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Air Conditioner Compressor & Refrigerant push ReadingsTypical HVAC refrigerant pressures, quantities, boiling points, chemistry formulasPOST a question or COMMENT about refrigerant pressure readings in wait conditioners, warmth pumps, & other refrigeration equipment
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Refrigerant charge quantity for air air conditioning & heat pumps:This air conditioning fix article collection discusses the the diagnosis and also correction the abnormal waiting conditioner refrigerant line pressures as a method for examining the condition of the air conditioner compressor motor, which in turn, is a step in how we evaluate and also correct shed or lessened air conditioner cooling capacity.We explain how overcharging or undercharging that refrigerant in an waiting conditioner or warmth pump is detected and also we list the effects of overcharged or undercharged refrigerant. We comment on how come diagnose refrigerant pressure problems; how to recognize the ideal refrigerant charge quantity. Definitions of HVACR "high side" & "low side" pressures; usual refrigerant pressures; impacts of overcharged or under-charged refrigerant.We also administer an write-up INDEX for this topic, or you can shot the web page top or bottom search BOX as a quick way to find information you need. What room the common Air Conditioner or warmth Pump mechanism Pressures throughout Normal Operation

Measuring the refrigerant push in air conditioning, heat pump or various other refrigerant systems have the right to diagnose a selection of operating troubles including a refrigerant leak, over charging or under charging.Refrigerant push readings measured at the air conditioning compressor/condenser unit and also which are found to be also low on the high push side (compressor output) or on the low press side (compressor input or suction line) deserve to indicate a trouble with the compressor"s capacity to develop normal operating pressure ranges and also thus will influence the cooling volume of the air air conditioning system.Abnormally high compressor calculation pressures are feasible but less likely. Article series contents REFRIGERANT push READINGS & CHARTS - residence HIGH SIDE, short SIDE press DEFINITIONS usual REFRIGERANT PRESSURES found in wait conditioners, warmth pumps, refrigeration tools for miscellaneous refrigerant gases to compare of REFRIGERANT GAS properties - table just below gives replacements for now-obsolete refrigerants like R22 comparison of REFIGERANT GAS PRESSURES/TEMPERATURES - refrigerant pressure of assorted gases in ~ the exact same temperature? thorough REFRIGERANT TEMPERATURE - pressure CHARTS R134 REFRIGERANT push / TEMPERATURE CHARTS R22 REFRIGERANT press / TEMPERATURE CHARTS - and rules of ignorance R32 REFRIGERANT press / TEMPERATURE CHARTS R410A REFRIGERANT press / TEMPERATURE CHARTS

Comparison that Refrigerant Gase Properties

Refrigerant Gas Properties Replaces / Substitutes GWP1


Pressure Charts & Details

R22 No continuing to be life, R22 REFRIGERANT PRESSURES
R32 R 410A replacement R410A 675 Flammable R32 REFRIGERANT PRESSURES

Domestic HVAC, "Freon"

Short staying life, HFC

CFC instead of 1430 Non-Flammable R134 REFRIGERANT PRESSURES
R290 Pure HC Propane

R12, R22, R134A

Also evaluated as sub for R502

3 Flammable R290 pressure CHART 3
R402A / HP80 HCFC Blend R502 R402A press CHART 13
R404A Short continuing to be life2 3922 R404A pressure CHART 4
R407H Mixrture the R32, R125, R134A, no ozone resistant R22 / R-404A? 1490 Non-Flammable R407H push CHART 5
R408A / FX10 HCFC Blend, Forane® R502 R408A press CHART 13

Domestic HVAC

Short remaining life

R448A Mixture that HFC & HFOs combine R32, R125, R134A, R1234YF, R1234ZW R404A or R507 1273 Non-Flammable R448A / N40 push CHART 6
R449A Mixture that HFC & HFOs R404A 1282 Non-Flammable R449A push CHART 7
R452A Mixture of HFC & HFOs 1945 Non-Flammable R452A pressure CHART 8
R502 CFC, Freon (Chloropentafluoroethane) R-22 / R115 R502 pressure CHART 12
R507 50%-50% Mixture of R-125 and also R-143A R22, R502 R507 press CHART 11
R600A Iso-butane 3 Flammable R600A push CHART 9
R1234YF automotive AC R134A 4 Flammable R1234YF press CHART 10

