. You might be able to get some cold air on low fan speed but never on high. This was with bulk propane from a 20lb bottle. The compressor and expansion valve just aren't designed to use propane. Propane matches r22 very well but not r12. R290 and R600A blends are supposed to solve these issue(redtech, Envirosafe, etc). I haven't tried any of the blends but I want to. | |
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Charging AC system with R290
