Meet John Ellis IAQ Specialist
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- Опубликовано: 5 июн 2024
- Today I introduce to you John Ellis Indoor Air Quality specialist.
John has done and continues to do great things in the industry including training and truly solving IAQ challenges.
We talk about what he is doing today, how he got started in HVAC and some advice for people in the trade or just entering the trade.
Snips Magazine, Indoor Air Quality is not one size fits all
www.snipsmag.com/articles/942...
Podcast with HVAC school on IAQ
hvacrschool.com/podcasts/an-e...
Find him on Linked in
/ john-ellis-b13b0411
hvactoday.com/1021-iaq-soluti...
hvactoday.com/iaq-through-sys...
podbay.fm/p/hvac-school-for-t...
kggconsulting.com/reptalk/how...
kggconsulting.com/reptalk/cre...
Thank you sir, I have watched almost all your videos it's deep detailed information
Sir. I have a question about the Vacuum pump, ..... Why while pulling vacuum it could blow oil (Vacuum pump oil) into the hose?
it happened with me, I would like to hear from you about this subject and the solution on how to prevent it the best way. ...... thank you
It usually means there was still refrigerant trapped in the oil. When the pressure drops the refrigerant boils in the oil creating bubbles. The bubbles flow towards the lower pressure to the vacuum pump. As the little bubbles pop the oil is left behind. Sometimes you can even see the bottom of the compressor frost up. A crank case heater running helps speed that up.
It also does similar when there is oil traps even with nitrogen or air being pulled there the oil.
Sometimes there is also a lot of oil trapped in the suction line. As we pull the vapor out the oil is pulled with it.
@@love2hvac thank you for your reply, Sir. it's a new Instalation I was evacuating the line set and the evaporator only, so when I have finished the evacuation and while removing the appion 3/8 hose I saw vacuum pump oil in the hose and the level of the oil in the vacuum pump was less . I am using uniweld Vacuum pump.
It sounds like you have a bad vacuum pump. That should never happen.
Many thanks sir
Hi sir. wish you and your family good health and happiness all time.......
Sir , a friend wrote this message regarding the vacuum pump problem, please can you read this message to hear your opinion ? thank you
the message...... (( If you didn't isolate the pump from the system before shutting the pump off, the oil from the pump can migrate/travel into the system. Since the standing vacuum in the AC system is stronger than the pump without it running, there is nothing stopping the oil from siphoning out of the pump. Even with high quality pumps that can happen.... If the pump doesn't have a means of preventing backflow then the oil will simply flow back into the hose to fill the void created by the vacuum in the hose. ))
Nothing worse than low humidity warm building, sick building syndrome