Type: Posts; User: coolwes
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One of our supervisors got in touch with a local York parts rep and got an answer.
York says "these seals are designed for some oil leakage"
Well H**L, we figured they'd say that.
It has the info you need to make the puller and overhaul the compressor.
Thanks for all the replies. This gives me something to go to the customer with.
I worked on open recips for years and those seals seldom dripped. When they went it was obvious. I thought...
Does anyone have info on the allowable shaft seal leakage (oil) on York open type centrifugal compressors. All I find in the manuals is that some leakage is normal and just discard the oil collected...
I am told service tool doesn't work with any version of Windows beyond Windows 98. I haven't tried it on ME or Xp so I don't know.
You also need the B&B converter to connect to the network.
Condensers are on a closed loop using a plate/frame heat xchngr. Water temp controlled by GBAS (70 - 80 deg.). Fan speed OK.
I actually watched the unit cycle several times on supply air temp and/or...
We don't have air or WS economizers and disabled MWU and NSB. Unit HI never indicates anything preventing compressor operation. Also, as I mentioned, the only way to get it to...
Most situations I have experienced with "too small" involved air leaks throughout the building which never let the compressor catch up. Quite often, where demo/remodeling work is done lines get cut...
I posted this in the Pro Forum also.
I wonder if any of you Trane experts have experienced this.
A multistory office bldg. (partially occupied) with VAVs and PIUs on SCWG intellipak...
Try this site for DowTherm products for chillers etc.
Check with Dwyer.
They have a good variety of flow and pressure controls.
[Edited by coolwes on 10-25-2005 at 09:43 AM]
Seems like I remember doing something like that with a small motor. With no load it slung the rotor apart. I have no idea what the RPM was but it was FAST!
BTUs/Hr = GPM x Delta T x 500
With DC you don't get the AC hummmmm.
Contactors are quieter.
When a large inductive load such as a motor hits the line it drags the voltage down considerably. This causes dimming of lights and a whole multitude of other problems.
Most utilities dictate the...
No, it's not backwards.
Think about it. Dewpoint is when liquid droplets start to form in the refrigerant vapor mixture. Part of the blend has a higher boiling point than the other at a given...
If you are checking superheat use the dewpoint.
If you are checking subcooling use bubblepoint.
OK, here's my story. Reading Shogun's experience reminded me of a simular situation.
A large chilled water air handler with a 4 row coil located in a student center at a local college just didn't...
I remember reading that silica was very hard to remove.
Found this in old RSES SAM manual.
Heavy acid concentrations require (3 gal. liquid scale remover to 10 gal. water).
Also, after initial...
I gave up on the batteries in the Robinair and installed a jack that I could plug a wall wart power supply into.
It served me well. it's somewhere in my basement now.
Thanks again for the...
Excellent information! Thanks.
I guess at some point we are going to have to trust all of this new fangled electronic stuff.
From what you are saying, I think I would go with the Yellow Jacket too....
Flotronic Monitor is available from your Carrier Distributor support guys. It's DOS based software that allows you to look at all of the temps, stages, and EXV positions while chiller is operating....
A compromise was the 3 pipe system where variable temperature hot water and chilled water were both supplied seperately and mixed with a valve at the coil to provide desired air temperature. The...
These are the older model Carrier Flotronic chillers.
30GB, 30GT etc.
the newer models require the use of Network Service Tool or ComfortView software (which gets into your pocketbook).
it really gives you a larger picture of what's going on during operation. Especially TXV position.
You will need the Telebye Model 65 (or equivilent)converter connected to J8 terminals 3 & 6. I...
You should be able to use Windows HyperTerminal.
Be sure caps lock is turned on.
You may have to change baud rate and terminal emulation settings.
Espirit terminals were used with Comfort managers...
I have never worked on them but understand that the railroad used them back in the steam engine years to cool the cars.
The jet pump could produce very low pressures in the range of 6 to 7 mm Hg....
If the new condensing unit has a receiver, forget subcooling. The condenser will not hold any liquid to subcool.
Be sure you are comparing apples to apples.
I had a simular experience once with over the counter contacts.
Found out the contacts were only attached to the bar with rivets.
The OEM specified...
If you are talking about the old panel with the 25 pin RS232 socket, I use a standard RS232(25 pin x 9 pin)modem cable with a null modem adapter. You didn't mention the "caps lock" key. I guess you...
Is the old one trashed??
I have used D series impellers over in some situations where rubbing was minimal. Cleaned up the edges and reshimmed for proper volute clearance.
In your situation this...
Actually, if it's wired in the vane control circuit properly, the system you describe does a good job of reset.
The key is not to bypass any of the 32SM safety functions and use the 32SM as a low...
Not sure what type absorbers you are interested in.
If you go to the York web site you can download some O&M manuals on steam fired and direct fired lithium bromide machines.
They give a pretty...
If you work on low pressure chillers you better know this stuff.
Some manufacturers display pressures below atmospheric as PSIA. So you have to convert.
Sorry to hear about the mishap.
In an effort to get a customer up and running we sometimes bend the rules.
Funny how you get by with it for years and then WHAMMO!
I recall a couple of cases where...
Don't have any teardown info. Carrier was pretty stingy with that back in those years.
I worked on a few and still have recommended clearances.
Haven't seen one in years.
Compressor end journal...
If you do a lot of allignment you may be able to justify an expensive instrument.
But my thoughts pretty much parallel those of chiller mek.
and I know I'm an old timer.
One thing about the Hg manometer and wet bulb indicator is that you are dealing directly with physics.
They seldom lie to you.
I had trouble finding Vac-Qs as well so I built a couple.
Check around on the pressure vessel itself. There should be a plate with the ASME rated MOP. The relief setting should never be higher that this rating.
Hey! thought I had found the White Book on Eagle but they only give you 10 pages of it to whet your appetite.
Hmmmm! But they do give the phone # to order a complete copy. (502-368-6555).
I'm not 100% sure but I think the freeze stat is direct immersion. It has a long element that extends down between the tubes so that it responds better to the evaporator temp.
If the water valves...
We service a lot of malls.
Sometimes the mall management will try to elevate the chilled water temps to save energy. They will run this way until the tenants squawk. If the store doesn't maintain...
I have an old copy, didn't know it was available online.
For years our company had a very extensive training program.
I was the full time training, tech support and safety guy.
Novice techs went through a three year program, two days a month from Oct...
I use a usb to serial adapter but it doesn't work with everything.
If you have Carrier Comfortview installed, it grabs the comm 1 port and makes it unavaible for HVAC Pro.
You can reconfigure the...
I would go with pressure operated VFDs for stable head pressure(I don't like cycling fans unless there is lots of them on the cond.).
Get rid of the receiver and take advantage of the subcooling...
There's a lot of good info here already but this is just a thought.
If each damper bank has is own transducer I would think you could make the positioner span wide enough to give you more span to...
I would keep accurate records on approach. And until I was sure they were doing what they say, pull the heads every year to inspect tube condition.
Seems like I remember .008 to .014 on the kingsbury.
The newer machines may be a little tighter.