Micron Gauge
mobile7 (Platinum member) > albums > H.V.A.C.--->Cooling
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This is probably the most important instrument an HVAC technician should own. You need to get as low a reading as possible to be sure the system has no leaks and is dry inside. This is much more inportant with R-410a refrigerant than the older R-22 mostly due to the type of oil used in the system.
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