What Should the Readings Be on My Guages for R22 Freon Outside at 102 Temp

Air Conditioner Compressor & Refrigerant Pressure level Readings
HVAC refrigerant pressures, quantities, boiling points, chemical formulas, Global Warming Impact GWP & ODP data

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Refrigerant accuse quantity for air conditioners & heat pumps:

This air workout repair article series discusses the the diagnosis and correction of aberrant air conditioner refrigerant line pressures as a ways for evaluating the status of the air conditioner compressor motor, which in turn, is a step in how we evaluate and right lost or reduced air conditioner cooling capacity.

We explicate how overcharging or undercharging of refrigerant in an air conditioner or heat pump is detected and we list the effects of overcharged or undercharged refrigerant. Nosotros discuss how to diagnose refrigerant pressure problems; how to make up one's mind the proper refrigerant charge quantity.

Definitions of Heating Ventilation Air Conditioning & Refrigeration (HVACR) "high side" & "depression side" pressures; typical refrigerant pressures; effects of overcharged or nether-charged refrigerant are institute hither equally well.

We too provide an ARTICLE INDEX for this topic, or y'all can try the page height or bottom SEARCH BOX every bit a quick way to discover information you lot need.

What are the Typical Air Conditioner or Estrus Pump System Pressures During Normal Functioning

Measuring the refrigerant pressure in air conditioning, rut pump or other refrigerant systems can diagnose a range of operating issues including a refrigerant leak, over charging or nether charging.

Refrigerant pressure readings measured at the air conditioning compressor/condenser unit and which are found to exist too low on the high pressure side (compressor output) or on the low pressure side (compressor input or suction line) can signal a trouble with the compressor's power to develop normal operating force per unit area ranges and thus will impact the cooling capacity of the air conditioning organization.

Abnormally loftier compressor output pressures are possible only less probable.

Refrigerant Pressures & Pressure Diagnosis

• High SIDE, Depression SIDE PRESSURE DEFINITIONS
• TYPICAL REFRIGERANT PRESSURES institute in air conditioners, heat pumps, refrigeration equipment for various refrigerant gases
• Comparison of REFRIGERANT GAS Properties - table merely below gives replacements for now-obsolete refrigerants like R22
• COMPARISON of REFIGERANT GAS PRESSURES/TEMPERATURES - refrigerant pressure of various gases at the aforementioned temperature?
• DETAILED REFRIGERANT TEMPERATURE - Pressure level CHARTS
• R134 REFRIGERANT Pressure / TEMPERATURE CHARTS - separate article
• R22 REFRIGERANT Force per unit area / TEMPERATURE CHARTS - and rules of pollex - separate article
• R32 REFRIGERANT Force per unit area / TEMPERATURE CHARTS - split article
• R410A REFRIGERANT Pressure / TEMPERATURE CHARTS - carve up article

Refrigerant Pressure & Leak Correction

If you lot already know your refrigerant pressures are wrong or that you have a refrigerant leak, please see

• CORRECTING REFRIGERANT PRESSURE & LEAKS
• REFRIGERANT CHARGING PROCEDURE

Overview of Refrigerant Types - by and current

The types of refrigerants tin can be a confusing soup of acronyms. Here's a summary of the dissimilar types of refrigerants:

• CFCs are ChloroFluoroCarbons - showtime generation refrigerants like R12 (early replacements for still earlier & harder-to-use CO₂ refrigerant) & R22 (1950s & later) widely used in refrigerators and air conditioners.

  R12 was phased out in the US in 1994. R22 was phased out in 2010 and are no longer widely bachelor.

• HCFCs = HydroChloroFluoroCarbon - refrigerants that were considered less dissentious to the environment than CFCs. Less harmful to the ozone layer.

  HCFCs and CFCs both contain chlorine that was found to damage the earth's ozone layer. The Montreal Protocol was an agreement to phase out both CFCs & HCFCs.

