York RTU Multiple Problems

I am commissioning a few units at this building. I notice that one of the RTU’s has black dust from the belt all over motor and inside blower motor compartment. Therefore I make adjustments and tighten the belt. Once the unit starts the compressor sounds broken. I start the second compressor and same thing. I correct the phasing of the compressors and they start pumping correctly.

[@marcoferreira226]

I'm six month in, I see and learn a lot from you and your service work. I love how you think out loud. I have been on construction learning placement and layouts but no service. keep doing what you do

[@thehvachacker]

HVAC is a very complex field and we all are learning everyday. Good luck on your journey

[@ryanseamons7588]

For the YORK units hold down the cancel button for 6 seconds and then it will say “cancel timer” then hit enter. This works for all timers except the start up timer.

[@thehvachacker]

That makes sense in why sometimes I was able to override the timer and other times the board ignored me. Thanks for the info I don't work on a lot of new York RTU’s

[@SombraLocs]

How do you reset alarms on that controller? Do you know this controller?

[@TheHolyFlapjack]

Now that I’m going through HVACR trade school, I understand what you’re doing even more and it’s even more interesting to watch because one day I will be doing the same thing

[@thehvachacker]

I wish I had videos to watch when in trade school or first learning. Instead only had website forums

[@samx9024]

Sounds like the compressor phasing is wrong. Lucky you. Love the commentary..I will continue watching. Great content. Thank you.

[@thehvachacker]

I am just having fun working. I’m just honest. Too many are looking for perfection in the videos they watch.

[@joserolando9502]

You are right that happens to me I just switched the phase and that noise goes away

[@quetzelcotle3816]

@@thehvachackerexactly my thoughts. What changed since the last time it was working.

[@JDT738126]

Love these unedited videos, its real world hvac work

[@Ted_E_Bear]

The Great Hacker rides off into another beautiful sunset knowing he solved another problem! Let’s give The Hacker the accolades he deserves !!!

[@thehvachacker]

Thanks that was a nice sunset taking place behind me

[@jonnymac31]

Haha man you were pumped when that compressor first started.

[@thehvachacker]

Yup I sure was

[@jphvac5725]

Love carrier schematics. Trane makes them waay too complicated to point where u have to look up each terminal to see what it is instead of it being labeled normally. Just my opinion. Great video!

[@lawnmoose]

I recently got a no heat on a Carrier. The blower belt was cracked to shit. Installed was a 36". I went to the supplier, and they said either std is 33 and high-static is 39. I took the 33 and adjusted the motor. My amp readings were 2.1 amp running, rated 2.2. Good to go!

[@thehvachacker]

Good amps and static sounds like a successful job

[@veil67]

that was Egon who was always said never cross the beams 😉

[@thehvachacker]

It was a great movie 👍

[@RJMaker]

It's good you worked it out... (VFD's are generally phase independent.). That said, running scrolls backwards long enough will cause damage. I would have gauged up. At the very least grabbed some current measurements.

[@thehvachacker]

I still had to go back to this unit to start up and commission it. Which is why I didn’t check pressures or amps at this time. The compressors seemed to be working correctly and pressures somewhat near specks for a 50 degree day with low load on the RTU. This system was installed over a month ago. Unless an electrician just swapped the breaker sometime before I went to commission a few of the new units their.

[@ryanseamons7588]

Pull the grey terminals off the board for the thermostat inputs and just use jumpers from R to occ and to your Y or W terminals. This is how you can jump these units easily.

[@SombraLocs]

I got a question. What is HS1 Shutdown Due To Limit Switch ?

[@stueygreenberg8989]

I would be changing that disconnect box. Accident waiting to happen there. Haha to your Home Depot comment! I service Home Depots, so I just go down the ladder and get what i need. lol

[@thehvachacker]

This is a direct install through the state. If we land the contract for maintenance that will be recommended. Yet only thing that gets changed is the unit everything else is reused

[@donnierobertson3088]

Nice job

[@thehvachacker]

Thanks Donnie

[@IFIXCASTLES]

From my experience the compressors are phased with the indoor blower motor from the manufacturer. If compressors run backwards so will the blower motor.

[@thehvachacker]

Yes, except on a VFD blower, which I learned from this job. We all learn new stuff everyday

[@watermanone7567]

Could you have changed two of the incoming lines so that the wiring schematic will still read correctly. Thanks for the video's. Many people would not have realized that those compressors are phase sensitive.

[@thehvachacker]

I could have yet the only changes on the schematic is just one of the compressor’s leg of power. So the schematic remains the same. Yet it would be less work swapping an incoming wire

[@swill1530]

yeah common problem for the last 15 or so some tech have even mistakenly change the compressor

[@johnt7502]

If you suspect reversed phasing, switch two wires at the bottom of the disconnect. You should remark the wires with the correct color marking tape.

[@thehvachacker]

It would have been quicker to switch at the disconnect. Yet only the compressors seemed to be affected by the reversed phasing.

[@johnt7502]

The VFD converts the incoming power, three phase or single phase ac, into dc. Then creates Square wave three phase. Forward and reverse are program functions made during drive setup. The blower will run the right way no matter how the phases are connected. FYI.

