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That's exactly how it's setup. None of the 4 systems have any form of compressor unloading. It's all through hot gas

Quite simply, the noise. Cant risk doing all that work and have it resonate throughout the building and the floor below. If the equipment was going outside we would consider it but i have yet to hear...

Good evening gentlemen. Hope everyone is having a good Friday.

Today I was made aware of a job we will be doing for the next few months. We have been tasked with retrofitting 4 indoor air handler...

This equipment is custom built in every way. No rating plates to be found anywhere. In fact, it's the biggest chamber I have ever seen, thus it being a nearly one off deal. It's large enough to park...

The same thing. On a close coupled system add a little POE and it should come back ok but it's still designed for use with POE. I can assure you it works without a complete oil change but your always...

I had one, I think it was Turbo air.... anyways, the discharge line got pinched when they moved the fridge out for cleaning and back in, it got pushed too hard on the wall mounted receptacle box....

more or less you are correct

yes but this equipment is very critical and very sensative so there is no guessing here lol. Funny how for something so important, the books were just laying around....

I have an old one that I maintain at a facility we have a PM contract with. Basically one of the engineering students threw out the binder with all the service notes, literature, essentially...

409a doesnt work so well with freezers. Probably time for a new condensing unit + TXV considering the age.

Put a few oz of POE in just to be safe, It should be fine.

The right thing to do would be to dump the oil and change it entirely to POE.

R410a
365psi @ 110* SCT + 14.7 / 118psi @ 40*SST + 14.7 = 2.86 : 1 CR

407c
261psi @ 110* SCT + 14.7 / 63.1 @ 40*SST + 14.7 = 3.54 : 1 CR

So a 20% capacity loss from compression ratio?
Would...

But the idea works for both heating and cooling... anyways, im off topic lol

So frankenstiening my current piece of garbage goodman ac....
Can anyone chime in on capacity reduction from switching...

Thats the beauty of my plan when I get over the renovation hump. Currently im using a 2 stage furnace for heat in the winter but as we have such mild winters where im from even on low fire the house...

The house I currently live in came with a slightly oversized AC system when I bought it (2 Ton, only really needs a 1.5) and this spring I plan on installing some more insulation to the upstairs...

I have used it in 3 situations where it was the only option as repair was not really feasible or possible. I had good results each time.

One situation was on an old beast engineered air muau. 40...

The glide is not an issue once you understand how it works and what it means. Most p/t charts take into account the glide % anyways.

As for the higher discharge, thats the price to be paid for...

What is the reason few manufacturers seem to shy away from the r32 component? It seems like the blends with the smallest capacity loss contain some % of r32 in the cocktail. What about the...

Well looking at the msds, it looks like the additive is a hydrocarbon component which makes sense, as thats whats in the blends.

My wife kept complaining about how the a/c in the car doesn't blow cold (out of gas). She came home one day saying she wanted a new car. Funny how that A/C started working the next day. Well, guess...

I ended up going back today to recover the charge and use 407c. I tried out some Cliplight Super Change oil bonding additive. System pulled down much quicker with 407c. As for the oil return, only...

yes, i would like to put 407c in but i have billed out so much time today trying to make it work that i cannot justify spending more for a proper oil change. Going to have to wait for something to...

Middle of last summer our company started to consider using alternatives for R22. My vote was to stick with R22 or change to R407c when possible due to the fact its the closest performance match. I...

Sounds similar to an experiment we tried at work. We had an old R12 reach in freezer that was converted to 134a (bad idea) and it wouldn't pull down enough. Recovered the charge and substituted it...

Really? I have had the opposite experience. I can see there being room for error with the product being so simple but as long as you get a good oil splatter on the paper they usually work.

What he said.

Really any acid test kit will do. I carry about 5 -6 of those QwikCheck tubes (P/N QT2000) that you just push over top of the schrader and it sprays the little chemical paper with a...

Shameless plug for a fluke 116. 40Meg Ohms

Scott you think thats bad?

Our company used to be Taylor authorized. All of us took the required training and satisfied all the requirements to get full service, support and a better discount on...

Malco

I have had the same 5/16 going on 4 years now. my 1/4 would be the same but i lost it last year.

http://malcoproducts.com/product/hvacr/service/nut-drivers

The water level in the basement was a concern of mine, but it doesn't seem that any components were exposed to water besides the vapor sensor.
I just thought id ask if anyone tried.

The particulars are the sensor got wet and i want to replace it with a flammable vapor sensor from off the shelf. Im not bypassing anything or even doing anything remotely unsafe. The difference...

A friend of mine had his basement flood Saturday night and the flammable vapor sensor on the bottom of the hot water tank got wet. I tried drying it as best I could but the black residue they paint...

So as long as the moisture indicator indicates dry, moisure is at a minimum? Will an oil sample on a refractometer show moisture content? I have only ever used one to confirm % of MO to POE.

OK so after a 20 min standing vacuum test the final reading was 800 microns - this was after breaking with nitro twice and having pump on for 14 hours total. Charged up the system and ran the system...

I have a system that had a ruptured water cooled condenser. Long story short, will the final micron reading tell me if the POE oil will need to be changed due to the presence of moisture?

What i...

This project is a test pilot for the other 5 units on site. If i can put something together with locally sourced components the other units will be much easier in the coming years.

I have an account that sprung a leak in one of there dry clean machines condensers. The system is from italy and OEM replacement parts are 17 weeks away so I have been tasked with trying to find a...

The first compressor was covered under warranty, so technically he has only put 2 compressors and a high pressure cut-out into it.

I was just looking at compressor performance data to get a better idea of where the operating envelope is. It goes up to 140*F condensing (AE4450Y) so thats where im probably going to set it.
Its...

This will be compressor #3 im putting in tomorrow on this prep table in 3 years. Just out of warranty... again. Customer just cant seem to remember to clean the damn condenser on a regular basis, so...

What causes the bread to be too dry after the bake?

Assuming the humidity is fine, what could be the issue?

Its my understanding that 404a rated compressors are now being shipped in most cases when selecting a replacement for an r22 compressor.

For example, if i had a 1hp medium temp R22 compressor...

Thats one way to get to the rating plate! :grin2:

The 116 is will do 90% of what you need. The 323 is alright for a basic meter but i have yet to use it for anything but checking amperage and even at that its just passes.

For the money, the kit...

Ah, the home made PHM r407c. I had actually done it a few times when i was in an emergency situation without enough r22 to fill the system. If the compressors already poe charged, why not.

Honestly i just use a yellowjacket 68802 charging scale. Its easier if your using a 25lb jug of 134a because the weight keeps it down and its easier to zero out once the liquid inside settles.

Did you physically see the waxing on the cap tube? I would try and get another one of those crappy spun copper driers and change it out just to be safe. It's not very often that the cap tube can be...

Not a bad idea. I might do just that.

Thanks.

I want to put a 6" mechanics vice on the truck but im trying to think of somewhere handy to bolt it down without it getting in the way all the time. Anyone have any ideas for something easy to setup...

Yellowjacket 60290. Does up to 1 1/8.