• HFCs = HydroFluoroCarbons - a 3rd generation of refrigerants less damaging to the ozone layer were intended to replace older refrigerants.

  Electric current HFCs were considered less damaging to the surroundings than CFCs and HCFCs.

  HFCs are fabricated upward of hydrogen, fluorine, and carbon. They are at present recognized as a serious contributor to greenhouse gases and global warming.

In sum there were at least two classes of damage:

Holes in the ozone layer:

Chlorine-containing refrigerants that contributed to the ozone hole (consider getting skin cancer in Commonwealth of australia). These include CFCs and HCFCs.

Greenhouse gases:

Greenhouse gas formation that contributes to global warming. These include HCFCs and HFCs.

Environmental Alternatives

The EU has proposed more climate-friendly alternatives to HFCs. The commodity beneath provides a more-extensive list of alternatives to HFC type refrigerants.

• CLIMATE FRIENDLY ALTERNATIVES to HFC REFRIGERANTS - Eu [PDF] European Commission for Climate Activeness, (This department leads the European Committee's efforts to fight climate change at Eu and international level.)
  European Commission, Charlemagne building, Rue de la Loi 170, 1040 Brussels Belgium (Visitors Centre), Web: https://ec.europa.european union/info/index_en - retrieved 2021/12/22, original source: https://ec.europa.eu/clima/eu-action/fluorinated-greenhouse-gases/climate-friendly-alternatives-hfcs_en).

In choosing refrigerants that reduce or eliminate the contribution of those products to global warming, alternatives include:

• Natural refrigerants
• HFCs with lower GWP, such equally R32
• Hydrofluoroolefins (HFOs)
• HFC-HFO blends