Comparison of Refrigerant pressure at 30°C / 86°F approximately Temperature

Refrigerant Gas Gauge press - BAR Gauge push - PSIG

Pressure Charts & Details

R290 9.78 141.77 R290 pressure CHART 3
R404A 13.3 190.40 R404A push CHART 4
R407H see R404A / R507 R407H press CHART 5
R448A 11.18 162.07 R448A / N40 press CHART 6
R449A 10.83 157.02 R449A push CHART 7
R452A 12.00 173.97 R452A pressure CHART 8
R502 12.00 173.97 R502 push CHART 12
R507 13.57 196.82 R507 press CHART 11
R600A 3.03 44.00 R600A pressure CHART 9
R1234YF 6.82 98.92 R1234YF push CHART 10

First let"s define "low-side" and "high-side"air conditioner compressor engine pressures and what castle mean.Air conditioning business manuals and also training to express to:Low-side wait conditioner compressor engine pressure: this is the press in the waiting conditioner"s refrigerant suction line(low next pressure during compressor operation) and this will be a fairly low number, oftenless than 100 psi.During operation refrigerant is return to the compressor indigenous the cooling (evaporator)coil in this line. If we associated the suction line straight to a sealed vacuum check gauge we"d actually findthat the compressor can pull an really vacuum ~ above the line. We used to usage an old Frigidaire™ rotary-design compressor motoras our vacuum pump as soon as we necessary to gain the air out of a refrigeration mechanism prior to charging it through newrefrigerant.The low-side the an waiting conditioning device is constantly located inside of the an are to be cooled, or inside of an air handler which moves air v the an are to be cooled. By lowering the press in the cooling coil located on the "low side" the the air conditioning system, the compressor permits liquid refrigerant to be discharged into the cooling coil whereby the adjust of refrigerant state from a fluid to a gas absorbs heat and brings the cooling coil to the proper operating temperature.The low SIDE the a refrigeration system is the low-pressure and low temperature fifty percent of the system. Usually this is the indoor air handler - located inside the space that is to be cooled by bringing at home air to operation temperature. (For a frozen refrigerator this is typically 38 to 45 °F.)High-side wait conditioner compressor pressure: output(high next pressure throughout operation) is the pressure of the compressed refrigerant gas as it pipeline the compressor motor.In other words, refrigerant gas returns to the compressor v the suction line from the cooling coil (which is coolingbuilding air).The low-pressure refrigerant gas is compressed to a high-pressure refrigerant gas within the compressormotor. This high temperature refrigerant gas is then cooled under to condense into a refrigerant liquid prior to it isreturned indoors to the waiting handler and also evaporator coil to be offered to cool structure air. (Thus we get the name thename "condensing coil" and also "condensing unit" or "condenser" for the outside half of one air air conditioning system.)The high side materials of one air conditioning system, such as the compressor, condensing coil, and also fan unit supplied to cool the condensing coil are located external of the conditioned or refrigerated space, and will be immersed in air at ambient the end temperature, to speak 72 °F.Here is whereby the magic of air conditioning occurs. As lengthy as the compressor can produce a temperature in the out condensing coil which is over ambient outdoor waiting temperature, warmth will flow from the condensing coil into outdoor air (for example outdoor waiting blown throughout the condensing coil by a fan).If you studied thermodynamics in high school you learned the heat constantly flows from the warmer come the cooler material. The result is come transfer heat gathered in the at home or conditioned room into out air.The HIGH next of a refrigeration device is at high temperature and greater (refrigerant) pressure and will constantly be over ambient temperature. For this reason in a cooling device it will be located external in order come transfer warmth to the the end air. A heat pump designed to pump warmth into a structure will, that course, reverse t-22hese roles when in heater mode.

