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lol

if((AI1>70DF)&&(DI1=DI2),ON,OFF)||IF(AI5<108,ON,OFF)||IF(AI6<108,ON,OFF)||IF(AI4<195,ON,OFF))

if you can not see the sarcasm or demonstration of my post, I can't help you.

Service Meat Warm, Found Rack low on refrigerant, added #350 of R22 to 20% Reciever. Leak Checked and found schrader core leaking.

Hilarious. (and always noteice, on reports, few will detail...

you know, good thoughts. oil trips, he starts walking around, sees the foam, and focus is on that rather than perhaps something else.

Been there myself a time or two or 200.

or if he's front...

impingement can most certainly do what I describe.

I have seen tears behave in all kinds of goofy ways. Small tears can most certainly make the oil have high concentration of gas. and depending...

what screens did he check? Inlet screens on the oil regulators?? Or was he referring to pick up screens?

JP, I reread his post again, carefully. lol. if the separator was not doing squat, he...

what I would do now is. Front seat the outlet of the resevoir to the compressor oil regulators. Just sit and watch how fast it fills.

Another question. Being a helical, is your load changing...

so that actually helps me more then. I don't think this guy is separating very well.

So disregard. I thought it was impingment.

I wonder of this thing is sized correctly then.

what can go wrong with a helical separator. I have not seen one go bad, get plugged or otherwise. What have others seen??

To go from a helical to an impingment process oil separator, that...

you pulled the bottom plate, but did not look up inside to inspect the impingement screen?? No Bueno.

After Making sure rack header superheat is not low. I would:::

Just to start somewhere,...

good point

I messed with easy IO once, for a industrial boiler application, and all I did was wire the transducers, set the range and wala, they read good. It also then seemed very easy.

simple food proccesing things is what I am looking at. We take care of som food processing places that, they have custom slicing, dicing, water washing, conveyor stuff. mostly, simple start, stop...

I just downloaded LOGO the other day, it' a Siemens PLC software. I have been trying to devour and digest PLC stuff so we can open up our repertoire of services. Here in Metro Detroit, there is a...

how long does it take to pump out the collection tank?? How critical is this collected water??

Why do you HAVE TO use barometric pressure as your monitoring value? Seems overly complicated to me....

I was once told by an instructor not too long ago. Someone widely respected. Someone who has taught complex ideas to a lot of different people. He will tell you, not everyone has the mental...

no good controls guy should have the attitude that he does not do any manual labor. In the refrigeration world, you can't get around it. You have to be able to be as good with a wrench as a laptop....

no good controls guy should have the attitude that he does not do any manual labor. In the refrigeration world, you can't get around it. You have to be able to be as good with a wrench as a laptop....

I have been much more involved with dealing with customers, vendors, ect in recent months. I find it difficult, tiring actually to get all the other pieces of the puzzle, like this guy, and that guy...

This vav controller is somewhere in between on the daisy chain network, and it is the only I am having an issue with.

I did not verify, is the rnet and bacnet plugged into the right slot or...

Thanks guys. I very closely looked at both the rnet and control termination wiring into the vav controller. Saw nothing goofy, touching ect.

The LCD on the rnet sensor, I called jibberish, is...

well, as I am just cutting teeth with HVAC controls, I have a simple little office building I was asked to look at Friday, going back tommorow.

Need some help. Okay. Have an IVU Open web...

Crab,

We also can not run SCT so low. A benchmark for most Rack refrigeration for low limit is 70 SCT. We are at 0 HZ at 70 SCT.

I think what I interpreted when Freak first described what...

No, the fans should run and ramp up and down to maintain the TD. Condenser design TD. So bring a transducer in, convert to temp. The fans would run as fast or as slow as needed to maintain the...

are the fans staged with way with compressor staging?

hey Freak, this sounds like a refrigeration condenser that I do all day long. Let me ask a few questions. What is a bank to you? Pairs, or one side?

Typically. You would ramp based on TD of...

I already answered. But. Yeagh. That dude knows his stuff. By all accounts, likely the best at the reefer controls game. I admired what he has done in his career, and his teachings had a...

ok. well cool. I enjoy your site. I liked the videos.

No. But I learned a lot due to Pete.

Did you move from San Antone?

The only argument I have ever heard about this is, to bypass the drive, if and when you meet a monitored condition of the drive being at 100% for a period of time, so logic would be: If at 100% for...

in refrigeration, we have to have a bypass arrangement. Whether it is a condenser, suction, ect. So. I have seen this practice of using the bypass in addition to emergency duty, obviously, but...

I don't know.

If a VFD has to output 100% of duty for weeks during high demand, it has been always taught to me that it is good practice to bypass drive during that time.

I want to know why?...

and yes the condenser fans.

And controlling fan speed of an evaporator to dehumidify as well.

Not to burst anyones bubble, saturated suction temperature as a value to control the variable speed of the compressor(s) has been a long and widely used practice in commercial refrigeration.

Here is a better way to think about this. r22 just happens to have such a composition that it can have excessive discharge temps under normal compression ratios. But anything with excessive...

high compression ratios are so related to high discharge temperatures no matter what gas or temp. Page 3.

http://www.hvacrinfo.com/cope_ae_bulletins/TAE1268.PDF

I wonder if any of you guys agree with me that, getting into the HVAC or R control world, is all about understanding yourself. How do you learn things. How well can you teach yourself things. How...

Joey,

That looks like a damn mess. LOL. A long time ago I got a killer deal on a very executive like desk, and so I got a desktop and a laptop, nice wireless printer, and a 46" screen. It has 2...

This may sound a little far fetched, but go out and buy a couple grand worth of crap. And put it together. I just bought a PLC controller and learning basic PLC stuff as we speak.

You could...

So this one specific circuit is starving liquid when any of the other circuits are in their hot gas defrost sequences? Yet all the others are getting the liquid and running decent?

And the...

ROTFLMFAO.

Your not seeing the obvious here. It would smack you upside the head if it could. I am not going to tell you the answer. I think I got a good hunch on whats going on.

I am gonna help you...

Your defrosting case supplies the header with liqid during hot gas dedrost. Not the reciever liquid.
How is it only this one circuit starves?

Your a fellow cheesehead, dont embarass me here. ...

Dude. How are the rest of the circuits getting liquid, from the defrosting case.

Well. Its not gonna get liquid from receiver if its working right. The liquud manifold is supplied liquid from the defrosting case. Remember the header should be at a lower pressure than the...

Yes, You have NC-2, with LIQUID FLO. So, if the drop leg temp is above 70, like it should be now in this ambient, Natures Cooling Bypass is OFF De energized and not bypassing, and the Liquid Flo is...

So, if that was not enough to be confusing. (I had to reference my manuals, for this next part I admit). They added some bull $hit to the NC-2 arrangement and called it "Liquid-FLO". Using the...