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Hey all.

Does anyone know the easiest way to limit an Analog input so it doesn't default to out of range? We have Belimo feedbacks to AI's. When the IP goes above 10v the AI value bounces from 100...

I tried but it appears you've opted to be left alone. lol

I have four circa 2015 Units That all had bad economizer boards. They're obsolete so I upgrade the firmware on the first two in order to see if they would recognize the V4 boards. I finally found a...

Funny you should mention that. I just had the exact same thing happen. Functionally I don’t think it makes a difference but I’ll tell you I’m pretty steaming mad with york units right now.

This is a shot in the dark but I’m wondering if anyone if familiar with Arctic chills carel Bacnet values.

We have a 20 ton chiller that’s a heat pump. We give it an enable, heating or cooling,...

these things were put in 2007. Im not saying they've run "fine" because there was a lot of tweaking that has to happen on the AHU end (freeze stats tripping due to unit shutting down on schedule and...

I’ve found myself scratching my head over this daikin controller.

Two split condensing units circa 2007. Two stage tandem jobbies.

Dimfor an enable, stage one and stage two. For whatever reason...

Plc Power or device Power?

Pretty sure they’re assembled with inert gas which is why the joints look so clean (Trane split units were on how it’s made)

Ive always wondered if they use something different like stay brite. I...

Mini splits or split air handling equipment?

Mini splits are a doozer because they’re thermistor driven. I overcharged one a while ago that I’d repaired a leak in. A frosty line doesn’t always...

They’re fairl popular around here because the Lennox ones offer a 10 year part 12 year compressor warranty and the pricing can’t be beat. Fellow I know had one with a dead indoor display out of the...

I worked representing conpanies that built custom air handlers. The ac sections were built by miscellaneous companies.

8 stages of cooling. 600v3ph. 12 gauge wire and full tilt those scrolls...

Silly question but I know On the mcquays if you rearrange the capacitor leads it reverses the rotation. Still don’t quite understand how that works. Sometimes I just accept the magic.

Errr. Rating plates?

Did a job a couple of weeks ago. Peeled off the cover and found this. They grabbed three from the mains on the bottom of the panel. I was not happy.

York thermistors for the last while have been utter garbage. I wasn’t too happy when I had to patch crushed and split condenser tubes on an rtu that had already had the coil sensors replaced. Unit...

https://s3.amazonaws.com/s3.supplyhouse.com/product_files/Maxitrol-A1010U-Product-Overview.pdf

See if it has the optional stat in the space. Disconnect it, play around. Not sure if that model but...

Yeah. I’ll have to dig out the ion again and check it out. Either end switch triggers loop circ and boiler simultaneously. Heating loop only gets used a handful of times every year.

I’ve got an interestingly chopped up house. It had hot water baseboard split between two zones. I initially installed a dual fuji that did main floor and downstairs and then soon after put a trizone...

Don’t do it. The only thing you put on live conductors are multimeter leads in good condition. Not worth it. We have 575/600 up here. I’ve been bit a couple of times very gently. Tightening while...

Found a cracked tube in a condenser end plate. Came kind of bend downward from factory on Mitsubishi city multi.

When they work, they’re awesome but like most technology it’s not going to dumb...

I was at a place today where they need to estimate their total wastewater. This particular building has potable water as well as a rain water collection for non potable. We're tied into the...

Did you install any power exhausters with your mini grinder?

Grrr...trane

Over the years I've blazed many a joints in the ceiling. Cya and make sure if there's any hot work procedures required by local/state code?

I've always wrapped heads with wet rags however one guy...

I made this mistake years ago. My boss likes to pull the shraeder depressors out of hoses for better Evans and not put them back in. I couldn't believe how fast it pulled a great vacuum. I opened the...

https://www.trane.com/residential/en/products/heating-and-cooling/ductless-systems/mini-split-outdoor-unit/4txk38.html

38 seer?
15 HSPF? I thought Fujitsu with 30 was impressive now this?

It's like a car mfg boasting 70 mpg... what gives?

I'd like to see one of these in person.

What happened?

So I saw a wee fellow (maybe it was a precedent) with the reversing valve and check for dehum but I just pulled a stat to a 50 ton voyager with dehumidification. The tandem compressors bullhead on...

how would the existing cap tube act with 410?

LOL

BUT sir! 410A runs at higher pressures than R-22!
/end sarcasm

I'm following this for interest. Would it draw less current? Higher comp ratio? I'm thinking a read along the lines of a...

They just grab 208 from L1-L2 off of the unit

I was driving a work term kid home who had showed up smelling like booze. Decided to whip into the mall and use my phone gift card. Had never really paid attention to the max clearance signs until I...

I almost made the fatal mistake of thinking a compressor was grounded when it still had a leg of power going to it (will screw with meter and show continuity to ground).

The windings and...

What the fleck are you using as your test medium? If your nitrogen is that wet I would be upset.

How are you guys getting three phase power in your houses?

I did work at a shell station and they called me to tell me the compressor made a horrible noise. I came in and it was humming away fine and I just assumed they were nuts. They called me back and...

I've had both happen. Both times were in the summer. Typically you'll know the thing failed if the liquid line is screaming hot and it's going off on high head. One time clipping it bought me some...

I'm personally against dye because it is forever. Every times someone puts their gauge on for the rest of eternity it looks like a multiple homicide every time you check with the light

A good cleaning, Silver solder flux and silphos does the trick no troubles

That teflon sure is purdy white. Black iron drain! Yikes

With no smaller than a 24" pipe wrench

Mighty puffy. Just kneed it and apply

Where I come from you're not legally aloud to put refrigerant into something if you know it has had a leak. Refrigerant losses ofntjst size need to be reported.

It would be far too easy for a manufacturer to fit is on in the first place... I like when they put sealed bearings inside of a sleeve with a grease nipple and techs don't know the difference so they...

Love the 1587. I just wish it could do microamps. That and if it had the clamp attachment you could use it for anything. Very sound meter. Ac/dc milliamperes. Very precise.

Bitzer

Loved the idea until I saw the price. Ouch!

I've seen the same thing in GP combustion burner systems. Linkage system that drives the butterfly and blower damper however to high/low fire for proving purge and low fire ignition. I don't know how...

Little curious. I've got a combination that does my domestic and hw baseboard although it has od temp reset. Works like a dream