More well-nigh environmental concerns updates at

REFRIGERANT Blazon & ENVIRONMENTAL CONCERNS UPDATE

Comparison Table of Refrigerant Gas Properties

Comparing of Refrigerant Gas Backdrop
Refrigerant Gas	Backdrop	Refrigerant Blazon fourteen	Replaces Substitutes20	Replaced By20	GWPi	ODP1	Com- bustibile ane	Pressure level Charts & Details
R11	Trichlorofluoromethane CFC-11 = Freon-11 = R-11. Banned-1996 Montreal Protocol	Cfc			4000	one.0	Y	Basis for ODP comparisons
R12	Dichlorodifluoromethane Freon No remaining life Banned-1996 Montreal Protocol	CFC HFC		R124 R134a R401a R401b	2400	1.0	N	n/a
R12 B1		CFC		R124, R142b			North
R13 B1	Bromotrifluoromethane Halon 1301 or BTM CBrF3	CFC Halon		R410A, ISCEON® MO89 R402B?		10	N
R22	Chlorodifluoromethane No remaining life Do non get to R-410A	HFC HCFC	R404A	R407c ?	1700	0.05	Y	R22 REFRIGERANT PRESSURES
R23	Additions banned 1 Jan 2020 Reclaimed use permitted to end of 2029	HFC	R13, R503 Halon 131		18,400	0	N
R32	Difluoromethane, CH2Ftwo Use in new equipment	HFC	R134A ? R410A ?				N ?	R32 REFRIGERANT PRESSURES
Eco 32	Blend: Propane R290 + Ethane R170 reduced-GWP	HC	R32, R410a		?	?	Y	Eco-32 REFRIGERANT PRESSURES [PDF] 17
R32	Difluoromethane R 410A replacement in new equipment Not to exist used as a retrofit	HFC	R410A	650	771nineteen	0	Y	R32 REFRIGERANT PRESSURES
R113	Trichlorotrifluoroethane Banned-1996 Montreal Protocol	CFC			4800	0.8
R114	Dichlorotetrafluoroethane Banned-1996 Montreal Protocol	Chlorofluorocarbon		R124, R142b	3.9	ane.0
R123	Dichlorotrifluoroethane	HCFC	R11		0.02	0.02
R1234YF	Automotive AC 2,3,three,3-Tetrafluoropropene	HFO	R134A		four		Y	R1234YF PRESSURE Nautical chart [PDF] 10
R1234ZW	[citation needed]
R124	Chlorotetrafluoroethane	HCFC	R12, R114		620	002
R125	Pentafluoroethane				3400	0
R134A	Tetrafluoroethane Domestic HVAC, "Freon" CFC Substitute Brusque remaining life Banned every bit of 2024	HFC	R12	1234yf R-152a R-744	1300- 1430	0	North	R134 REFRIGERANT Force per unit area CHART
R143A	Trifluoroethane				4300	0
R152A	Difluoroethane				120	0	Y
R245A	Pentafluoropropane				?	0	N	Combustible under pressure
R290	Pure HC Propane, Intendance® 40	HC	R12, R22, R134A R502 ?		3	?	Y	R290 PRESSURE CHART [PDF] three
R401A	Blend 53% R-22, 34% R-124, 13% R-152a	HCFC	R12, R500?		1100	0.037	Northward
R401B	Blend 61% R-22, 28% R-124, 11% R-152a	HCFC			1200	0.04	Northward
R402A / HP80	Blend of R-22 & R-125 w/ hydrocarbon R-290 (propane) 38% R-22, 60% R-125, 2% R-290	HCFC	R502		2600	0.02	Northward	R402A Force per unit area Chart [PDF] 13
R402B	Blend of R-22 and R-218 west/ R-290 (propane)	HCFC	R502 R-13B1?				N
R403B	Blend of R-22 and R-218 w/ R-290 (propane)	HCFC	R502				N
R404A	Alloy, replaces R502 & R22 Brusk remaining life2 44% R-125, 52% R-143a, R-134a	HFC	R502, R22		3300 3922 ?	0	Northward	R404A Pressure level Nautical chart [PDF] 4 Flammable nether pressure level
R407A	Blend twenty% R-32, xl% R-125, twoscore% R-134a	HFC	R22		2000	0	N
R407C	Alloy 23% R-32, 25% R-125, 52% R-134a	HFC	R22		1600	0	Due north
R407H	Mixture of R32, R125, R134A, non ozone resistant	HFC	R22, R-404A?, R507		1490 1495	-	N	R407H Pressure Chart [PDF] 5 sixteen
R408A / FX10	Blend, Forane®	HCFC	R502		3152	0.024	N	R408A PRESSURE Nautical chart [PDF] xiii
R409A	Blend of R-22, R-142b	HCFC	R12				N
R410A	Domestic HVAC Short remaining life fifty:l blend R32 + R125 Banned as of 2024		R-22	R-32 Eco-32	2088		N	R410A REFRIGERANT Pressure Nautical chart
R414B	Alloy of R-22, R-124, R-142b westward/hydrocarbon R-600a (isobutane)	HCFC	R12 Automotive				North
R448A	Blend R32, R125, R134A, R1234YF, R1234ZW	HFC HFO	R404A or R507		1273		N	R448A / N40 Pressure CHART [PDF] 6
R449A	Blend	HFC HFO	R404A		1282		N	R449A Pressure Nautical chart [PDF] 7
R452A	Blend	HFC HFO	R404A, R507		1945		N	R452A Pressure Chart [PDF] 8
R452B	Alloy alloy R32 + R125+ R1234yf?	HFC HFO	R410A				Y
R454B	Blend	HFO	R410A				Y
R500	Alloy R-12 / R-152a Banned-1996 Montreal Protocol	CFC	R12				N
R502	Freon (Chloropentafluoroethane) Blend 48.eight% R-22, 51.2% R-115 Banned-1996 Montreal Protocol	CFC	R-22 / R115	R404A	4.1	0.283	Northward	R502 PRESSURE Nautical chart [PDF] 12 Becomes flammable under pressure
R507	Blend 50%-50% R-125 & R-143A - or 45% R-125, 55% R-143	HFC	R22, R502		3300	0	Northward	R507 Force per unit area CHART [PDF] 11 Becomes flammable under force per unit area
R600A	Iso-butane		R12, R134		three		Y	R600A Pressure Chart [PDF] 9
R717	Ammonia - NH3 Among oldest refrigerants			R134A-? R32-?	0	0	Y	Flammable at loftier temp.
R718	Water - H20					0	North
R729	Air					0	N
R744	Carbon Dioxide - COtwo GWP REFERENCE GAS				1	0	N

