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What should be my pressure on a 404a freezer - Continental Manufacturing Company Commercial Freezer Value Line 1FX-LT-GD-HD Stainless Steel

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  • Continental Master
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Usually depends on the temp of the conditioned space. Most freezers run about a minus 10 evap to get a 0 degree box. So look for a low side pressure of about 25. High side is ambient plus 30. A 75 degree ambient, for example, add 30 and get 105 degrees. That, on a P/T chart converts to about 253 psi. Those are approximate but I'm sure you can use this to fugure out what to look for.
let me know if you need more help.

Posted on Oct 06, 2010

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Posted on Jan 02, 2017

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SOURCE: Delfield 6000xl: what is the 404a freon charge?

http://www.delfield.com/?xhtml=xhtml/del/us/en/general/partsandservice/archivemanuals.html&xsl=minisite.xsl
this is for their web site. It has all the manuals and charging tables. There is no 6000xl. Need exact model number as the amount varies.
Hope this helps

Posted on Apr 01, 2010

  • 1238 Answers

SOURCE: Delfield 6000xl: what is the 404a freon charge?

http://www.delfield.com/docs/uploaded/del/Serviceinfo/ref_serv.pdf
this web site has a table of units and their respective charging amounts.
Hope this does it for you.

Posted on May 11, 2010

Sea Breeze
  • 4655 Answers

SOURCE: normal operating pressures

Normal operating pressures will change as the freezer reaches the selected temperatures on the inside. Normals of minus 14 degrees on the inside would be around minus 4 psi on the suction and 150 pis on discharge. Now checking the pressure will require a set of guages that have been purged with the same freon before connecting with the suction line on freezer. If not purged the suction line will draw outside air into the system and cause freezing of air and moisture inside the capillary tube rendering the freezer inoperative, Hope this helps, Sea Breeze

Posted on Nov 02, 2007

bobicehouse
  • 1524 Answers

SOURCE: suction pressure on minus 40

http://www.refrigerants.com/pics/ptchart.pdf

Posted on Dec 26, 2010

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1 Answer

What should the refrigerant pressures be on a reach in freezer that uses 404A refrigerant


Generally, low side is around 20-25 PSI and High side is about 235-250 when unit is close to operating temp. Expansion device effects this to some degree such as a cap tube can restrict and affect pressures as well as the amount of the charge in the system. Compressor efficiency is another.

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What is the suction pressure low side and high side charging 404a refigerant cooling temperature


evap temps usuall run 10-15 degrees below the box temp.This a generally accepted rule of thumb.

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What should be my pressure on a Delfield 404A refrigerator


As a general rule of thumb, pressure on low side should equal a temperature of about 17-18 degrees if the box is not hot and a high side of ambient plus 30. Again, this is a general rule of thumb that usually gets you close enough to get a unit working providing all other things are right.

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Suction pressure on minus 40 chest freezer using 404a refrigerant


http://www.refrigerants.com/pics/ptchart.pdf

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http://www.delfield.com/docs/uploaded/del/Serviceinfo/ref_serv.pdf
this web site has a table of units and their respective charging amounts.
Hope this does it for you.

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1 Answer

I have a ice maker that keep freezing up. the pressures are 50/280 its a 404a system. what are the normal pressures


For a 404 system pressures should be about 60/350 Remember when you recharged always with the freon drum upsidedown so liquid gas is going in to the system.But if it's freezing up could be the thermostat or the timer or the heaters.

Aug 13, 2009 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Evaporator unit keeps on building ice. question what is the nornal operating pressure on low side and on the high side for truee freezer using 404 refrigerant


I'll try to give you the "Readers Digest" version.
First, make sure there is no ice build up on the evap. Light frost is O.K. as long as it does not effect air flow. (Very Important). All fans need to be running. Again, an air flow thing. There should be some product in the box but not too close to the evap. Again, an air flow thing.
The expansion device can effect your pressures to some degree i.e. Cap tube vs. TXV.
As a general rule of thumb, which I use almost everyday when it comes to pressures:
Low side is based on the temp difference between evap temp and condition space in the box. In freezers, it is almost always 10 degrees. If the box is 0 degrees then the evap needs to be at a minus 10 degrees. That is a pressure for R-404A of 24.5 psi. This only holds true when the temp in the box is approching set temp. I would say, about +10 degrees. 0 Degrees for the evap for R-404A is 33.5 psi.
High side should be ambient temp +30 degrees and then convert to a pressure for the refrigerant.
Example: 75 degrees in the room, +30 degrees equals 105 degrees. Now 105 degrees converted to a R-404A pressure is 253 psi. This will get you very close to the desired high side pressure.
I would look at low side first to see if it is within reason. Don't let the high side get too high. Increases the compression ratio and overworks the compressor.
Your icing problem could be a defrost issue and not a refrigerant charge issue.

Good Luck and hope this gets you started.

Apr 07, 2009 | True 49 cu. ft. / 1388 liter Commercial...

2 Answers

Low suction pressure high head pressure


That system has a restriction. Most common at TXV valve or capillary tube. Will need to be replaced by Refrigeration company. In this video I replaced TXV valve and filter drier due to the same issue You have. Its Ice Machine, Low side was at 5 PSI, High at 250PSI : 404A; should be around 55-65 Low; 250 -275 High. Replaced drier and TXV, machine works proper.

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1 Answer

Normal operating pressures


Normal operating pressures will change as the freezer reaches the selected temperatures on the inside. Normals of minus 14 degrees on the inside would be around minus 4 psi on the suction and 150 pis on discharge. Now checking the pressure will require a set of guages that have been purged with the same freon before connecting with the suction line on freezer. If not purged the suction line will draw outside air into the system and cause freezing of air and moisture inside the capillary tube rendering the freezer inoperative, Hope this helps, Sea Breeze

Nov 01, 2007 | Freezers

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