Check The Charge Without Connecting Gauges - Part 2

HVAC School - For Techs, By Techs

Bryan Orr

Training, Careers, Airconditioning, Self-improvement, Hvac, Business, Education, Refrigeration, Heating, Ac, Apprenticeship

4.8 • 985 Ratings

🗓️ 14 June 2017

⏱️ 54 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

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 the charge with gauges.

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

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Transcript

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0:00.0	This episode of the HVAC School Podcast is made possible by generous support from
0:09.7	Testo and Carrier and also the Dan Foss Toolbox family of applications, free apps for your phone.
0:18.0	The one that I've been enjoying most is the Refrigerant Slider app.
0:21.0	It's the best PT chart app that I found but you can
0:24.4	check out all of the great apps by Danfoss by going to Danfoss.com forward slash
0:30.7	cool apps that's Danfoss dot com forward slash cool apps that's Danfoss dot com forward slash cool apps
0:40.2	Seriously his initials are B.O. for reason.
0:44.5	Brian Orr.
0:46.5	Hello, hello. Yes, this is the HVAC school podcast and I am Brian,
0:50.5	otherwise known as B.O.
0:52.0	Some of my family members call me Bri-Bry, but I don't prefer that.
0:57.6	The only thing that I do kind of dictate is that if you say my name, you need to say it with a
1:02.3	why, not with an eye.
1:04.7	I can hear intent in your voice.
1:06.2	If I know you intended to say Brian with an eye,
1:09.4	you're dead to me.
1:10.7	Today on the podcast we are just finishing up the two-part series with Jim Bergman about how to
1:16.4	check a charge, how to check system operation without connecting a gauge manifold to the system.
1:21.6	So we are going to do that. now a couple things that I want to
1:23.7	mention to you if you're new to the podcast if you haven't listened to it for a while
1:27.5	three things that I that I would like from you I'm actually okay it's it's really
1:31.3	only two one is is that if you're listening to this on a computer,
	...

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