Notes to the table above

1. GWP = Global Warming Potential, relative contribution to global warming past contributing to greenhouse gases that trap heat in the earth'south atmosphere. CO₂ (Carbon dioxide) has a GWP of ane.0.

   Past 2025, high Global Warming Potential (GWP) refrigerants with a GWP of over 750, volition exist banned together along with HVACR equipment that uses that gas. Notation that GWP ratings are controversial.

   ODP = Ozone Depletion Potential - relative damage to the earth's ozone layer.

   ODP is defined as the full amount of ozone destroyed by that substance compared with the corporeality of ozone that would be destroyed by the same mass of CFC-11 = Freon-11 = R-xi.

   Combustible or flammable: refrigerants ar rated every bit
   1 - non combustible,
   2L - very low flammability,
   2 - low flammability,
   3 - high flammability

   - Source:
   ASHRAE: ASHRAE Standard 34 describes a autograph style of naming refrigerants and assigns safety classifications based on toxicity and flammability data
   ASHRAE Standard 15 establishes procedures for operating equipment and systems when using those refrigerants.

2. R404A, commercial employ banned after 2020 is replaced by R448A, R449A, R452A, R407H.
3. R290 PT Nautical chart, A-Gas, Units seven & 8 Gordano Court Serbert Close Portishead, Bristol BS20 7FS United kingdom of great britain and northern ireland, +44 1275 376600 Offices world wide, Website: www.agas.com, retrieved 2020/02/10 original source: https://www.agas.com/media/2422/r290-propane-pt-nautical chart.pdf

   Linde, R290 REFRIGERANT GRADE PROPANE [PDF] Linde AG Linde Gases Sectionalization, Seitnerstrasse 70, 82049 Pullach, Germany Phone +49.89.7446-0, Fax +49.89.7446-1230, www.linde-gas.com/refrigerants, refrigerants@lindegas.com retrieved 2021/12/22 original source: http://hydrocarbons21.com/files/refrigeration_R290.pdf
   Excerpt:

   R290 is the common proper noun for high purity propane (C3H8) suitable for use in the refrigeration and air conditioning industry. It is also known as Intendance® 40.

4. R490 PT Nautical chart, A-Gas, op. cit. retrieved 2020/02/10 original source: https://www.agas.com/media/2405/r404a-pt-chart.pdf
5. R407 Information, Daikin Chemical Europe GmbH Am Wehrhahn 50 40211 Düsseldorf, Germany Phone: +49 211-179225-0 Fax: +49 211-179225-39 daikinchem.de, retrieved 2020/02/10 original source: https://www.daikinchem.de/sites/default/files/pdf/Refrigerants/Daikin_R407H_Handling_Brochure_EN.pdf

   R407H: zeotropic mixture of 32.v weight% R32, 15 % R125, and 52.v% R134a. It is a driblet-In refrigerant for R404A / R507 and a retrofit refrigerant for R22.

