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How much pressure is accurate in R407c refrigerant air conditioning units pleasse give me the details of ideal suction and discharge presuure.. i hope u wil reply

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Noma a/c cq120 makes noise in compressor area and casing is hot to touch. Is compressor going? Is it worth to repair or buy new. I'm guessing this unit is 4 years old or more


Possible Causes There are several reasons for a compressor to run too hot, including high compression ratio, high return gas temperatures, and lack of external cooling.High compression ratios are the result of either lower than normal suction pressures or higher than normal discharge pressures. Changes in suction pressure will affect the compression ratio more rapidly than changes in the discharge pressure. For this reason, it is important to keep the suction pressure at its highest possible value.
Causes of low suction pressure can include incorrect sizing of components, misadjusted or defective metering devices (TXVs), loss of refrigerant charge, plugged driers or strainers, and excessive suction line pressure drop.
Although not as sensitive to change as the suction pressure, the discharge pressure can still greatly affect the compression ratio. Keeping the discharge pressure within normal operating conditions is still important.
Causes of high discharge pressure can include dirty condensing coils, undersized discharge line, a blockage or recirculation of condenser air, erratic condenser fan operation, refrigerant overcharge, noncondensibles in the system, and an undersized condenser.
Many larger refrigeration systems with electronic controllers will automatically monitor the temperature of the discharge line and will send out an alarm to alert the owner or service contractor of a potential problem. Regardless of how the discharge line temperature is monitored, it should always be checked as part of any service to a refrigeration system.
A technician should also check the discharge line temperature within 6 inches from the outlet of the compressor. Any temperature above 225 degrees should be investigated and the cause found and repaired.

Jul 26, 2017 | Refrigerators

1 Answer

Operation pressure


suction pressure should be about -4 inches of mercury and discharge pressure should be around a hundred and fifty. do not put the gauges on to the suction line while is running or you will draw air into the sealed system. attach a gauge is only when the unit is off and equalized

Appliance 911 Sea Breeze

Sep 30, 2015 | Metalfrio PICL3-92-12 Pizza Prep Table...

2 Answers

Charging an air conditioning system


R22 systems should run a 68# to 70# suction pressue. If you look at the suction guage at 68# that is a 40 deg evaporator coil temp.

Nov 18, 2012 | Ruud Central System Air Conditioner

2 Answers

Commercial refrigeration motor over heating and low suction press


Add 404A to system. It is low on gas. But kep an eye on the TXV for ice buildup. Make sure unit is free of ice before you charge it. It is difficultr to charge a refer system when itis iced up. Rus

Dec 17, 2009 | Kenmore 20.6 cu. ft. Top Freezer...

1 Answer

Superheat Problem


Superheat is the dif. between suction temp on the gauge and temp on the suction line. Make sure you are measuring the right line/ Normal superheat is between 10 to 14 degrees depending on line length. Russ

Aug 15, 2009 | Heating & Cooling

1 Answer

How to add Freon R407C to a ductless air conditioning unit


If you are not trained to at least charge a unit U will in the end do more harm than good get the proper service. what makes U think U need freon could just be dirty? Tom

Jul 10, 2009 | Heating & Cooling

1 Answer

Air conditioning spilt system


I have to know what the outside temp is and I also need to know the seer of the unit. It would also help to know what the indoor temp is as well. Generally your suction pressure or what you are referring to as the indoor temp will be about the same. Let's say your indoor temp is 75, then your suction pressure should be around 75psi as well. Based on the suction pressure you just gave me, I would bet that the temp is not 38 degrees. With the suction at 38 and a low head or high side, you may be low on refrigerant. 110 is a little low but again, this depends on the seer rating of the unit. A higher seer will have a lower head.

Apr 08, 2009 | Heating & Cooling

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Match up Carrier equipment


carrier did sell some systems with R407c as a quick fix to gov regulations for about 2 yrs. R407c is a blend . and is treated like R410a except R407c pressures are more simular to R22. being that the pressures run the same the system should work with out changing any parts that being said if the evaporator has been used for R22 the oil residue wiil give you problems ifit is a new unit you would be ok.

Jan 08, 2009 | Carrier 38CKC042 Air Conditioner

2 Answers

Air Condition


it sounds like a loose compression compressor.

if the compressor is loose compression, normally it sounds noisy. then suction pressure is above normal and if you accelerate and maintains that high speed, let say 2000 rpm, the suction pressure goes down to the normal level and cools your air conditioning .

tnx 4 using fixya...

drcool

Aug 29, 2008 | 2004 Nissan XTerra

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