Post a reply to the thread: Bypassing Hi/Low pressure cut offs
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For me it's absolutely a no-go to jump any kind of safety switch. That's how bad habits develop. Keep pressure switches and access Ts on the truck; They take no space at all.
I just assume there is no Schrader. You never lose that way.
I believe that law would be the International Mechanical Code.
Originally Posted by BNME8EZ It is my understanding that any safety switch by law can not have a valve in line to isolate it from the system, thus no core in the schrader fitting. Having said that I have seen cores in on some systems. Whose law? Sent from my LG-TP450 using Tapatalk
Originally Posted by BNME8EZ It is my understanding that any safety switch by law can not have a valve in line to isolate it from the system, thus no core in the schrader fitting. Having said that I have seen cores in on some systems. Manitowoc didn’t have a Core in their Fan Cycle Control & if performing warranty works they would not cover the cost of Refrigerant to replace the Fan Cycle. They stipulated a Pinch Off Tooll must be used. https://imperial-tools.com/products/...inch-off-tool/
Originally Posted by hurtinhvac No schrader? Holy crap...this is why it pays to hang out here! Anyone have a picture of this tee handy? https://www.actrol.com.au/product/re...a31851-2712482
I was a young lad.
And the code is only for the hi pressure safety I do believe.
Originally Posted by TechmanTerry I use them so often that I carry 8 (2 of 4 diff types) of them in my regular tool box. Originally Posted by BNME8EZ It is my understanding that any safety switch by law can not have a valve in line to isolate it from the system, thus no core in the schrader fitting. Having said that I have seen cores in on some systems. This thread is almost 6 years old!
Originally Posted by hurtinhvac No schrader? Holy crap...this is why it pays to hang out here! Anyone have a picture of this tee handy? It is my understanding that any safety switch by law can not have a valve in line to isolate it from the system, thus no core in the schrader fitting. Having said that I have seen cores in on some systems.
I use them so often that I carry 8 (2 of 4 diff types) of them in my regular tool box.
Originally Posted by Chris_Worthington Here ya be http://www.rsd.net/search/item.php?i...=JB+A31851-100 Thank you.
Originally Posted by hurtinhvac No schrader? Holy crap...this is why it pays to hang out here! Anyone have a picture of this tee handy? Here ya be http://www.rsd.net/search/item.php?i...=JB+A31851-100
Originally Posted by Chris_Worthington Assuming the old has no schrader core, add an access tee with a core depressor, attach switch and call it done As others have said that is a call you need to make, supply houses are generally open the next day here No schrader? Holy crap...this is why it pays to hang out here! Anyone have a picture of this tee handy?
Originally Posted by hurtinhvac CF motor failing and the high side wasn't elevated? Fan was eventually going out on overload. The maintenance guy would notice it and reset high pressure and walk away. When I pulled the motor all of the oil was leaked our of it.
Originally Posted by Chris_Worthington How long does it take to add a tee and another switch anyways? What about 10 minutes? The cost for equals? not much..... And the strange thing is. The customer will pay you to do that.
Originally Posted by coolerik really, whats the worst thing that could happen..comp will trip overload or the breaker...worse case your comp will plow the internall relief or if its a bigger system blow the relief and there goes a few hundred lbs.....doubt its gonna hurt anyone not like jumpin a limit on a gas fired appliance still not reccomended by me, but i doubt its gonna hurt anyone maybe not physically hurt someone, but if a service provider jump out a safety and my unit blew up. That vendor would buy my a new unit. regardless of the age of the unit, the hurt comes from not having a job or a bad rep. My advice, record everything, do it right and inform the customer, if you cant fix it before you leave lock it out or pull the fuses
Originally Posted by hurtinhvac In case you are after hours and didn't have one on the truck. May I ask what "tee" you refer to? I thought it was a simple matter of a threaded/schrader fitting? Adding a tee to the low or high side will allow you to add a new pressure switch without losing or having to recover any refrigerant.
Originally Posted by hurtinhvac In case you are after hours and didn't have one on the truck. May I ask what "tee" you refer to? I thought it was a simple matter of a threaded/schrader fitting? Assuming the old has no schrader core, add an access tee with a core depressor, attach switch and call it done As others have said that is a call you need to make, supply houses are generally open the next day here
Originally Posted by Chris_Worthington How long does it take to add a tee and another switch anyways? What about 10 minutes? The cost for equals? not much..... In case you are after hours and didn't have one on the truck. May I ask what "tee" you refer to? I thought it was a simple matter of a threaded/schrader fitting?
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