6. R448A Information, (N40) Force per unit area & Temperature, FSW op. cit. retrieved 2020/02/10 original source: https://www.fsw.uk.com/sites/www.fsw.uk.com/files/r448a-n40-pt-nautical chart.pdf

   Alternative Chart: R448A Data Honeywell'south Solstice® N40 = R448A [PDF] Honeywell Avant-garde Materials 115 Tabor Road Morris Plains, NJ 07950 honeywell-refrigerants.com retrieved 2020/02/x original source: https://www.fluorineproducts-honeywell.com/refrigerants/wp-content/uploads/2018/02/SPM-FLP-00643-PT-Chart-Solstice-N40_3x5_LR.pdf

7. R449A / XP40 Data, FSW Cannock Delta Business firm,Fairway, Bridgtown, Cannock, Staffordshire, WS11 0DJ Email Sales@fsw.u.k..com Tel: 01543 437 010 retrieved 2020/02/ten original source: https://www.fsw.uk.com/sites/world wide web.fsw.uk.com/files/r449a-xp40-pt-nautical chart.pdf
8. R452 Data, FSW, Op. Cit., retrieved 2020/02/ten original source: https://www.fsw.uk.com/sites/world wide web.fsw.u.k..com/files/r452a-xp44-pt-chart_0.pdf
9. R600A Data, Iso-Butane, A-Gas, op. cit. retrieved 2020/02/ten original source: https://www.agas.com/media/2423/r600a-iso-butane-pt-chart.pdf
10. R600A Data, Iso-Butane, A-Gas, op. cit. retrieved 2020/02/10 original source: https://www.agas.com/media/6742/r1234yf-pt-chart-2.pdf
11. R507 Data, Agas, Op. Cit., https://www.agas.com/media/2421/r507-pt-nautical chart.pdf
    
12. R502 Datra, R502 is replaced by R402A / R-408A, retrieved 2020/02/10 original source: http://www.pchetz.com/_Uploads/dbsAttachedFiles/R502PressureEnthalpy.pdf
13. R402A Data, REFRIGERANT CHANGEOVER GUIDELINES R-502 TO R-402A/R-408A [PDF] (2005) Copeland / Emerson Climate Technologies, 1675 W. Campbell Road Sidney, OH 45365-0669 (937) 498-3011 copeland-corp.com

    Excerpts: Copeland does not advocate the wholesale changeover of CFC refrigerants to HCFCs or HFCs. If a system is non leaking refrigerant to the atmosphere, and is operating properly, there is no technical reason to replace the CFC refrigerant.

    In fact, changing the refrigerant may void the U.L. listing of the unit. Nonetheless, once the decision has been made to make the alter from R-502 to the acting R-402A or R-408A, the following guidelines are recommended.

    R-402A/R-408A should be used but in systems that currently use R-502. Information technology should not be mixed with R-502 or any other refrigerant nor should it be used to replace CFC-12 or HCFC-22

14. R408A Data, see #13 to a higher place.
15. Daikin, R407H PROPERTIES, USE & Handling [PDF] Daikin Chemical Europe GmbH Am Wehrhahn 50 40211 Düsseldorf, Federal republic of germany Phone: +49 211-179225-0 Fax: +49 211-179225-39 daikinchem.de
    Excerpt:
    R407H can be used as a Drop-In refrigerant in R404A / R507 systems. A Driblet-In is the easiest way to convert a refrigeration system to some other refrigerant. It is linked with minor changes and it usually uses the same oil type.
16. Eco Freeze, Due east.F. International bvba Boombekelaan 11E B-2660 Hoboken (Antwerp) Belgium + 32 498 648 933 – Arya Mohadjerin arya@eco-freeze.com source of our Eco-32 force per unit area chart given in the table above, retrieved 2021/12/22 original source: https://eco-freeze.com/resources/#32chart
17. Engineering Toolbox, "Refrigerants - Environmental Properties, Refrigerants - Ozone Depletion (ODP) and Global Warming Potential (GWP)", retrieved 2021/12/22 original source: https://www.engineeringtoolbox.com/Refrigerants-Surround-Properties-d_1220.html
    This article provided data for some of the gas properties entered in the table above.
18. The GWP of R32 was increased from 675 to 771 in Baronial, 2021 by the Intergovernmental Panel on Climatic change (IPCC), sixth assessment written report "Climatic change 2021 – The Physical Science Basis."
19. US EPA UNACCEPTABLE SUBSTITUTE REFRIGERANTS [PDF] U.S. EPA, retrieved 2021/12/22 original source: https://www.epa.gov/snap/unacceptable-substitute-refrigerants