Temperature push Charts for usual Refrigerants

HFC R-134A pressure / Temperature chart

Example R-134A Refrigerant Temperature vs push Data
Ambient Temperature in °F1 R134A Vapor pressure at Sea Level R-134A low Side Pressure2 R-134A High side Pressure3
65.71°F (18°C) 65 psig 25-35 psi / 172-241 kPa 135-155 psi / 931-1069 kPa
69.24°F (21°C) 70 psig 35-40 psi / 241-276 kPa 145-160 psi / 1000-1103 kPa
75.86°F (24°C) 80 psig 35-40 psi / 241-310 kPa 150-170 psi / 1034-1172 kPa
90.37°F (32°C) 105 psig 45-55 psi / 310-379 kPa 250-270 psi / 1724-1862 kPa
100.40°F (38°C) 125 psig 50-55 psi / 345-379 kPa 315-325 psi / 2172-2241 kPa
109.4°F (43°C) 145 psig 50-55 psi / 345-379 kPa 340-345 psi / 2344-2379 kPa

Notes come the table aboveOther properties of R134A Refrigerant check out a finish HFC R-134A pressure/temperature graph at HFC R-134A push TEMPERATURE chart - source cited below. R134A temperature/pressure relationship: check out the table over R134A alternate name: 1,1,1,2-Tetrafluroethane or CH2FCF3 R134A boiling point: −26.3 °C (−15.34 °F) at atmospheric pressure (sea level or 1 ATM) R134A density: 0.00425 g/cm3, in gas type - this is a colorless gas R134A molar mass: 102.03 g/mol R134A gas cylinder identification: irradiate blue R134A status: some initiatives to step out usage of this refrigernt, instead of it with HFO-1234yf or othr refrigerants1. Outdoor ambient temperature2. Common low pressure or suction side, may vary by equipment and also metering controls3. Common high next pressure, may vary by equipment4. This psig readings because that R-134A room what you"d suppose the press of the gas to it is in in an enclosed container at the temperature given and at steady state.

HFC R-14 R-22, R404, R134A R404A R407 HCFC-142b & many Other Refrigerant Gases, press / Temperature Charts

Below this table of example refrigerant presures because that R-22, we administer links to complete refrigerant pressure/temperature charts as PDF files that you have the right to download free.

Example R-22 Refrigerant Temperature vs pressure Data

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Ambient Temperature in °F1 R22 Vapor push at Sea Level R-22 low Side Pressure2 R-22 High side Pressure3
0°F (-17.8°C) 24 psig
30°F 54.7 50 psig
32°F (0°C) 57.5
40°F 68.3
50°F 83.8
60°F 101.4
65°F 111 25-35 135-155 psig
70°F (21.1°C) 121.5 35-40 140-165
75°F 132 40-45 150-175
80°F 143.5 40-50 175-220
85°F 170 60 250
90°F 168.5
95°F (35°C) 181.9 68 psi 250+
100°F 196.2
110°F (43.3°C) 226.4
120°F 260.9 260 psi
150°F (65.6°C) 381.7

On a properly-charged and working waiting conditioning device using R-22 refrigerant

R-22 Low-Side pressure = 30 psi in ~ 90°F ambient temperature R-22 Low-Side usual Operating Pressure-Range = 58 - 85 psig (varying by indoor wet pear temperature and also outdoor ambient temperature, where higher heat loads boost the vapor heat pressure) R-22 High-Side press = 2 x approximately temperature (F) + 50 psi OPINION: this dominion of thumb offers pressures a bit greater than shown in our R-22 pressure and also temperature table above. Example: in ~ 75°F Table pressure: R-22 High-Side push = 150-175 psig calculated pressure: R-22 High-Side pressure = (75 x 2) + 50 = 200 psig - you must take this together an upper limit.

Refrigerant Pressure/Temperature graph & Table Downloads

Example R32 Refrigerant Pressures

See these complete refrigerant pressure/temperature charts together PDF documents that you have the right to download

Example R-32 Refrigerant Temperature vs push Data
Ambient Temperature 1

Ambient Gauge press psig / Bar

R-32 short Side Pressure2 R-32 High next Pressure3
0°F (-18°C) 48.72 / 3.36 105 psi 450 psi
32°F (0°C) 103.21 / 7.12
68°F (20°C) 199.13 / 13.73
86°F (30 °C) 264.8 / 18.26
96.8°F (36°C) 310.89 / 21.44
107.6°F (42°C) 362.51 / 25
150.8°F (66°C) 634.81 / 43.78

Notes to the table aboveOther Properties because that R3 Refrigerant ambient temperature about the compressor/condenser unit suspect a suction side temperature of 2°C / 35.6°F suspect a discharge temperature that 51°C / 123.5°F R32 has a low GWP that 675. I. R32 is a replacement for R310A and also is a "low-flammability" refrigerant gas. Through 2025, high worldwide Warming Potential (GWP) refrigerants with a GWP of over 750, will be banned along with the systems using the gas.

