Podcasts Business Careers HVAC School - For Techs, By Techs Check The Charge Without Connecting Gauges - Part 2

Check The Charge Without Connecting Gauges - Part 2

Published: June 14, 2017, 6:56 p.m.

In this second part of the podcast, Jim Bergmann wraps up the steps to check a system charge without connecting a gauge manifold.

You can check the charge without gauges if you use the following process (and know your DTD, CTOA, etc.):

  1. Take the dry-bulb temperature. (Let's say it's 70\xb0F in this example.)
  2. Subtract the DTD (35\xb0F).
  3. Add target superheat (10\xb0F).
  4. Check the suction line. It should be 45\xb0F in this example. If your probe senses a temperature that is NOT within 5\xb0F of the temperature you calculated, check the filter, evaporator coil, etc., for dirt.
  5. If the system is not dirty, check the charge with gauges.

\xa0

For a more extensive look at the process in writing, check out THIS article.

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