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What is the low pressure for a 410a 3 1/2 York when is 90temp at fh outside.

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Thomas Woodburn

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The outside ambient temp has little effect on the suction pressure. The indoor temp is what will slightly effect the suction pressure. In the trade we say we want a 40 degree evap coil, this means approximately 125psi. This is when the indoor temp is around 74 to 78 degrees. The hotter the house, the higher the pressure. I like to see a 50 degree evaporator when the indoor temp is above 80. Charging by subcooling is the way to go!!

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Posted on Sep 22, 2017

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239gatorac

Thomas Woodburn

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SOURCE: What is a 410A 3 1/2 ton air-conditioner low pressure at 80 degrees

??? 80 degrees ??? Anything below 100 psi is going to start freezing up. 410a refrigerant is approximately 32 degrees at 100psi. Typically a 410a low pressure switch will open at 50 psi.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Posted on May 08, 2017

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1 Answer

What is a 410A 3 1/2 ton air-conditioner low pressure at 80 degrees


??? 80 degrees ??? Anything below 100 psi is going to start freezing up. 410a refrigerant is approximately 32 degrees at 100psi. Typically a 410a low pressure switch will open at 50 psi.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

May 08, 2017 | Heating & Cooling

Tip

R-410A The New Refrigerant for Air Conditioning


R-410A possesses excellent cooling capacity and operates at 50% higher pressure. R-410A is a mixture (blend) of refrigerants that create properties nearly identical to R-22, but are free of ozone depleting chlorine molecules. R-410A was developed in response to an agreement between numerous countries (known as the Montreal Protocol). That stated that those countries would move toward discontinuing the use of hydrochloro-fluorocarbon (HCFC)-based refrigerants. R-410A, chemically known as an HFC (hydrofluorocarbon), contains no chlorine and will not damage the ozone layer.

R-410A is an azeotrope mixture of R-32 and R-125. R-410A cannot be used to retrofit existing R-22 a/c equipment due to significantly higher operating pressures and much higher cooling capacity as outlined in the chart below. R-410A when operating at normal operating pressures and temperatures has higher pressures. R-410A cannot be used as a "drop-in" replacement for R-22; the higher operating pressures will damage R-22 compressors and components. Therefore the old R-22 refrigerant systems needed to be buffed up some to handle the higher pressures. Because of this R-410A and R-22 equipment cannot be cross matched.

R-410A has unique performance specifications and characteristics for oil, moisture indication, thermal expansion valves, compressors, filter driers and refrigerant handling. R-410A air conditioners use newer synthetic lubricants that are usually more soluble with the R-410A than the old mineral oils are with the older R-22 refrigerants. R-410A systems use mineral oils for lubrication. R-410A systems can be more reliable than R-22 systems. R-410A air conditioners and heat pumps are today's "state of the art" systems, and utilize the most current technology available for efficient and reliable operation.

R-410A was developed to replace the ozone depleting R-22 refrigerant now used in most residential and some commercial air conditioning equipment. R-410A has no ozone depletion potential but does have a higher global warming potential.

R-410A has quickly become the refrigerant of choice for use in air conditioning applications because the refrigerant delivers higher efficiency and better Total Equivalent Warming Impact (TEWI) than other choices. Make sure that if you are installing a new air conditioning system, that you specify that the new system uses R-410A. Not only is a R-410A system more reliable, but remember that R-22 use will be discontinued in 2010. An R-410A system will give you the best and most effective service for the foreseeable future.

on Dec 14, 2009 | Heating & Cooling

1 Answer

Ice hitting outside fan


It sounds like your system might be low on coolant. Check the pressure of the main line and check it against the specs. You may have a leak in the system.

Mar 02, 2015 | Rheem 12,000 BTU Mitsubishi 13 SEER R-410A...

1 Answer

Can I buy a new inside unit for a MS24WN outside unit


EPA regulations: Freon 22 units are no longer available, Units that are compatible are available They come pre charged with nitrogen It must be dumped. If there is freon in the old system it should be pumped down into the condenser unit before the inside unit is removed, Close the high side king valve and run the unit until the low pressure reads near O Close the low pressure king valve. and turn unit off. 410A freon units are readily available. Most if not all 2 ton air handlers will work with any outside 2 ton unit though some building codes will not allow a mix. Their reason: if something fails who is to blame:

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1 Answer

What are the running compressor pressures H&L


Thats a hard question to answer! what Type of refrigerant is in it? R-22 or R410A? If its R-22 you want to see about 60-65# low side and 225 -240 high side. those can vary with outside temperature. R-410A look for 120# low side and 450-475# high side. DO NOT USE R22 MANIFOLD SET ON R410A SYSTEM!! IT WILL NOT TAKE THE HIGH PRESSURES AND COULD EXPLODE.

Aug 12, 2014 | Intertherm P3RA-036K Air Conditioner

1 Answer

How do you put in 410a into Ac unit


You turn system on to cool setting and run temp down until outside unit comes on. Then you connect your suction side of your gauges to the suction side of your outdoor unit. Next you connect the liquid(high)side of your gauges to the liquid line on your outside unit(the little copper line). Connect the middle hose of your gauges to the 410a drum of refrigerant. Before opening the suction or low pressure side of the gauges you need to turn the drum upside down and turn drum of 410a on. Then you need a temp reading meter and clamp to read the temp of your liquid line(small line). While charging you want to make sure to release refrigerant slowly. The unit should call for a specified subcooling on unit plate. 7 to 10 degrees. You take the liquid line temp and subtract it from saturation temp on the high side of your gauges.(it'll be the pink numbers on the right side of your gauge.

Jun 05, 2013 | Heating & Cooling

2 Answers

Do you have to charge a 3 ton 410a unit split as a liquid? on a 85 d day


Hi,
It is always best to charge 410a as a liquid to ensure that you get the proper mixing of the refrigerant...just turn the can upside down and take your time adding the liquid slowly...with the unit running.

heatman101

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York 92 % eff. furnace shuts down on # 3 error (pressure switch)


i have fixed almost every one of pc9 -----we have installed in our company,code three{flashes} at first new presure switches installed, same thing,york knows about this,induction motor bearings,could be bad.our local york dist, has boards,inducer, ***.motor, dual press.switch,free.as is known as the only way to fix.after all else is ruled out.one local competator called us if we wanted to join class action suit . good luck.furnaces work good at first, season or two then bam

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