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If you consider that the idea of pushing in fresh grease in, is to get the dirty grease out, then yeah, you aren’t accomplishing that until you push out all the dirty grease and see fresh grease...

I can provide it to you as a file archive, if you still want it. But it's about a half gig, also, some of it is not as good a quality as the newest ones that are available here...

Archived...

Oof, I’ve got a church with several dozen of these units, plus the loop controller, all installed in 1986. Anyone else need literature for these, yep it’s at Daikin

That's my point. The bottom connection on the right, the one that disappears out of sight and doesn't go to the coil, is the line back to the evaporator. That's the circuit that does have the return...

It was too late to edit my last post, so here's a pic, you can see that the way the each receiver connects to it's respective coil are different.

http://i.imgur.com/Cc9II3Kl.jpg

I can tell you that this unit definitely does not, because I crawled under there and looked.

System 1 receiver has the discharge line from the compressor manifold, and there's no solenoid valve. ...

So, just so I'm understanding, if it were really cold, the receiver may be overfull of liquid, and this setup is to clear it back down to the proper liquid level?

Why does circuit 1 not require...

I hardly ever work on York stuff, and even less on the scroll chillers. Doing a PM today, and had a question.

System 1 has the HGBP, it's pretty obvious what it is, solenoid valve and adjustable...

7 years later?

Sorry I made a lengthy comment and my phone lost it. Yes I think they are a good idea, I think I just ran into a weak/ bad crimp.

Here's my experience with the first one I ever ran into.

https://i.imgur.com/9Z0ZUQ0.mp4

Every time I have seen the chattering contactor alarm, it’s been dirty coils. The criteria for trip is so fast that even if you are standing right in front of it, you may not even notice anything...

The more I think about it, I think it was right and I was thinking about it incorrectly. Because no matter what the medium, approach is a transfer between substances. So for a water-to-water heat...

Thanks for the link but it didnt answer any of my question, only the term "approach" is in there, and one of their definitions is odd to me , so I'll get to that later.

So a couple of posts...

With regards to heat exchange and chillers, what is the difference between the terms I've seen?

Approach

Small Temperature Difference

Pinch

Leaving Temperature Difference

Is this really a GT, or is it a GTN? T051 sounds like a ComfortLink code, not a Flotronics one.
There's several different things that may occur with that alarm, depending on the SW version of the...

Check that, and also, when you think that one of those compressors should be running, see if there is anything active in the Operating Modes menu

Looks like the one I had when I was 10.

http://i.imgur.com/Gl1xcgdl.jpg
Man, I miss that bike, I wish I could get it back... and the times that went with it.

Right, I’m aware of the pipe stub full of air for water hammer. I know that they don’t work forever and you have to periodically drain the system to get air back in them. I was curious how that was...

How does that work? How can you have vapor sitting on top of subcooled refrigerant? Wouldn't that only provide a cushion if the stub were filled with non-condensables?

I don't know the actual answer, but I can speculate with the best of them. I doubt that time sitting on a shelf matters any. When it's in the system, the corrosion inhibitors are doing their job and...

x2 on the water temp sensors. Are you sure?

How can you differentiate them? It looks like a regular service valve. Doesn't it?

Not sure if your layout is exactly the same, but on small Trane Voyager heat pumps, there's a check valve in the piping that's not super obvious because it just looks like a piece of copper pipe. It...

Just for my own education, what is the difference between this thing not working, and the little dryer vent on the chimney I usually see on new homes? How does that work any better? Is that just for...

ok, so no, then.:(

I don't believe I have the construction and clearance concerns that you mention, but I guess you're right about how much air is going to move through there. And I'm not willing...

Similar to the HW8000, my Aprilaire 8910 allows different fan modes (on-auto-circ) for each of the 4 periods in the schedule. I'm sure there's probably others but that's what I use. I typically keep...

So a delay on make timer on the blower motor? Sure, why not?

I should have sold that box as a

If going that route, may not even need to use any all-thread. Just suspend the motor by that hub, gripped by an external hub puller, with it's bolt through the strut. But support rod would then need...

Same here for my 1950s FPE panel. Stab-Loks, you know, the "Arc Welder" breakers.

I'm no electrician but I've seen that, isn't that common? Power feeds into two breakers, "backwards" into the busbar. Is that not an approved practice?

What controller? Or why are you adding them? If it has a Lennox controller, it should already have them, and if it's not a Lennox controller, you can use whatever type sensor you need for whatever...

I've heard this too, and I don't get it. I realize how a resistor across a current loop give you a voltage available, as described by Ohms law. But I can't figure how putting it in series would...

https://www.weixindustries.com/the-drescher-fireplace-vent/

Or heard of them?

I've been thinking about getting one for my fireplace and wanted to see if anyone had any experience with them....

You shouldn't be losing refrigerant putting gauges on 1/4" flares with valve cores. At least not more than a pfft screwing it on. If you are blowing out a bunch when you take them off, that's a...

Put a hose on it, and crack the valve. Try it upright, then the other way and see which way liquid comes out. Obviously don't blow a bunch out, but a whoosh for a second should tell you which is...

Not really relevant to the topic but you reminded me of something. Carrier 30GTN150 at a school. It kept having oil pressure alerts, turned out that the unit had a bad EXV. Changed that out, and...

Sounds familiar. Here’s the first one I ever worked on
https://hvac-talk.com/vbb/threads/2206034-What-kind-of-TXV-is-in-a-Carrier-40RUAA-air-handler?p=25699291#post25699291

And like I said,...

You are correct about the solenoid signal.For controls, they shouldn't be doing more than sending the unit a start-stop. The unit has some charge management functions that need to be in control of...

Good luck with that system. When I was at Carrier, I worked on a lot of 38APs, APDs are very intolerant of arrangements that don’t follow the instructions exactly. The APSs are even more so. If not,...

So how does that suction valve work? It flexes down like a bowl flattening?

I've had plenty of practice on Carlyle 06Ds and Es, and recently got familiar with a Bitzer which was basically identical to an 06E, but the past few days, I've been working with some Copeland 3D...

May not have been doing anything with em. Might have been laying in the top of the toolbox. Took them out and set them aside for whatever they are doing.
Or maybe Hoss was using them to cut the tip...

:cool: I'll take the wins when I can get 'em

Glad it's not just me. To me, Tranes are green. A weird, olive-gray. Everyone calls it Slate Gray and I look at every swatch I can find where Slate is gray with various hints of blue. To me, the...

Maybe so, but I see no reason this couldn't be 40s, 50s, or even 60s. You know, even in the 90s manufacturers were telling people to quit using soft solder on linesets.
Although my personal guess...

Amazing how when it gets a load on it, you can see the blades bend and the condensation trails form at the blade tips. :cool:

That's cool AF. And in way, I'm glad to see that even the old school dudes were guilty of sloppily wrapping electrical tape all over piping insulation.

Probably so. I would assume that the outputs on the Nest are Triacs. They are intolerant of short circuits and when they fail, it is usually in the closed (conducting) mode.
But yeah, I've done that...