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DB vertical screw is the only refrigeration compressor that the discharge gas flows over the motor winding. They claim they use Class H insulation on the motor winding.

The CSH series has internal oil filter and the ring gasket on the bottom that threads into the oil manifold housing blows out so the oil never follows it right circuit path.

2000 Sq. Meters you don't estimate, you calculate. Get the architectural drawings and start reading ASHRAE Fundamentals the chapter on cooling load calculations.

EEV needs time to get its act together and be in command. We had this problem w/ Danfoss so changed electrical wiring to delay compressor startup and power up EEV to a preset opening and then start...

How about $15 a piece?

Try bleeding the slide valve block on top of the compressor. There could be liquid refrigerant build up behind the slide valve piston.

I need a tear down manual for Carlyle 5H120 open type recip. I am helping a friend put one back together and need the bolt torque tables, bearing insert clearances, etc..Does anyone have a rebuild...

Hastie001,
You can get even lower than 30%FLA with hotgas but you don't have it. How long does the unit run at min. load before you are shut down due to high discharge superheat? I always see it...

First make sure the slide valve is loading properly and you reach full load. There are two eductors on YS, one pulls from bottom of the evaporator and the other from the evaporator suction baffle...

That is the nature of the beast. At min. slide valve your discharge temp. will shoot up. Do you have hot gas bypass? You can set it to come on when you have 0.5°C differential. All liquid...

Hi Fellas,

I wanted to know what are the symptoms to look for when I have water leak into an evaporator shell on a screw chiller? My guess is that it would start driving the evaporating...

Latitude,

The super heat is discharge and not suction. It is a bad habit of mine from working with too many DX evaporators.

I am going to the jobsite tommorow and get more info. on the year...

Latitude,

The chiller unit has Optiview which makes it probably no more than 3 years old. My entering condenser water temp. is 85degF and the usual 44-54degF on the evaporator. The oil pressure...

I can not figure out what the problem is from the postings. Do you get oil loss when compressor unloads? I have seen it on York YRs and wanted to know if the same happens with Tranes.

Hi Latitude,

I am having similar problem with a York YR chiller. I am losing all the oil in the oil separator as soon as the compressor starts to unload. The oil sloshes around a bit in the oil...

If you are still in school do a summer internship or co-op program with a consulting engineer or manufacturer. You work for free but learn a great deal from the old timers and if you are fast in...

Folks,

I visited a job site with a York YR and everytime it starts to unload I get the oil disappear from the Oil Separator. The unit then trips on Low Oil. Has anyone encountered this problem? ...

Hey Flange,

Are you sure Turbocore makes compressors that large?

Hi Penguin,

I agree with you in that most consulting engineers just go with whoever gives them the best treatment. Actually my boss would fall into that category. We only have Trane catalogs...

Hey Folks,

I am a design engineer working for a consultant in Maryland. We have an application for a 450 TR screw chiller and I wanted to know which of the main three Carrier, Trane, and York is...

I believe that YS is also produced in China.

My friend Joyface,

York has a plant in China. I suggest you find them. They can help you find your manual.

How Come I can never find the thread sent to me?

You have got air being stratified and the cheapest way is to install a ceiling fan with low rpm in the region where you have a high ceiling. The underlying assumption in all load calculations is...

Eversince Copeland was bought by Emerson Electric and split up into territorial entities, with DWM Copeland in Germany being assigned to the middle east market where I used to work, we saw a decline...

Good job. Which city is that in the background?