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The Mitsubishi PUY series will provide cooling down to -40°F. Used a lot in server rooms

UPDATE: Centaur service 866-392-0792

Parts through Hagar 855-394-8933

Incidentally, they want a small fortune for this tiny little compressor

Thanks PHM. Called them, obsolete, no longer available

It is a one door under counter cooler in a small kitchen at a municipal liquor store. It is less than five years old, and they had to take out a window to get it in there because the door is too...

Where are they? Online?

I’ve checked all my suppliers and did a quick web search, and can’t find this compressor. It’s for a cheap Centaur Plus, CUR-28-Q under counter cooler. Any suggestions? R600a.

Good read. I can’t help thinking how much less red tape there was back then. Buy a property, build a factory. No environmental impact assessment, multiple permits, inspections, etc.

You had an empty crankcase. How does reversing rotation fill the crankcase?

You need to follow the manual regarding wire size. It DOES matter.

I can still get MXZ-2C20 hyperheat. Try a different dealer if your current one says he can’t get it.

Recover the charge and weigh in the right amount. Pretty simple.

Remember, the first harvest after a power off is 6 minutes. After that, the eyes determine harvest time.

At one time I tried saving money by buying aftermarket bin eyes. They did not work. I would get a set of Scotsman eyes, and replace them.

Why 2 sight glasses?

You don’t have old Johnson Controls. I was fixing a freezer at a church yesterday and I heard an air compressor fire up in the next room. I’m thinking, “no way, it can’t be”. I go in the room and...

That’s what worked for me on a Mikky D’s meat freezer.

Fan should stay on auto. The system will adjust the speed as needed depending on conditions. Just 20 seconds ago, I heard my fan go from high speed to a much lower speed. If it’s too cool in your...

The diagnoses does sound like a bunch of poo. That unit doesn’t look brand new. Was it running fine, and then started making noise?

Not $0.87. $0.087 x 17,861 kWh = $1,536

$0.87 per Kw

Propane was $3.50/ gallon. We are on an island. Propane only comes by barge when the lake isn’t frozen. Electric is also expensive, so I didn’t even consider electric resistance.

I live in far Northern Minnesota where we spend most of our Winter around and below 0°F; reaching -40° and below for several days. Several years ago, I installed Mitsubishi Hyperheat mini splits....

You’re going the wrong direction. If you’re flooding back, you want to close the valve, not open it.

Adjust the expansion valve to get higher superheat.

18,000 BTU in a bedroom!? I’ve rarely seen a bed room needing more than 6,000. Sometimes 9,000.
Is this a multi head system, or a one-to-one system?

I work on these all the time. Mine have been controlled by tank pressure. Cut in at 310psi, cut out at 295psi. The refrigeration system is pump down with a solenoid valve. There is a high and low...

Absolutely what heatingman said. LEARN ELECTRICAL, especially reading schematics. Get some good HVAC and refrigeration books and study them.
Buy yourself a small oxy/acetylene set, a swaging tool,...

https://youtu.be/jUcEfR7zKW8?si=rwaeO5Wc48IZjVsZ

Here is a video the home owner took showing the “blow off” noise.

Wall bracket. I almost always use a wall bracket unless the house is spray foam. I’ve found spray foam transmits noise to the inside more than normal.

I don’t think so. I couldn’t duplicate the problem, but good thought. Something to look into.

Installed a new Mitsubishi MXZ-3C24NAHZ3-U1 with an 18,000 and a 6,000 indoor head this Summer. Now it’s heating season, and the customer calls today and complains that the indoor living room unit...

Indoor unit model numbers?

Maybe you should have 7.

Well, the ONLY difference between cooling and heating is the pressure in the refrigerant lines. The only moving parts in that unit are the fan motor and the vane motor. Are the refrigerant lines run...

Are your walls insulated with spray foam by any chance? Mitsubishi is usually so quiet that you can’t even tell if they are running. However, we have had issues with spray foam insulated walls...

In 34 years, I’ve never had to work on a Mitsubishi that I’ve installed. I’ve got one running R22, original from factory that is still running in its second location.

I’ve also had those Feral cases with the perforations in the back wall plugged with lint. Also, they are NOTORIOUS for having almost undersized condensers. Make sure you coil is perfect, then take...

Yeah, frost wall, double door, undersized condenser.

I’m sure glad this label was on the wall-hung freezer at McDonald’s. I damn near walked into it until I saw the label.

I use it all the time. The only downfall is that if there is a fire, it will melt and blow out refrigerant unlike braze.

Haven’t used it for a long time, but I believe RX-11 will flush out that oxide.

Looks like the outdoor unit is a match for the indoor evap.

What was the ambient at these readings? What was the box temp? I’m looking for 20° superheat at the compressor. You’re a little high at the outlet of the evap. You might need to adjust the expansion...

Again, there is no such thing as a pressure test unless all refrigerant is removed and system is pressurized with nitrogen. Unless that has been done, all of the previous “pressure tests” are nothing...

Place has two furnaces and two condensing units. Complaint was one of the outdoor units was not working. I found out there was no refrigerant in the system. I added some refrigerant, and within...

I love the installation note you left!

Agreed. There is no way to know if the refrigerant charge is right except by pulling it out and weighing it. This is where you need to start.

Streamlight has EXTREMELY GOOD customer service. I have at least a dozen of their lights, and have never experienced what you describe. I have had some of them fail and I throw them into a box. Every...

What pecmsg said. Pioneer is junk

Water cooled has its place. When the machine is in a confined space, in high ambient conditions, where noise is a consideration.