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Thanks

Any idea what to torque the screws?

True enough, hadn’t thought that far

Do you think that discharge piping might be a problem, maybe turn the volute while you have it apart?

That piping is something else! did you have to work that out yourselves? never did a Tri-Star

Isolate the filter, the regulator can be removed, no need to pull refrigerant

A piece of 4” pipe, threaded at both ends. Drill holes in one cap, silver solder 5/8” flare adapters, attach a “dip” tube to one, reaching to bottom of pipe. Two layers of armaflex around a five...

What’s going on, what’s the concern?

Replaced PWM module a month ago, original was not showing pressures or temperatures properly, no LEDs burning on backplane board, replaced module, powered up, LEDs lit properly, pressures reading...

Very nice, you had a good teacher

CGAM with waterside economizer, year round cooling

Thanks, again

Thanks, jayguy. Will it be more noticeable at high load, or low load?

How does one identify carry-over or overcharge when working on a CVHF chiller?

Lacquer thinner all the way.

Does anyone have one that hasn't had failures?That would be something to study.

There is a vane position switch upgrade.

Inside the oil tank is a flared coupling, if this connection is not right, the slide valve can't back off properly.

Cool pix. How did the flange change out go? Gotta love tight spaces.

You lose approximately 25% of your heat transfer rate in a 50/50 mix. You're gonna run lower suction pressure, or higher head pressure, equipment needs to be selected for expected fluid...

We usually tee into the purge unit on enough tanks to catch what we figure is left, running condensed liquid back to the tanks, isolating the purge from the chiller, works great.

Try replacing the cable, or swapping the cable to see if the diagnostic follows.

That's the one, Thanks. Any new ones? How about gantries? We are converting two CVHE100 chillers, tight room, gonna be a challenge. I'll try to post pix, if I can figure that out, again. Thanks again...

Some time ago, we posted some pictures of tools we'd made for taking apart chillers, I'm searching for the posts but can't find them, anyone know where to find those pics? Cheers!

We have a customer, with some RTHD's and RTHC's, they've purchased some APEX3 coating and sacrificial anodes from their water treatment provider, and want us to apply it/them. I've got the info from...

I'm wondering if and how you guys treat condenser tube sheets, do you sandblast, what repair products you prefer, what doesn't work?

How carried away do you get with tube sheet corrosion? I wonder if I'm over doing it? What kind of problems have you had?

Have I told you guys about this skating rink I've been babysitting? An RTAA 125 cooling 50/50 glycol to 17*, ambient temps as low as -30, with wind. Before xmas, I was resetting low suction press cut...

Just removed solution from our last Trane B2D-4, last fall. The economizer heat exchanger tubes were plugged, customer put in d/x coils and air cooled condensers. There are still a couple at a mill...

How do you guys lift the compressors, we have two RTHA's with leaks at oil tank flange, we lifted the rebuilt compressors at the two recommended points, wondering if we should have supported the...

How many feet of what diameter of what type of pipe? length x area=volume, volume of heat exchangers, etc.

What is the volume of your chilled water loop, it should take at least five minutes for the water to get around the loop.
The volume of water divided by the flow rate, should equal more than five....

Hey, chillerwhisperer, I'd sure like to read that article.
Low pressure forever!
Trane, all the way!

The fitting you mention is called "o-ring boss" or ORB. It allows you to thread the fitting in to the position you want, then you tighten the nut down, squeezing an o-ring into a bevelled seat. I...

Today is the first time I've seen this. I have some stuff to pass by you guys, given, the number of machines you must see. I would like to pass on some of my experiences, up here. :D

For me, there's been no school, like the School of Hard Knocks. When I started, I had a couple of great teachers, who were willing to show me the ropes, and I was very eager to learn. But, the most...

Didn't you guys see my pics of an old Tonrac? We changed one out a few years back, the other still sits there. My first chiller call out, R113 chiller at atmospheric pressure, and a huge puddle of...

if you overtorque (100 ft/lbs,criss-cross), it will leak from the stem, once you have, its too late

Had one once, PNL695, would trip overload, almost everyday, would go, reset, start up, test equipment out, nothing. Then, one day, I was there 45 minutes instead of 30, just packed up, walking away,...

Does the fan go the right direction when it starts alone or simultaneously with the other fan? If so, then your condenser is plugged between the layers. You need to remove the top, and split the...

Belzona has metal replacing products and procedures to fix that. Not cheap, lots of prep. Have not tried it, procedures require grit-blasting.

Here's a puller we made last winter, worked great. Just what you need, another piece of steel to carry upstairs, worth it, some of those gummed up ones can be tough.

Is your control transformer fed from phases A and B. This will generate a momentary power loss diagnostic.

have you checked the motor terminal connections, if they're loose or making poor contact, these kind of trips will occur.

What does that mean? Can you fix it? Does the customer plan to do with the chiller? keep it? scrap it? The new Earthwise purge puts recovered refrigerant back into the chiller, pretty cool.

Have you tried cleaning your condensers? Think about it(been through it). If you have a plugged condenser (split condenser), idle fans windmill more quickly as running fans try to do the work.

Have you checked the motor terminal connections? Are the contactors ok? Poor contact in the motor's power supply will cause these shutdowns. Look for discolored copper and/or carbonand clean it up.

Thanks jayguy, you know, as I typed it I knew that was the answer, besides like you say, he can carry up the nitrogen. Thanks, again.

One of our guys recently found a leak; recovered the gas (134a); made repair; had vacuum below 900 microns; then after a vac pump oil change; introduced a couple 3/8 hoses of air(between pump and...

We have a Trane Evacupak, we bought it many years ago. We've rebuilt the pump a couple times, its big and bulky, but with the proper know-how, it works well. What are you guys using?