Example R-410A Refrigerant Pressures

For every refrigerant form you use, you"ll want to pick up a Refrigerant Pressure/Temperature graph from your supplier. A usual R-410A refrigerant pressure/temperature graph will offer refrigerant pressure at miscellaneous (ambient) temperatures varying from below freezing to over 160 °F. Here are a few examples:
Example R-410A Refrigerant Temperature vs press Data
Ambient Temperature in °F1 R410A Vapor push at Sea Level Temperature (°C) R-410A short Side Pressure2 R-410A High next Pressure3
-10°F 26.9 psi -23.3
0°F 48.4 -17.8
10°F 62
32°F 101.4 0
40°F 119 83 psig 257 psig
45°F 120 130 418
51°F 145
55°F 155
60°F 170.7 15.6
62°F 175
64°F 180
66°F 185
70°F 201
72°F 205
73°F 210
75°F 218.7 23.9 120 psig 410-420 psig
76°F 220
80°F 236.5 26.7
82°F 240
84°F 250
85°F 254
87°F 260
90°F 275
93°F 290
95°F 296.4 35
97°F 305
100°F 318.6 37.8
109°F 365
110°F 366
118°F 405
134°F 500
150°F 613.9 65.6

note to the table above Typical short Side Pressure selection for R410A in the field: 115-120 psi common High side Pressure range for R410A int eh field: 410-420 psi by 2025, high worldwide Warming Potential (GWP) refrigerants v a GWP of end 750, will be banned together with the solution using that gas. R410A has a GWP > 2,000. R410A Refrigerant rules of ThumbOn a properly-charged and working air conditioning device using R-22 refrigerant

R-410A Low-Side usual Operating Pressure-Range = 102-145 psig (varying by at home wet pear temperature and also outdoor approximately temperature, where higher heat loads rise the vapor heat pressure)

Example R410A Evaporating & Condensing temperatures & Suction & Head pressure vs pear temperatures
Evaporator Temp °F Condenser Temp °F Suction press psia Head press psia Indoor Temp °F dried Bulb Outdoor Temp °F Dry/Wet Bulb
40°F 115°F 83 257
86 299 60°F 30/28°F 4
103 329 60°F 40/38°F 4
124 379 60°F 50/47°F 4
45°F 120°F 130 418 3
146 430 60°F 60/57°F 4
145 461 70°F 60/57°F 4
144 490 80°F 60/57°F 4

See more: How Much Is 46 Inches In Feet Conversion Calculator, 46 Inches To Feet Conversion Calculator

R22 REFRIGERANT pressures will display what pressures are discovered with R22 refrigerant

What is the working gas push for R22 in the aircon

The compressor is running however the gauge press is 102 lowside and also 175 highside ( r-22 system). The residence is hot. What is the problem and what action needs come be required to correct the problem?

Hello I have a 2011 Hyundai Elantra GLS 1.8 engine. Newly I to fill the refrigerant 2 weeks back and the time cooling was great. However now the cooler than prior to I examine with press gauge it’s saws when car is run with full ac top top is 40 psi and when automobile is off it’s saws 85 psi on low side. Please imply what is the problem? thanks in advance. Please suggest me those is perfect pressure keep on low side when ac charge.

AnonYou can discover your refrigerant push in the article and also references above, but youll view you need to name the specific refrigerant gas ans the ambient temperature.

