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Do you burn candles?

It cannot be used for refrigeration.

I created that formula. It's just a linearized approximation of an old Carrier SH charging chart. Nothing more, nothing less.

I had a similar issue. Turned out that the installers had failed to foam the holes that the line sets ran thru. Pulling in outside air directly across the sensor.

I think the equipment manufacturer's size, when different than the compressor manufacturer's size, is typically lower not higher. The compressor has two ratings, one for standard efficiency and one...

And electricity will generate itself.

The internal drain line has a trap in it. It's supposed to be that way. Recommend you sign up for a semi-annual service agreement.

Over the ear headphones are best. You want to block external noises.

I try it without wetting first. If I don't pick anything up then I'll wet it. Using the ultrasonic is an art form. But then not so much different with the electronic. Both have learning curves. I've...

No

If it was loud enough to hear you wouldn't need the ultrasonic. Love mine. Use it regularly, and I also have the Inficon Stratus. The two make a good team.

The capacitor size, or better the correct capacitor, is the one that matches the specs of the motor and compressor. If either of those motors has been replaced, then the factory listed capacitor is...

Sure sounds like a DIY question. Why is this thread still open?

SHR isn't a percentage, it's a ratio. And there's no way that an SHR of .95 is a rating. SHR depends upon the conditions, there is no fixed value. Would be interesting to see what you got that from.

You may think it’s the same. Pretty sure you didn’t have a controlled lab set-up. If you just tap on the breaks lightly you won’t slow down either, or will you?

A dirty coil or dirty secondary hx.

Case rested. Sorry you're having problems with your unit, but your first instinct was "that guy was a crook". Where did that animus come from? He quoted you a new coil, you refused. The end.

I was simply countering the claim that high superheat prevents dehumidification.

Could just be the water shutting down. The water has momentum so will push through the pump for a second or two after power is removed.

I have no details about your installation. In my experience the customer rarely knows where the lines run to. Are you pulling from a well?

I think LP lockout was the problem. Had to reduce the time on it.

It's been probably 15 years since I've worked on it. I don't remember the model. It was a square black Mars type timer, but had 8 (I think) dip switches instead of a dial. Just found an ICM, that may...

Had a Carrier chiller we installed that used a digital timer. My first call on it was that timer. It was set too long.

This was Bristol's preferred method of charging a piston metered system. Commercial Chillers sometimes run the compressor for a fixed time with the LL solenoid closed in order to purge liquid from...

You may have developed a leak and sucking in air when the pump shuts down.

No reason to assume he lied. A crooked tech won't tell you he's giving you a break, in fact a crooked tech would charge you for every little task, even some that weren't even needed. No, that was a...

Time to get another tech out, it isn't the capacitor. It's best practice to use the capacitor specified by the unit manufacturer, but a little bit off isn't going to have a significant effect on the...

I recommend the Inficon Stratus.

Plenty of humid days at lower ambient temps. If the unit doesn't run it doesn't matter what size it is, there's no dehumidfication. If it's raining on a hot day, well even a "properly sized" unit...

Good to see we agree on something. ;)

FWIW, see page 9 of this:
...

The coil is probably dirty. Can't use temp rise to measure air flow in that situation because the airflow will be higher when the coil is dry. To get the coil temperature down to 28° on a clean coil...

Any chance you can get a different tech out there? Sounds like that one wasn't interested in making it go.

Andy isn't on that list. You didn't read what he said.

https://hvacrassets.net/handouts2/February_10_Cold_WAR.pdf

Nothing there about "some loss".

What he said was correct at first, a souce...

And the vapor pocket will condense causing flashing at the receiver inlet.

Here: A guy on another forum who goes by "research" actually did the experiment in a high quality lab. Everything worked...

Subcooling isn't a thing, it's a temperature difference. If two rooms are at different temperatures and you then warm up the cooler room till both are at the same temperature, then "where does the...

It'll go a bit faster. The rpm rating is for a specific load at a specific voltage input, and is always less than synchronous speed.

Could be. If it is, it'll run really fast for a couple seconds and then the smoke will escape. But FWIW there is no standard when it comes to motor wire colors. There are plenty of 230 volt motors...

And yet you think that a vapor pocket can persist indefinitely above liquid that is at a lower temperature. Amazing. Everyone talks about how they've seen SC in a receiver system. These same people...

https://youtu.be/J7UPmaQftYI

I don't have an issue with it. What sort of replies are allowed in tech to tech then? That's what I'm missing. The only other answer I would have had for this particular thread, in line with the...

There is no rule of thumb. The runtime will depend upon the heat load. When its cool out less cooling is required so shorter runtimes, and the system capacity is also a bit higher at lower ambient...

The "best answers" I guess means "call a tech?" You're the one who opened the door to the technical info. JMTCW. Not sure what tech to tech is for, but clearly his post wasn't it. I've always seen...

I'm pretty sure they didn't ship it that way. Somebody swapped some wires on the step controller. It was replaced a few times before I ever laid eyes on it, and I replaced it a couple times myself...

The ADP is itself a state point. For the supply air there is a portion that bypasses the coil. The amount is given by the BF, bypass factor. For the remainder of the air, it leaves the coil at 100%...

Maybe should have left it in AOP?
"I have moved this thread to the "Tech to Tech Chat - Commercial" forum where you will get the best answers."

black

This is just BS, sorry. If nothing else changes the pressure will drop.

I can tell you haven't ever plotted state points. The second point will fall on the line, in fact it is what will determine it.

If you look at a psychrometric chart and draw a line thru your two state points (inlet and outlet air) that line will intersect the saturation line. The point of intersection in turn is the ADP...

I have no idea what you're talking about. I was responding to a post, not yours, in which it was claimed that high SH would prevent dehumidification. I didn't invent the high SH. I realize that...