Question about Coldtech S3BRR-18S Commercial Refrigerator

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How many psi do I need to charge for a model s3brr18s

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You will need to know which type of Freon is being used if it is 134A it should be around 1 to 2 on your gage

Posted on Nov 23, 2013

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Working pressure


Putting 60 lbs. of pressure in the pressure tank is not the answer.

First determine that the pump is working correctly, Open the drain valve and see if you get a good flow of water. If you do then OK, the pump is working. If you are not getting a good water flow from the drain valve, then the pump is not operating correctly - maybe a bad foot valve. Next open the drain valve and watch the water pressure gauge, and note at what pressure the pump kicks on ( that's the cut-in pressure), and when it kicks off ( that's the cut-out pressure). Most pumps are set to operate at 20-40 psi, or 30-50 psi. The cut-in and cut-out pressure is set by the water pressure switch.The pressure in the water tank has to be set 2 psi BELOW the cut-in pressure of the pump. That is, if the pump has a 20-40 psi differential, then the tank has to be pre-charged to 18 psi.

To pre- charge the pressure tank , the pump has to be shut off. The Tank needs to be emptied (drained ) of water. The air pressure is then set to 2 psi BELOW the cut-in pressure. If water escapes from the air valve, the bladder in the tank is ruptured, and a new tank needs to be installed.

So, first make sure the pump is working.
I WOULD RELIEVE MOST OF THE PRESSURE IN THE PRESSURE TANK TO ABOUT 20 PSI BEFORE CHECKING THE PUMP, AND PRCEEDING WITH THE PRE-CHARGE OF THE TANK.

May 24, 2014 | Plumbing

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I have a new 1 hp utiltech pump and a new. Precharged tank with 34 psi in it now. When i prime the pump the pressure goes right to 25 psi and i can hear some water moving . When i open the shut off valve...


The 34 psi of the pressure tank sounds high, but it depends on what the cut-in pressure is set at in the pump pressure switch. Typically the pressure switch is for 20-40 psi or 30-50 psi. To establish what the pre-charge of tank should be , you need to establish what the pressure switch setting are (i.e 20 - 40 psi , etc.) Run the water and watch the pressure gauge and note at what pressure the pump comes on. The pressure tank needs to be pre charged 2 -4 psi below that cut-in pressure. So if the cut-in pressure is say 30 psi, then the tank needs to be pre charged to 28 psi.
To pre charge the pressure tank, turn the pump off. Drain the pressure tank of water to relieve all pressure in the tank. Then check the pressure of the tank at the air valve. Set the pressure to 2 psi below what the cut-in pressure is.
If you adjust the pressure switch, say from 20-40 to 30-50, you will need to go through the procedure of re adjusting the pressure in the tank. I hope this helps....

May 21, 2014 | Plumbing

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Pump not holding presure


If you have a bladder - type water pressure tank, it probably needs to be purged of air and then pre-charged to 18 psi. There may be directions on the side of the tank. Turn the water Pump off. Drain the tank of water. Check the pressure of the tank at the air valve on top of the tank. The pre-charged pressure of the bladder is set to 2 psi below the lower pressure set by the pressure switch, so in your case, the low end pressure is 20 psi. Therefore, the pre-charge pressure of the tank is 18 psi. If you set the pressure switch to operate at 30 -50 psi, then the pre-charge pressure would be 28psi., etc. Once the pre-charge pressure is set, turn the pump back on. ( don't forget to close the drain valve). The system should cycle normally. A tire gauge works to check the tank pressure. An air compressor may be used to charge the tank, but be careful not to over- inflate the bladder. A tire air pump may also be used. Hope this helps....

Apr 06, 2014 | Utilitech Plumbing

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My sand point well the water stops and starts again


You probably need to purge the pressure tank.
Well Pressure Tank Installation Instructions

Pressure tanks lose their Pre Charge pressure and have to be serviced. The well Pump needs to OFF. The Pressure tank needs to be emptied of water. There should be an air valve on the tank. Check the pressure .If this is a Bladder tank and Water comes out of the air valve- then the bladder is broken and the tank needs to be replaced. The Pre Charge pressure is set to 2 psi Below the cut-in pressure set by the pressure switch. If your system operates at 20-40 psi, The Pre Charge pressure will be 18 psi. Hope this helps.....

Mar 18, 2014 | Bur-Cam Pumps 750896 Water Shallow Well...

1 Answer

Charge air pro model ir330e20 builds pressure to only 60 psi and will not stop running


Cbillgreene:

Your compressor is leaking air somewhere between the compressor head and the tank. With the compressor running, feel carefully around the ends of the tube that leads from the compressor head to the air tank. You will probably feel some air leaking around one end or the other. If so... remove the tube and find out which packing has failed.

Mar 09, 2013 | Craftsman Air Tools & Compressors

1 Answer

Hello, I have a Calvinator A410 unit that I am working on it is a heat pump, I had a leak remove freon and vacummed for around 5 hours. Having a problem charging the unit as a thermo protect on the...


There should be a name plate with the model and serial # which will tell you what the factory charge is for the unit plus 15 to 25 feet of line set. If you weight in the charge you should be pretty close...... In AC mode you should run around 125# suction and about 265 head pressure with 70 degree ambient F. If you have the right charge in the heat pump and you are still running 25# suction pressure in the Air Condition mode then you have a restriction filter drier or TXV locking up..... Did you replace the filter drier when you fixed the leak was the leak on the suction side if so then you definitely need to change the filter drier.

May 01, 2011 | Heating & Cooling

1 Answer

I just finished charging it it's at 100 psi low side tube gets cold right at fill point rest of system does not. Dryer is hot.


100 AT PSI ON THE LOW SIDE TOO MUCH REFRIGERANT.LOW SIDE NEED TO BE 28 PSI. HIGH SIDE SHOULD BE 200 PSI.YOU NEED A MANIFOLD GAUGE SET TO SEE YOUR LOW AND HIGH PRESSURE SIDE.YOU PUT TOO MUCH REFRIGERANT IN AC SYSTEM IT WILL EXPLODE CAUSE SERIOUS INJURY AND DAMAGE THE COMPRESSOR.

Jun 11, 2010 | 1997 Audi A8

2 Answers

I have a model FP209501 Air Compressor 2 Gallon,


2 gallons is small to begin with u need to buy an in line pressure adjuster/regulator their a few bucks and can be attached to the paint gun or line and will keep the pressure at ur adjustment the regulator on the tank sets the tank pressure at 50 so when u us it will let it drop down to about 45 than start up to build the pressure up to 50 than shuts off than repeats it self the inline keeps pressure steady even if tanks are at 200 psi

Jan 18, 2010 | Campbell Hausfeld 04 Gallon Twin Stack...

2 Answers

Need to add freon


With the air temperature 90 degree's look for low side to be 68.5 psi and the high side to be 250 psi. The air temperature is outside air not inside the house air okay. You want 8 to 12 superheat to be perfect. Now if you are talking about a high efficient unit make low side 75 psi and high side 225. Do you know the SEER rating on this unit?

May 02, 2009 | Heating & Cooling

2 Answers

1997 Deville ac compressor locked out - low


70 psi static does need a charge.find compressor relay, jump relay and compressor will start. add refrigerant,replace relay and a/c should work fine

Apr 16, 2009 | 1997 Cadillac Eldorado

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