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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  • Delfield Master
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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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Can a delfield model 407 using r12 freon be modified with a new compressor to use current refrigerants


yes it can. if the model is a techumseh find the local dealer.
give them the compressor model # and get the new 134a model
equivelant. no oil change . replace the filter drier when you replace it .the refrigerant charge will be about 90% of the original r-12 charge

Nov 08, 2012 | Delfield Freezers

1 Answer

The evaporator coil now it frozen , so can you show me how to deprost the ice Thanks


This unit should have a defrost timer on near the compressor. You can turn the dial so it is the area set for defrost time. Usually times are set for 6 am, 12 pm, 6 pm 12 am for around 30 minutes. Adjust the timer dial to where the screw is. Or you can just unplug it.

Aug 14, 2011 | Delfield 113.28 cu. ft. Commercial Freezer...

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Replaced starting components (relay was burned out). Compressor starts and runs ok but only for about 15 seconds then cycles off by the t-stat. Starts again in about 45 seconds and shuts down again. ...


Ok so in this case the most likely reason the relay burnt out is because the compressor is tight and having problems starting so it burnt relay. Need to determine what LRA (locked rotor amps) is by looking on data plate on compressor and see if amp draw is at or very near the LRA spec. if it is the compressor is bad

Aug 12, 2011 | Delfield Refrigerators

1 Answer

Is it possible for a delfield freezer 6151 XL-S to trip a breaker every 2-3 hours if the TXV valve was faulty letting liquid get to compressor. This unit has had controller and relay start assembly...


I would look to see if it is tripping during the defrost cycle. One of the heater elements my be faulty. Never heard of a bad TXV causing a breaker tripping, but I guess it's possible. I would adjust the superheat so that it is about 6 to 8 degrees just prior to unit reaching temp and shutting off. I'd start there.

Apr 01, 2011 | Delfield Freezer 6151XLSR Stainless steel

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My Delfield Freezer (f2fh) does not keep cold. I've cleaned the coil and completely defrosted the freezer, but it won't maintain freezing temps. It drops to about 12 deg then will go to between 45-60, then...


Possible solution to original question at top of page: Recently worked on a Delfield F2FH with the exact same problem. Would get to 12 degrees and then go up and down either to -10 degrees or up to 12 to 55 degrees. Although I cleaned the condenser coil of some dust it was not the problem. There was no icing of the evaporator either. The defrost timer was also working. There was icing of the lines coming off the compressor but this was simply a symptom of the real problem. After checking everything out carefully and talking more with the customer about how the unit was fluctuating in temperture I noticed something that I had not paid much attention to as a possible factor in the problem. It seems a previous technician had worked on the unit and was very sloppy in his work as he did not put many of the screws back in place after taking the unit apart. Two screws that he did not put back were the ones that secure the overhead outside front panel where the door switches are located. As a result the switches were only making a hap hazard connection with the striker pads on the top of the doors. Whenever the owner moved the unit or, wiped the panel or, even opened the door the top service panel would move slightly out of allignment causing one or both door switches not to contact the striker plates. This in turn shut down the evaporator fans inside the freezer compartment which then only allowed cold air to drift to the bottom of the inside of the unit. The temp control sensor, mounted inside at the top near the evaporator fans, was reading tempertures inside the freezer compartment warmer at the top as all the colder air was at the bottom. On this unit there was only about a half inch of tolerance on the door striker plates so if they were not alligned properly the fans did not come on. So, check your door switches and see if they are engaging. One or both of your doors may have dropped to low to fully engage your door switches due to worn bushing or hinges (each door will only turn half the fans on inside); your striker plates may be worn cracked or out of allignment; your top panel is loose and moving the strikers out of allignment. Don't forget to manually test the evaportor fans to see if they are all working. Do this by opening both doors and pressing both door switches. If the fans do not come on suspect a bad switch which controls the fans which failed. If all the fans come on the problem is in the contact of door to striker plate. If one or even two fans do not come on test the fan itself. The air must circulate insde to keep a proper temperture. I hope this was helpful.

hweyer@bellsouth.net Appliance Technician

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1 Answer

I have an old TRUE refrigerator (S/N 1-160481). How can I find the Model number and replacement compressor part number? Breaker trips immediately when turned on. Reaonably sure the compressor is...


GDM-41 would be the unit model number???
If you want to get a compressor model number that would be on the compressor tag on the compressor itself. I would not bother with a True part number just get the Copeland or Tecumseh number off of the compressor and get a replacement from a local wholesaler. On this old box do not rule out brittle or shorted wires. I haven't had success with converting a box like this to R-134a unless I change the entire condensing unit and would tend to go with an interim replacement like Hot Shot or R-409A or something like that. The box probably won't last long enough to make R-134a conversion viable.

Aug 11, 2010 | True GDM-41 Refrigerator

1 Answer

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.


I wouldn't recommend R-134A for an existing unit conversion. The head pressure will probably be a bit high and a complete oil change will be necessary. I don't know what model you have or what the nickel plating on the plate looks like now but an R-12 machine will be pretty old. If you must convert I would use one of the interim replacements for R-12 such as R-414B also known as Hotshot, possibly R-409A, or Frig-12 that was made as a interim for the automotive a/c applications. Not knowing your availability to these various refrigerants I might also recommend checking the automotive a/c replacements to see what is available. As for amounts with such a small system and a TXV metering device I would just add 22oz as long as the head pressure doesn't get over say 175psi during freeze mode.

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2 Answers

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 farfield@hughes.net and in th subject line enter delfield?.

Feb 14, 2009 | Delfield 'New 6000XL 6051 Side by Side...

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.

Dec 19, 2008 | Delfield 'New 6000XL 6051 Side by Side...

1 Answer

Freezer not defrosting between cycles


Check the defrost timer for operation if your unit has one. Some Delfield models have solid state controls. If your system has a timer for the defrost you can open the timer cover and turn the dial in the direction indicated by the arrow until a time peg comes up to the time of day marker. You will hear a loud click and the compressor will shut off. Defrost should take place. The inner dial of the timer will have some indication as to how long in minutes the defrost should take. If the pointer does not move while in the defrost position the timer motor is bad. Turn the dial again so the copper pointer goes past the time of day marker and the compressor should restart. Replace the timer.

Jul 04, 2008 | Delfield 113.28 cu. ft. Commercial Freezer...

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