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Hey Kid ! Excellent advice ! I think evacuation and leak check is two of the most frustrating procedures a tech is faced with .
Both take time and patience.
The triple evacuation method with...

Ah ha . I see says the old man . Nonetheless. It seems as though a good long look at the vacuum pump and it’s attachments are in order .

Please clarify for me : Three 24 ton units ? Y system ? Model numbers please. Mr slim makes 24 ton outdoor units ?
Or is this a city multi project?

Just updated my e mail in my profile now I’m locked out of the pro forums !
Already contacted webmaster .

This sucks !
I feel like a real ho !

Vfd might be a problem with electric heat . You might trip high limits or burn open fusible links if your not moving enough air across the strips.

A Rawal valve on first stage and a dehumidistat...

Also try unplugging monitor stat from connector board at ribbon cable . Check appropriate voltage supply at board terminals and re seat stat ribbon cable into board .

Which generation ? Check all the rotary switches ?
how many slaves ? Monitor a standalone or controlling an associated damper ?
I'd be happy to try and help but much more info needed .
System...

Gentlemen Thank You for the clarification.

So just to be clear so as I comprehend this : The final answer here is mass flow does not change with a change in temp in a closed system . But cfm does . Correct ?

If that's true then why do we...

All I'm saying is an approved tank heater for refrigerant bottles is the best way to go. As far as torching the receiver . What about those little fusible plugs on some ?
Got to be carful there aye...

Judging from the news clip, seems like super heated water boiler . As said here before . Best guess would be some kind of fracture in the vessel and a narrow escape path for a whole lot of water to...

BUT WAIT ! Re thinking this : If I apply laws of thermodynamics as in a refrigerant compressor .... mass flow rate of refrigerant does decrease with an increase in density .... so..... crap it's late...

My school of thought is : 10 k cfm occupys a given area , driven by a constant . So. Cfm stays the same , molecular structure changes by added btus so ... density changes but .... volume stays the...

Come on Wayne .... Please just say I'm right or wrong ...
can't take the suspense ....

Answer : Mass flow = 10,000 cfm

Horrible tradgedy . ! High pressure steam no doubt. Wonder if it was a dry fire situation or a fire side mishap ? Just horrific!

Wow ! Now I'm really sorry I brought this up !

Yes PHM , cross keys .
Guys . I'm sorry I even brought this up . Meant no disrespect. Just get nervous when they're buzzing around the house .

How bout a 3 or 4 inch wide x half inch deep or so trench around the perimeter of the fence . Spray the trench with 7 or a similar product .

Double up some strips of weed cloth . Place that in...

Guys . I apologize if I offended anyone . That surly was not my intentions here . I guess your right . I shouldn't watch so much news .
It just seems like lately every time I turn the tv on I'm...

Dammm ! I got bills here totaling about $600 bucks for cable, internet , net flicks , and that lovely cell phone family plan.
Yup I'm a slave to the telecommunications companies!

But the wife...

Liquid , liquid , liquid . More specs please .

Gents . Please don't misunderstand me here .
I live near a small south jersey airport . It seems like every day when the weather is good these planes are flying around up there doing loop de loops...

No Sir . All due respect, I'm tired of hearing about innocent lives being lost from these small planes crashing .
I think it's well within ones right to choose to be a pilot of a small aircraft, we...

How many more deadly small plane crashes have to happen before our government does something!

We got to ban these small planes from flying over populated areas !

Every day ! One crashes into...

Thank You ! I feel a little better now ! Christ , that was like waiting for the news when my first wife said she missed her time of the month and went into the bathroom ! Thanks brother !

Ok. So . Please help me out here people ! My OCD just spiked!
I've been using anti blow back hoses for years now .
I replace hoses once a year .
Someone please tell me I've not been getting...

Gentlemen , THANK YOU ! . And CH 4 , Thank You . I try not to be a d....
Although sometimes my teenage kids may think differently. !

But seriously . I was just trying to tell the op that...

Ok . So.
Once again condensing temp I am referring to is a calculation. Simply what I'm saying is converting the head pressure to temp.

So. 95 degeee condensing temp with r-22 = 180 psig.
If...

Sir . All due respect, we are not taking about a 40 ton unit here. That would be referenced in my other post referring to the need for condensing temp maintaining control and capacity controls to...

Beenthere . Sir , I most definitely agree with all you have stated . I must preface this by saying : I by no means claim to poses superior knowledge than anyone . I continue to learn everyday, and...

Design conditions in this application :

Properly applied and installed matched system components.
Properly designed and installed air distribution system .
Proper amount of air flow thru both...

In this case the typical C.A.C. will indeed operate and cool as stated .
But it will not operate properly with respect to preservation of eqipment component integrity and longevity.

Unless ......

With all due respect to everyone . What I want is for everyone to please understand that : I am of the opinion , (opinion being the key word here please ) ,
that one cannot use the systems...

Sir . Please explain your disagreement with my statement a little more in depth if you would be so kind.
I do apologize for the 100 post minimum for pro status . I thought that's what the...

Well Mr . Murphy . I certainly appreciate your comment . NOT !
That said , I would again challenge you Sir to read into my statement and offer a reply of substance in reference to what constitutes...

I can't give an in depth explanation in this open forum . I will ask that you read into what I've stated . Please get your post count up to 100 and apply for professional status and I'd be more than...

Only when the coil needs a rinse

Here's another classic case of attempting to perform a system analysis without stabilized system parameters .

The readings are irrelevant in this situation and cannot and should not be used in...

No Sir . This is exactly why evacuations in low ambients can be frustrating. Good Point !

Looks like a leak rate to me ?
More importantly: Do you agree with the theory of a dry nitro sweep helping to boil the ice to vapor after a re pull to 500 mics ?

The other thing is . I always...

No . I think the ice would have vaporized . But not in the jar. He obviously had a leak

I think the bigger message here should be the importance of triple evacuation. If there were a way to do a nitro sweep on the jar , bet ya the repulldown to 500 mic. would have gotten rid of the ice...

Hurtin . I really like that one tooo !
Question : Was the ho on the bowl ? Just sayin ....

Ditto !

SORRY : NEED TO EDIT HERE : TORCHING IS A PROCEDURE ( I WOULD DEFINITELY NOT) ( NOT ) RECCOMEND TO ANY ONE , THANKS !

This is just my humble opinion . So please let's not get bent out of shape here :
All due respect : The practice of torching the receiver or any other part of the system under pressure is not...

This does not sound like a refrigerant issue at all . The short cycling is more than likely being caused by control issues . ( Low pressure control, solinoid , pump down issues , etc, )

Please...

" I'm here to service your Liebert in the data center "
Halon Release !
I'm on the phone with my tech : " What happened Chris ? ( Name changed to protect the stupid ) " You know we have a...

GREAT STORIES GUYS !
Many thanks to the o.p. !

I say we let this thread run for a few days then vote on the best war story.

In other words : which story by popular vote wins as the worst...