Check The Charge Without Connecting Gauges - Part 2

HVAC School - For Techs, By Techs · Jun 14, 2017 · 54m

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.):

Take the dry-bulb temperature. (Let's say it's 70°F in this example.)

Subtract the DTD (35°F).

Add target superheat (10°F).

Check the suction line. It should be 45°F in this example. If your probe senses a temperature that is NOT within 5°F of the temperature you calculated, check the filter, evaporator coil, etc., for dirt.

If the system is not dirty, check…