Comparison of Ambient Pressure/Temperature for Refrigerants

Notes to the table higher up

• These are vapour pressures unless stated otherwise
• [6] Alternative Chart for R448A (N40) Pressure & Temperature, FSW op. cit. retrieved 2020/02/10 original source: https://www.fsw.uk.com/sites/www.fsw.united kingdom.com/files/r448a-n40-pt-chart.pdf

Definition of Air Conditioner Loftier Side and Low Side Pressures

First let'south explain "low-side" and "high-side" air conditioner compressor motor pressures and what they hateful.

Ac service manuals and grooming refer to:

• Depression-side air conditioner compressor motor pressure:

  This is the pressure in the air conditioner'southward refrigerant suction line (low side pressure during compressor operation) and this will be a relatively low number, often less than 100 psi.

  During performance, refrigerant is returning to the compressor from the cooling (evaporator) coil in this line. If we continued the suction line directly to a sealed vacuum test judge we'd actually observe that the compressor could pull an actual vacuum on the line.

  We used to use an old Frigidaire™ rotary-design compressor motor as our vacuum pump when we needed to become the air out of a refrigeration system prior to charging it with new refrigerant.

  The low-side of an ac system is always located inside of the space to be cooled, or inside of an air handler which moves air through the space to be cooled.

  By lowering the force per unit area in the cooling coil located on the "low side" of the air conditioning system, the compressor permits liquid refrigerant to be discharged into the cooling coil where the change of refrigerant state from a liquid to a gas absorbs oestrus and brings the cooling scroll to the proper operating temperature.

  The LOW SIDE of a refrigeration system is the low-pressure and low temperature half of the organisation. Unremarkably this is the indoor air handler - located inside the space that is to be cooled by bringing indoor air to operating temperature. (For a refrigerator this is typically 38 to 45 °F.)

• High-side air conditioner compressor force per unit area:

  Output (loftier side pressure during functioning) is the pressure of the compressed refrigerant gas every bit it leaves the compressor motor. In other words, refrigerant gas returns to the compressor through the suction line from the cooling coil (which is cooling building air).

  The low-pressure refrigerant gas is compressed to a loftier-pressure refrigerant gas inside the compressor motor. This high temperature refrigerant gas is then cooled down to condense into a refrigerant liquid before information technology is returned indoors to the air handler and evaporator coil to be used to cool building air. (Thus we get the name "condensing curlicue" and "condensing unit" or "condenser" for the outside half of an air conditioning system.)

  The high side components of an ac system, such as the compressor, condensing coil, and fan unit of measurement used to cool the condensing gyre are located outside of the conditioned or refrigerated space, and will exist immersed in air at ambient outdoor temperature, say 72 °F.

  Here is where the magic of air-conditioning occurs. As long as the compressor can produce a temperature in the outdoor condensing coil which is above ambient outdoor air temperature, oestrus will flow from the condensing whorl into outdoor air (for example outdoor air diddled across the condensing coil past a fan).

  If you studied thermodynamics in high schoolhouse yous learned that heat always flows from the warmer to the cooler material. The effect is to transfer heat gathered in the indoor or conditioned infinite into outdoor air.

  The Loftier SIDE of a refrigeration system is at high temperature and higher (refrigerant) pressure and will ever be to a higher place ambient temperature. Then in a cooling arrangement it will exist located outside in order to transfer oestrus to the outdoor air. A heat pump designed to pump estrus into a building will, of course, reverse these roles when in heating mode.

