I demonstrate how to ohm control transformers and contactors.
HVAC ohming control transformers and contactors
April 6th, 2010 
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Posted in Videos 
Tags: air, betterthanbob, conditioning, contactor, Control Transformers, DrZarkloff, HVAC, Hvac Control, HVAC/R, ohm, Starkloff, transformer
Thank you very much for watching. I’m glad that you’ve learned a lot from them.
Thank you very much for watching.
would dirty oil in a compressor damage the windings the original grounded out the replacement was changed without a suction dryer filter oil was burnt
The dirty oil could damage the new compressor. Acid will destroy the motor windings.
Dr Z. thank you very much for the input it is greatly appreciated.
my boss taught me to charge units using the 20 degrees split i was curious how accurate is this?also the head pressure should be @ 200 and back pressure @ 40 degrees below return temp can this system be used?
I’m not too sure about what you mean by back pressure. I’d stick with superheat and subcooling methods.
Thanks for watching.
hey DR Z, when you get time can you give us an intro to economizers and frequency drives… I would really appreciate it!
Hello Dr Z. So when checking the leads on Tran’s. If it’s bad your meater will read OL Rite.Thanks
Yes, Open Line means the wire is bad.
Very good video, Thanks for your time helping a lot of people. Good jobs.
Thanks for watching.
So if my primary contacts don’t get a reading on my transformer does that mean it’s bad? I checked the secondary and they do get a reading. So I don’t understand how the primary don’t get any readings but the secondary does. Do I need and new transformer ??
I think that it’s really weird that you don’t get a reading at the primary side. You might want to check your meter.
Doc…a coat in the sunshine state?
lol. It can get cool in the Winter.
Better see some steam plant operation videos…lol
thanks a lot !!!!!!!!!!!!!!!!!!!!!
Salvaging parts?
Your videos teach a lot. I been working in maintenance for 10 years . By looking at your videos I have learn a lot and also I compare the hv/ac equipment on my work site and they are almost the same. Your videos help me a lot, and I am going register my self in tecn. school in NY. thanks.
Very cool. Keep up the interest.
I always cannibalise from condemned systems.
You help alot of people with your very informative videos, THANK YOU!
@quantumsignature Thanks for watching.