How countless suction gas press in 11 tr ac

Yes, Carl, and thanks for asking. "Around 40" - room you introduce to approximately temperature, refrigerant line temperature or other else? typically on a heat pump top top the suction heat the saturation temperature will be set to about 20 come 25 degrees F listed below the outdoor ambient temperature. The refrigerant doesn"t know if it"s being provided in heating mode or cooling mode; the temperature/pressure charts because that R410A and also for other refrigerants only current pressure and also temperature ranges.

when installation 410a is the push gauge around 40 the exact same on a warm pump together it is on a continual air conditioner

Dave, take a look in the refrigerant press tables given in the article on this page - for R410A because that example. When the A/C system is OFF and has been off long sufficient for pressure to equalise throughout the thermostatic development valve, both high-side and low-side pressures will certainly be the same.The measured pressure of the refrigerant, when the compressor has been off for a time and also the HI and LO sides are equalized, is just a function of the approximately pressure and of course her elevation above sea level.For example, R410A, in ~ an ambient temperature the 60°F will have actually a press of 170.7 psi. Once the unit is operation the head push goes up and the suction side press goes down. We define operating pressures in tables and also in note to the tables offered here. Because that example, typical low press or suction side push for R410A is around 120 psi, differing by ambient temperature, right here assuming 75°F, may vary through equipment and metering controlsTypical high side press for R410A is give thanks to you for asking. >

On a separation system waiting conditioner, what have to the approximate pressures be at condensing unit using 410A or 32A when the unit is off?And what must the press be when the unit is operating?

Hi, firstly I desire to give thanks to you for producing such a beneficial site - store it up!I just have a couple of questions about inverter A/Cs - In a split-type house air conditioner which usage an inverter compressor, does this impact the PSI needed on either the high or short side the the system?If so just how do I recognize what the is an alleged to be? Is the technique for adding refrigerant different for inverters than a typical system? and is over there a way to recognize at any point in time if the compressor is running at full speed or just partly?Thank girlfriend Reply:The psi you"d intend to view in any HVACR device is a role of:1. The certain refrigerant used2. The ambient temperature

3. The compressor having actually reached secure state or operation long enough that the low side and high next pressures room being controlled by the refrigerant metering device such together the TEVFor any specific refrigerant you"ll uncover a chart that offers the relationship of refrigerant pressures to temperature - together the tech has actually to think about that once charging the system.The data tag and also specs for a given compressor model and brand will also often offer the conventional working press range.For various other readers, one "inverter" in an wait conditioning system is a variable speed control that changes the pumping rate of the AC compressor motor in an answer to the temperature in the conditioned space.By differing the compressor rate we vary the price at i m sorry refrigerant is dispensed right into the cooling system. In my OPINION this is a sophistication of an air conditioning style that relies only on the refrigerant metering maker (TEV or cap tube) to dispense refrigerant right into the cooling system.Inverter designs perform not just rely on varying the compressor motor speed. Motor on/off cycling, configurations the bypass refrigerant warm gas calculation from the high-side end to the low side or suction side of the system, mechanically operated refrigerant manage valves, and other approaches enable for one inverter type air conditioner or warmth pump design.The purpose of an inverter form air conditioner device is to enhance the compressor"s output to variations in the cooling pack on the system, presumably creating a an ext efficient cooling system.These systems may also be explained as VRF or change refrigerant flow designs.I"ve researched this concern further yet not yet discovered specifiations indicating the the refrigerant operation pressures are different with an inverter or VRF air conditioning or warm pump design. Ns have discovered warnings that reduced refrigerant velocity can an outcome in lubrication troubles in the compressor and also a lessened compressor life.Heatcraft warns:Compressor operating Limits: Compressors should not it is in operated exterior of the operating borders shown ~ above the published compressor specification sheets, and low pressure controls have to not be set below the minimum settings without prior written approval that the Copeland Application design Department. Operating below the allowable minimum suction push may result in extreme discharge temperature which can reason cylinder and also valve damage, and may result in lubrication problems. Since high discharge temperatures have the right to occur also though the motor is cool, the motor thermostat will not protect the compressor versus these conditions.

operation of motor-compressors beyond the established recommended operating borders will be thought about misuse and also abuse, and damage might result. - source: Heatcraft, "Why and also How we usage Capacity regulate " , Heatcraft Refrigeration assets – north America, 2175 West Park location Blvd. Rock Mountain, GA 30087 United states of America Tel: (770) 465-5600 Toll-Free: (800)-321-1881 hrpd.feedback