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Open drive york, sat idle for to long??, we have strapped heaters to motor belly, no motor likes moisture at windings??

Efficient why, you just rebuild and chiller not tight???

York purges don't suck, york use gaskets not o'rings or flat face like trane's new gear.

If your purge is doing work you have a leak.
I

No, you could run it at minimum load and allow purge to take care of it, would need to be watched carefully though, negative pressure can be a real pain, if every manufacturer of negative pressure...

I agree 255 rthb exv could be on the cusp of a bigger capacity machine, limit the exv steps, bank up in condenser give it some liquid to boil off and raise low side pressure, were you seeing low...

Carrier or york never had this problem with there chillers, maybe Trane go to single stage , then casing movement horizontally and vertically at elbow lockdown wouldn't be a problem.

Can anyone...

Are they using goretex tape on elbow to compressor these days??

Never seize, not a problem , I have heard of trane factory techs saying a wire wheel is TOO abrasive at flange faces ??. Regarding reassembly torque and sequence, is that really a problem?? would...

I believe email/ westinghouse could have developed the movable diffuser, not that easy to set though back in the day, also think a lot of the problems could have been due to the float system, have...

Refrigerant was previously removed, waterside drained (we are not looking at tube failure), there will be no issues with igv or comp bearings, nitrogen was purged and heat lamps utilised at vessels,...

Economiser, suction elbow etc, just pay a proper insulation tradesperson to carryout work, vapour seal no air, no corrosion.

So york developed the movable diffuser?, one reliant on oil pressure or electronics?, just curious, who knows what banner they are flying under now, got a few pe (westinghouse), 1972 design still...

95% of times the chiller is blamed.

Try checking for field related problems, (UNLESS york /jc r&d is not up to scratch)

Working on york R123 chiller at moment, this machine open for sometime ( due to customer not approving works) , just briefly I usually install driers across cooler/evap, utilising high side pressure...

Chances are if you have a leak, those needle bearings are already close to binding.

On our leakers, we always give client the option to changeout bearings on first stage, funnily enough not to...

My experience,


My experience,

Run into one of these Trane gurus??, 15 years working as a mechanic.

Installed an after market soft start upside down, (cheaper for the company he was...

No one has had issues with IGBT, soft start or PWM modules???

A few split pins, dowelling, one seal tight, the rest so wide ???.

Why don't we make some easy money, and get the chw plant doing what it should be.

Any monkey can rebuild a chiller , takes a...

Thanks for response.

Thought parts would be a problem, especially vintage chiller I'm looking at.

Whats your opinion on Turbocor compressor chillers???

Fellow workers,

Anyone currently overhauling this brand and age of chiller, from what I know McQuay/ Daikin have basically re-badged them.

I have rebuild service instruction on PE compressors...

GEEZZ boys was just having a bit of a joke, was fully aware trane make gear driven, have worked on a few, however I always like to throw the trane vs york thing in.:cheers:

Gents,

Why is the rebuild so easy on a trane chiller compared to a york , have trane done a geared drive in recent years , yes. many years ago, 20 thou ho ho

A nuisance when it came to logging

Of track what about rthb on R22

Cant read

Give him a service bulletin or rebuild bulletin thats all he wants

Lets face it temp sensors are cheaper than tranducers. However transducers are still utilised for more important safeties on some machines.

Have heard of control software problems on UCP2 ...

What exactly

If you dont have an independant purge , id be pressurising and leak test. Especially if you suspect significant leaks. Do oil analysis to.

Yorkies, have fun with the discharge flange to condenser...

Been chasing a good one for a while now, do they have non return valve if power fails etc , pass on details if you guys recommend them , I have always been a fan of the belt driven ones though,...

RTAA I assume you have more than one compressor on this chiller, do nothing , let it run , if it blows then you know it was a screwy sound.

Touchy subject??? Some do mechanical some do software /controls , however im always the one do mechanical at 2 am in the morning.

Would I be correct in assuming tolerances are to tight to do repairs in the field and the only option is send back to manufacturer

Have had a few motors go on cvhe's haven't worked on to many cvhf's.

We get motors overhauled by shop that predominately does heavy equip, mining and process plant.

Havent had any dramas.
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I agree 100% . I wasn't commenting on exv upgrade being a solution to head pressure problems etc. Just trying to inform that there are upgrades available. However is soft loading the only option .

Interesting, what seal pressure do york recommend when you buy this valve. You got any info on these

Majority of calls to these chillers I have found are due to oil problems but are not oil related as such , head pressure control to these chillers is essential, if you have failed fans etc you will...

I agree with 123 statement

Install washers to increase flow

2-3 works

I got it , whats the go though, you seem to ask for a lot of service bulletins , manuals etc reading won,t teach you everything

Wouldn't be to concerned about diffuser plate, rebuild both igv assemblies, have had refrigerant meet its critical point in the past, freon fire, who knows though???

You would have heard a rattle/ hum at the 2nd stage end if the igvs are lazy when chiller was running. Sounds like oil pressure loss or bearing failure at drive end and and she smashed up. How were...

Let me help you. MORE INFO

You don't control chiller plant call or stage up do you . See if chw pumps are running on or starting when they shouldnt be. Oil sump on rthd sits above cooler vessel.????

Right on

Missing screw from igv asembly????

Plenty of info for you, what machine in specific screw, turbocor.

Two chillers lead/lag I would assume. EXV position should tell the story. Pretty sure these chillers rely on adequate pressure differential to load.

Starve the cooler , ratio increases, suction sheat increases as does discharge superheat. If u have a chiller controlled by condenser level (hi side float) that float will look after only one...