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Commercial freezer 404 system what is the correct vaporat ing temp or psig

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If you are asking about the pressures that are on the compressor, you need to be aware of the temp of the room that it is in and you need a manifold guage set.

Posted on May 15, 2014

  • sameer May 15, 2014

    Thanks brad I'm a hvac tech I do use a sman3 manifold just that I wanted some info on correct L sat temp to to get box temp of -30 degr

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SOURCE: Temperature alarm is on on

i would make sure that the coils are all clean, inside and out. make sure the fan runs on the back, the water pan isn't over flowing.

Posted on Jun 25, 2010

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SOURCE: I have arctic air commercial freezer m # F2CW11

Good day,
When running, the low side is usually about 2 to 4 lbs pressure. The high side is determined by the load and the temperature in the room or area. Minimum 125 lbs. maximum approx. 150 lbs.

Posted on Oct 28, 2010

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Our Freezer is not running correctly and is staying at a temperature of about 40 degrees. The temperature display reads REC. Please help. Thanks


REC means recovery. It is trying to make temp and is not. Could be frozen up evap, no fan running, door not closing, issues with the refrigeration system.

Jun 19, 2015 | Hoshizaki Commercial Freezer SafeTemp®...

1 Answer

I have arctic air commercial freezer m # F2CW11 s/n# WB338336 freon R134a what psig ? low side and high side when system on


Good day,
When running, the low side is usually about 2 to 4 lbs pressure. The high side is determined by the load and the temperature in the room or area. Minimum 125 lbs. maximum approx. 150 lbs.

Oct 28, 2010 | Arctic Air 22 cu. ft. Commercial Freezer...

1 Answer

What is the normal operational pressure in lo/hi side at the compressor of commercial freezer like dispaly case, reach in cabinet or other any low temp refrigeration uses 502 or408A/404a. is there any rule...


why yes there is. Generally speaking, the head pressure should be around the "ambient +30" rule.
That is, measure the entering air temp to the condenser, say 75 degrees. Now add 30 to that and get 105 degrees. Look at a P/T chart and see what the pressure is for that temp which is about 253 for R-404-A.
The evap on a freezer leads the load so, as a general rule, the evap temp is going to be around minus 10 degrees to get a 0 degree box. Coolers are different. So, the pressure for a minus 10 evap is around 25 or so. But the unit has to be close to operating temp. If the box is warm, naturally the pressure is higher. And what influences the pressure is whether or not it's a TXV or a cap tube system.
If a TXV and no receiver, charge by subcooling. If a receiver, fill by sight glass. If Cap tube, charge by superheat.
Hope that answers your question.

Oct 03, 2010 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Correct suction line pressure


If it is R22 then it will be about 11psig on the suction side. This should give you a -18 degrees across the coil.

Jun 30, 2010 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

What could cause an evaporator coil to freeze up on a true t-19f. Also what is the suction pressure on this model.


Hello
Could be low on freon,i belive this model uses 134A.

So the suction pressure should be 31 to 35 psig,for a temp of 36 to 40.f

Also check the defrost timer and the door seal. The eveap should have a drain line on it, make sure this is working and not plugged.

Apr 07, 2010 | True 19 cu. ft. / 538 liter Commercial...

1 Answer

WHAT IS THE CAPACITY OF MODEL F-450BAE FLAKER


It is to produce 450 pounds of ice in 24 hours under ideal conditions. Manual says anywhere from 345 to 440 depending on factors of water temp., ambient temp., and system pressures.
Hope this is what you are looking for.

Mar 03, 2010 | Hoshizaki Freezer Commercial Ice Machines...

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...

3 Answers

Normal Operating pressure for true 2 door Freezer R404A Room Under 80 degrees F Box at -10 degrees F


The pressures depend, somewhat, on the expansion device,i.e. a TXV or Cap Tube. Take a pressure reading, then convert it to a temperature. The evap temp should be right at 10 colder than the box temp. Remember, heat flows to cold so the evap has to "Lead the Load" in order to cool. In many cases, the condensing pressure is usually ambient temp, plus 30, then convert to a pressure. These are general accepted practices that have been used for many years.

Hope this helps

Jul 11, 2009 | True 49 cu. ft. / 1388 liter Commercial...

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