Evaporator Coils and Shipped Nitrogen Pressure

       We've had a few concerns with newly purchased equipment (evaporator coils) so I thought we would address it.

      Some have stated when the open the coils up and are ready to install, they notice that there is sometimes, little to no nitrogen pressure in the coil. This is possible, but rather uncommon in the last few years or longer. Nitrogen is used in the evaporators by some manufactures for testing, and then sealed up with the tested pressure, this amount can and will vary between manufactures. 

      The main purpose of the nitrogen is to keep the coil free of contaminants during storage and shipping (atmosphere). Some manufactures have elected to reduce the amount of nitrogen charge in the coil for shipping.

       If you suspect a newly purchased evaporator has a leak, take a moment and pressure test it in the field, and document your findings (picture or video) and see if there is an actual leak or not. I mean you already have a tank of nitrogen on site with you (or you at least should). This could save you the hassle of driving all the way back to the wholesale house just to be told there's no issue, or have the manufacturer deny your warranty claim for "No Fault Found". 

Remember " IF YOU ARE NOT TESTING, YOU ARE GUESSING".