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Call Darren at Wattmaster (866)918-1100 Ext 236

I have copies of both but it has been so long since I used them that I forgot the passwords and cannot access them.

Hey Calder-You didn't put your email address in your profile.

Aaon has sent a tech out who has been visiting any sites that have 460v combustion fan motors and has been retrofitting 240v motors in their place. I would contact the local Aaon sales rep and ask...

Thanks RunDawg

Can someone please explain this defrost cycle?

gemco,

Do you work for a service company?

Brother I have been there too. I kept my chin up and just tried to always go above and beyond to please my customers-not the owner/manager. It finally paid off and I was given an opportunity to start...

Acid and sludge could affect this by plugging the fan cycle switches but I think something else is going on here. We need superheat/subcooling readings to help you.

Good opportunity. I met some of their people a couple of years ago and liked them.

I am in the Norfolk area. What class are you in? I may be in Petersburg that day which is close to Richmond-not sure yet.

Is there any hot air recirculation happening where discharge air is getting drawn back into the entering side of the coil? Measure the outside air temp away from the equipment and then measure the...

For condenser fan operation, fan cycling will destroy the motor with all the rapid on/off operation. Put an ICM Head Pressure Control on it and set it for sleeve bearing operation.

Thank You all for your input.

I'm at a loss.

The trunk is MSTP and Siemens sees the points sometime and then they don't. At first we replaced the PT Link module and it did not fix it. The wiring contractor had the daisy chain miswired so he...

I'm not a controls guy but I do install these BacNet Modules for Aaon Units. I have a job where we are Bacnet to Siemens and one of the Links is problematic. Siemens says that it is not talking...

KMC=Killing My Compressor

For those of you who were offended, please go away! Far away!

This does not bid well (Pun intended) for the Trane sales engineers. IR-Trane is not getting on board with this technology and they are going to lose a large market share with their outdated Rooftop...

Need more info on the unit.

There is a time delay relay between the first contactor coil and the second coil. Contactor 1 is energized and then 1 second later the second contactor is energized. Motor has two sets of windings (6...

Check for resistance across the circuit breaker and contactor. Check the peckerhead connections also. Don't worry too much about not seeing oil in the sightglass. Once the compressor is running with...

I dig your avatar MilkyWay.

I've done em. Even made a video.

Work overtime on the tough jobs and your boss will see that you are not a 9-5er. When a chiller goes down you have to go right now and in a lot of cases, stay until it gets fixed. Chiller work is...

Aaon does put Schrader cores under their switches. You should be safe.

Does circuit 1 have hot gas reheat? How about circuit 2? Is compressor 1 a modulating type or fixed? If only one circuit has reheat, then only that compressor should be on in dehum mode. The secon...

Sometimes the assembly line forgets to wrap those reheat valves with wet rags and that's why they leak-not because the valves are crap.

Hey Timebuilder you should get one anyway and go after some more Aaon jobs. They will keep you busy I promise.

Put a discharge air reset program on your air handlers and base the reset on return air. I would try 62 degrees DAT based on your lowest return air temperature setpoint like 69 or 70 degrees. This...

I work on em all the time-have my own handheld programming tool which is a necessity. The makeupair units can be pretty complex when you make them a watersource heatpump with heatwheel, modulating...

JayGuy stole my thunder as he is correct. System friction on supply and return affect flow so the open bucket trick proves nothing.

Thanks, I appreciate it.

Does anyone have a copy of Trane's Custom Programming Manual 6.0 Volume 5 or later? I loaned mine to someone a while back and forgot who and I think they conviniently forgot where they got it. Thanks.

Kempdawg,

I started up an AAON RNE120 this summer with 2 of these vfd compressors. I questioned the 380 volt compressors myself. One of the compressors was tripping off on compressor overload (one...

Thanks Rob. This thing was a real booger to disassemble. I will find the local rep and see if I can get parts.

Gentlemen,

I am a commercial hvac tech who was asked to look at a gas fireplace (heatilator) standing pilot will not stay lit. The pilot assembly has 4 components-spark igniter, pilot head,...

This is for tech to tech chat only.

I have not worked with that controller yet. I hear it is pretty simple though.

You need to call Aaon on this and not waste a bunch of time making changes. They need to know all conditions as they exist so they can review the situation. How old is this unit?

15 degrees subcooling on a package unit at design conditions is excessive. You should contact Scott Hamilton or Charlie DeWeese at Aaon for help. I have personally met these guys and they are pretty...

Did you guys forget there is a question being asked here?

This thread has been hijacked. Please start a new thread.

years ago I started up an Intellipak and the salesman had me install some compressor blankets but I don't remember if they were factory or not.

I recommend suction pressure using 3psig increment. Example(R-22) Suction pressure target is 70, suction pressure falls to 67 then unload. Suction pressure increases to 73 then load.

Ditto on the expansion module. I think SCR is the only way to control electric heat in kw range less than 100 though but if you have to stage the heat, use the expansion module instead of the TDR...

You referring to the water heads?

rnp125,

This should be posted under chillers.

I would manually run the drive from dead stop up through the frequency spectrum slowly and look for a vibration at some particular frequency. All drives will have a jump frequency that will allow the...