Refrigerant Pressure / Temperature Chart & Tabular array Downloads

• R22 REFRIGERANT Pressure / TEMPERATURE CHARTS [Web Artilcle] Troubleshooting, repairing, + R22 chart downloads.
• REFRIGERANT Pressure / TEMPERATURE CHARTS for R-22, R-410A, R-134A, R-404A REFRIGERANTS [PDF] Advantage Applied science, Inc. 525 Eastward Finish xviii Road Greenwood, IN 46142USA, Tel: 317-887-0729 Spider web site: world wide web.AdvantageEngineering.com Electronic mail: sales@AdvantageEngineering.com
  
  HCFC-142b REFRIGERANT GAS Product Information [PDF] Op. Cit.,
• R32 REFRIGERANT PRESSURES [Spider web Article] includes downloadable PDFs of R-32 pressure/temperature charts
• R32 Pressure / TEMPERATURE CHART [PDF] Agas, Op. Cit., retrieved 2020/02/10 original source: https://www.agas.com/media/2427/r32-pt-chart.pdf
• R134 REFRIGERANT PRESSURE / TEMPERATURE CHARTS [Web Article] + additional data on & downloads for R-134
• HFC R-134A Force per unit area TEMPERATURE CHART [PDF], Pacific Sea Breeze Marine Products, 100 Grace Fashion, Scotts Valley, CA 95066 USA, Tel: 831-600-7878 Website: http://pacificseabreeze.com/technical_library
• R134A REFRIGERANT PT Chart [PDF] Agas, Op, Cit. retrieved 2020/02/10 original source: agas.com/media/2404/r134a-pt-chart.pdf
• R410A REFRIGERANT PRESSURE / TEMPERATURE CHARTS [Web Commodity] Troubleshooting, repairing, + R-410a refrigerant pressure level chart downloads.
  
• REFRIGERANT TEMPERATURE / Force per unit area CHARTS for R-407, R-22, R410a, R-407c, R-134a, R404a, [PDF], Op. Cit.,
• REFRIGERANT Pressure / TEMPERATURE CHARTS for R-11, R-113, R-123, R-12, R-thirteen, R-134A, R-114, R-14 or Freon-fourteen, Tetrafluoromethane,R-22, R-23, R-410A, R-409A, R-416A, R-500, R-503, R-507, R-503 [PDF]

  Airgas Refrigerants, Inc., Headquarter Function 2530 Sever Road, Suite 300 Lawrenceville, GA 30043 Tel: 1-800-473-3766, Website: world wide web.airgasrefrigerants.com E-mail: ARF-Contact.u.s.@airgas.com

• HCFC-142b REFRIGERANT GAS Product Information [PDF], DAIKIN AMERICA, INC. 20 Olympic Drive, Orangeburg, NY 10962, USA Phone: +1-845-365-9500 Toll-Costless: +one-800-365-9570 Facsimile: +ane-845-365-9598 http://www.daikin-america.com,

  DAIKIN CHEMICAL EUROPE GmbH Immermannstr. 65D, 40210 Dusseldorf, Germany Telephone: +49-211-179225-0 Facsimile: +49-211-1640732 http://www.daikinchem.de

  Chemicals Segmentation Umeda Center Bldg., 2-four-12, Nakazaki-Nishi, Kita-ku, Osaka 530-8323, Japan Telephone: +81-vi-6373-4342 Facsimile: +81-vi-6373-4390 http://www.daikin.com/chm

• HCFC R-142b REFRIGERANT GAS MSDS [PDF], National Refrigerants, Inc., 661 Kenyon Ave., Bridgeton NJ 08302, U.s.

Typical HVAC Refrigerant Pressures

Typical residential air-conditioning refrigerant pressures vary depending on the model, compressor motor size and design, and the refrigerant used.

The pattern pressures may be provided on labels attached to the equipment simply the bodily air conditioner operating pressure will vary in part as a role of the incoming air temperatures.

"Charging Charts" (such as the commercial unit charging chart shown here) are provided in service manuals to determine the target suction vacuum (negative) force per unit area and output pressure level for a given compressor motor.

Use of the charging chart for the specific compressor is the correct way to service information technology. The following example pressures are based on "rules of pollex" that become you in the correct "ballpark" if no charging chart is at hand.

