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The responses to this have been very interesting. If the service tech had drawn a PROPER evacuation on the isolated compressor this would have removed any refrigerant that could of been in the...

Dupont developed these refrigerants in the early 90'S.

MP39 & MP66
MP = medium pressure
39 is the last two digits of the assigned research number...

Yes it is true ... Andy will becoming a compressor expert out of Ann Arbor MI.

To all my friends at this wonderful commerical information network. I just thought that this being your Thanksgiving week that you may wish to see how Canadian see Mount Rushmore. Have a great and...

Carrier 19DR is a dual compressor unshell chiller with either two 19DK or 19DM compressors on the unit. You must first find out which comressor is on this unit. To find this out read, the compressor...

IRD had a great vibration training program several years ago, I am not sure if they still offer this training. Their training program was the industry standard several years ago, today I'm not...

If the chiller has been selected based on ARI 550 standard the following would be correct. The flow rate through the cooler should be 2.4 gpm (US) per ton and the condenser flow rate should be 3.0...

Ther are three versions of 19XR centrifugal chillers. The original 19XL units with slight modifications and PIC I controls, then 19XR R-134a chiller with PIC control II, currently there are two...

Carrier produced a significant number of 48DA and 50DA series roof top unit of the 006 capacity (5 ton) were R-500 units. You may wish to double check the units nameplate. If someone put R-22 into a...

R-402A and R-402B contain the same components but in reversed percentages. R-125, R-290 and R-22. R-402A component percentages are 60-02-38 while R-402B is 38-02-60. R-402A will work in your ice...

The north American manufacturers of both centrifugal and screw compressor chillers produce chillers that conform to ARI Standard 550. The selection of the chiller may vary from the standards but this...

It took me a little time to find the attached drawing but I believe that it will answer your question regarding the clearances of a R-22 float assembly. Please keep in mind that a ton is a ton is a...

With the literature that was previously mentioned keep in mind that the clearances stated in SM-022 are for R-12 machines not R-22 machines. The clearances that you need are published in 19XL-1SS...

I forgot to mention that this seminar will be of Saturday April 18, 2009 from 8:00 AM to 4:30 PM. Sorry about forgetting to mention this important information, lets just put it down as :mad:old age.

A couple of weeks ago I made a request if anyone had heard of this upcoming seminar. I have aquired the detail and thought that they should be passed on if others would like to attend this program....

There in a new piece of service literature that has been produced by Honeywell that is a complete "In-The-Field Tool" for servicing their economizer controls. This piece of literature is titled...

Has anyone heard that there will be a centrifugal / screw chiller training program being presented in the greater Philly area on Saturday April 18th? If anyone could shed some light on this program...

It sounds like that who ever serviced the machine before did not have R404A so they put R-507 into the system. One thing that you may wish to consider would be to see what refrigerant the TEV are...

I have not responded to my original post as travel has keep me extremely busy lately. I have read the various responses with great interest and it is apparent that there is an abundance of knowledge...

The following quote is taken from a piece of TRANE literature (CDHF-SVU01C-EN) ON PAGE 41.

"When one compressor is operational the approach value will be similar to those found on single...

That is one reason why you need motor terminal insulation and if your condensing liquid temperature is too cold ( too much sub cooling) the rear motor cooling nozzle will keep the terminal too cold...

After checking my notes to confirm a few older details please consider the following:

1994 23XL are an R-22 unit .. manufactured by Ingersol Rand.
See literature 23XL 1SS for overhaul details.
...

I reas this post with great interest as the early Carrier 23XL screw compressors were manufactured by Ingersol Rand. This unit is field rebuildable, Carrier produced a video and text showing the...

The piece of literature that you need is available from any Carrier Sales office. Ask for 19XRV-2SS, this literature covers all 19XR compressors. The clearances, fits and torque values are all listed...

If the system containes a single component refrigerant like R-22 or R-134a the coldest spot is just as the last drop of refrigerant changes state in the evaporator from a liwuid to a vapor. If the...