Question about Delfield (F18WC60) Commercial Refrigerator

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Delfield bay marie M/N 18693pt S/N 65629M

Just changed a bad compressor in this unit it was originally an R-12 unit i replaced it with R-409A and the unit will not get down to temp and the compressor is kicking out on high heat i did clean the condenser coils any ideas?

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Very most likely overcharged on freon. With R-409-A, you can not charge by sight glass. Do the ambient plus 30 method if it is a txv. That will get you close. If it is a cap tube, charge to an evap temp of about 20 degrees. then watch it. Make sure it makes temp and shuts off.
Hope this helps

Posted on May 02, 2010


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I have a manitowoc ice machine that was on r12 at 22oz. changed to 134a can you tell me what pressure and how many oz.

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Delfield 'New 6000XL 6051 Side by Side Refrigerator

How was this unit originally equipped? TXV? Use only a TXV OF CORRECT size. In refrigeration if you have a 6000btu rating you do not use a 1/2 ton valve you use a 1/4 ton (3000btuh) at most and would need consulting with an engineer to arrive at the correct valve.

SO was the TXV the other fellow replaced an OEM valve? If not this may be the problem as most TXV's off the shelf are designed for walk-in refrigeration Not Reach ins. An OEM valve may be the trouble here.

Now not to stress the TXV but also the compressor (what was the original model?) Make sure it is designed for the particular heat range and size for this application. As you probably know 1 size compressor designs for AC will not be OK on Refrigeration at same BTU rating.

Call Del field and verify what they are using or recommending for this unit. model and Seal no required and the existing model and SN.

Also to my knowledge a receiver is not required and in fact will only add to your trouble. Receivers are for changes (wide differences) in condensing temperature and pressure. Never saw an application for one with a condenser designed from factory for indoor use with either type of expansion device.

If you need Del fileds number email me at and in th subject line enter delfield?.

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1 Answer

Clean the condensor

You can clean the condenser while it is running or you can unplug unit . most of the time you can use a nylon brush to brush off the condenser. If it has not been cleaned in a while you may need some sort of compressed air to blow through it. If units are in restaurant and by fryers or have greasy buildup on them you will need to unplug unit and spray some degreaser on it then rinse with water. It is important to clean the condenser, the part with fins and is located by compressor, because a dirty condenser will shorten the life of the compressor.

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