[@thehvachacker]

I learned from this job to make my next job easier

[@johnt7502]

The days of us just looking at the blower during startup are over. Nearly every unit above 5 tons either now has or will have a Drive. Are you listening manufacturers? Start including phase monitors. 👍

[@jim8230]

Who cares what the "haters" have to say? They can go elsewhere for content. Just do your thing...we're watching.

[@thehvachacker]

Easier said than done at times.

[@jimisbell832]

Save yourself some time, the next time you run into this...reverse two leads on the load side of your disconnect...the VFD feeding the fan motor is designed to prevent the fan motor from running backwards...so your phasing is reversed at the disconnect.

[@thehvachacker]

We all learn new stuff everyday working in this field. Never had an out of phase unit with a VFD. Usually the blower rotation is backwards without the VFD. Thanks for the advise, next time I will just swap the incoming leads

[@jeffgrant6914]

Nice video

[@thehvachacker]

Thanks Jeff, it was an interesting experience

[@ping_me1vp]

Dis you even check if blower is spinning the correct way, in supposing that blower is 3ph as well, reverse 2 wires on comp. Contactor. + power surges can reverse phases, pretty common issues in NY tristate area that's why phase controls get installed

[@thehvachacker]

Blower is spinning correct way. That was what threw me off at first. Out of phase will make the blower spin backwards.

[@brainndamage]

VFDs don't care about input phase. The utility could be hooked up phase reversed.

[@thehvachacker]

Good to know we are all learning new stuff everyday

[@nsaglian]

That unit looks very new; was it commissioned out of phase?

[@thehvachacker]

I am doing the commissioning. We mostly install Lennox systems. I should of taken the book out of one of the York’s so I can learn how to navigate the controller

[@kenton6098]

Is there an amount of belt deflection specified by the manufacturer for proper tension?

[@allisonm4086]

Yes there is. They have a tension gauge at all blower motor stations.

[@chriswhite7193]

There really isn’t a first stage compressor on these units, the system switches which compressor is “first stage” based on system use, to even out compressor wear. That’s from York directly.

[@kcomfortsystemshvac7060]

Good video,,,amigo Soprano,,,,what is whater like ,,,cold ?

[@thehvachacker]

Yes it is cold. Yet this day started at 30 degrees yet went up to 60.

[@mark.r8900]

Hi, I have a york rtu. It's only 6 months old. It has a vfd control and a SE control board. On a heat call the display on the vfd says F25.3. The unit shuts down due to limit switch. The supply temp is about 190F. Gas pressure, belt, filters, ducts all good. How can I adjust fan speed? Also can you get rid of the vfd and use motor normally? Thanks

[@workingshlub8861]

got a york rtu unit that says indoor air quality sensor failure and the contactor for the condenser and compressor wont pull in just the fan one does....push it in manually and everything kicks on....any thoughts?? i have 24v at the transformer..

[@More350Power]

At first that compressor sounded like an old recip with a broken rod..... Though not used much, I inherited a phase rotation meter from my father when he used to do commercial work. Three phase always fascinated me. Oddly, I was able to get a 1.5 hp 3 phase motor to run off of 220 single phase correctly with nothing more than a capacitor to create a phantom leg Just for fun. You are not all that far from where I am, did you get dumped on by the weather?

[@thehvachacker]

Yes, I did get dumped on by the weather. Very dumped on by rain on thanksgiving as in this video kzbin.info/www/bejne/mZuxooqJdpt3g8k. Plus the cold weather stirred up a lot of no heat calls. I need to find a phase rotation meter, it would have been handy on this job

[@RJMaker]

Ridiculous, New RTU and the cheap installers couldn't be bothered to replace a $100 disconnect.

[@thehvachacker]

It’s a direct install through the state. Therefore only the curb and unit gets replaced. What makes these jobs tough is unit BTU’s are not allowed to increase or decrease on these jobs. Just straight direct replacement to newer higher efficient system. Many building owners expect existing airflow problems they had with existing equipment, will disappear with their new unit. Yet don’t want to pay to fix the ductwork.

[@alvindriffield3462]

yeah that rebar is bend af lol

[@chriswhite7193]

They over automated these units, they are great units, but there is so many issues with sensor failures, and limits being placed too close to heat exchanger, and heat strips, that even new these units generate a LOT of bs calls. Plus all the phantom errors.

[@yongsinkang5112]

where is the best place to buy new belts for York RTU?

[@steveblake8766]

#44 Thumbs Up

[@pauldusa]

New Crap,, why didn't you just switch the 24 volt to the contactor, haha, you did what I suggested. and leave off the wire on the bad one.... true... we only learn.. when things go wrong

[@JuanTodoli]

Maybe an electrician switched phases when replacing a breaker downstairs?

[@thehvachacker]

It’s possible this was installed 2 months ago and they never called in for it not working

[@HighestRank]

Dr Egon Spengler, Played by: Harold Ramis

[@chriswhite7193]

They tried to cram in so much extra technology in these they create more problems then they save or detect.