Instance of bodily air conditioner compressor loftier side output pressure level:

Using R-22 refrigerant and assuming an outside air temperature of 85 °F called for 120 °F inside the compressor (add 35 °F to incoming air temperature) and an output high-side compressor pressure of about 260 psi.

Example of actual air conditioner low side input or suction line pressure level during functioning:

Depression-side pressure during normal operation of the same compressor model and refrigerant and the aforementioned outdoor air temperature of 85 °F called for 45 °F temperature entering the compressor (subtract 40 °F from incoming air temperature) which on the service chart indicates that the incoming or suction line pressure would exist nigh 75 psi.

Case of a more theoretical air conditioner or heat pump pressure level and temperature at the compressor and at the cap tube or thermostatic expansion valve:

During normal performance: at an outdoor temperature of 72 °F, liquid refrigerant (R12 for example) leaving the outdoor condensing whorl and entering the cap tube or TEV might be at 100 psi and 95 °F.

These numbers vary by changes in ambience temperature, compressor model, and refrigerant gas used.

On the low side of the TEV or cap tube (in the cooling coil in the air handler) where the liquid refrigerant is changing state to a gas, it may exist cooled downwardly to 10 °F. and by the time the refrigerant leaves the cooling curlicue (evaporator coil) and gets back to the compressor motor information technology volition be all vapor and may be at simply 15 psi. [R12 refrigerant changes from liquid to vapor at fourteen.6 psi at 10 °F.]

Air Conditioner or Oestrus Pump Refrigerant Equalization Pressure level - System-OFF refrigerant pressures

When you measure oestrus pump or cooling system pressures makes as much deviation as where you lot mensurate it. When an air workout or heat pump arrangement has turned off and been off for some time (30 minutes or more) pressures equalize throughout the organization between the loftier and low sides.

At that signal the refrigerant pressure in both the high side and low side of the air conditioner or heat pump system volition be in accordance with the ambient air temperature and the backdrop of the particular refrigerant gas present.

The static or equalized system refrigerant force per unit area will exist defined by the refrigerant gas type (which defines its boiling signal and pressure at diverse temperatures).

For example with that beautiful old R12 refrigerant, equally long as there is just virtually any refrigerant in the system - enough so that there is some liquid refrigerant, i.e. information technology'southward not all just gas) then in equalized status at 70 psi ambience temperature the refrigerant pressure will be seventy psi.

With a temperature correction chart you tin can read the static or equalized refrigerant force per unit area for any refrigerant gas and the actual ambient temperature.

Reminder: this refrigerant gas behavior ways that if y'all use pressure level test gauges to measure the refrigerant pressure in the static or equalized air conditioning or heat pump system, the gauges but tell you the refrigerant pressure, not the quantity of refrigerant that is present in the organisation.

Run into Gauge, REFRIGERATION PRESSURE TEST

Correcting Refrigerant Pressure level & Leaks

If after review of the to a higher place article, y'all have adamant that yous accept a refrigerant pressure level trouble or a refrigerant leak, there are procedures to address those issues. These corrections will include getting the right refrigerant charge by whatsoever of several means (weight or volume measurements or some techs monitor refrigerant line temperature).

It besides means finding and fixing the refrigerant leak if the problem was simply lost refrigerant.

For assistance with these corrections, encounter:

• REFRIGERANT CHARGING Process
• REFRIGERANT DRIERS & FILTERS
• REFRIGERANT LEAK DETECTION
• REFRIGERANT LEAK REPAIR

Refrigerant Blazon & Environmental Concerns Update

Analogy, excerpted from TRANSITIONING TO Depression-GWP ALTERNATIVES in Residential & Calorie-free Commercial Air Workout [PDF] (live link given only beneath), U.South. EPA, accounts for an estimated 36.7 metric tons of CO₂ equivalent released into the atmosphere by residential and light commercial A/C equipment in 2014.

At COMPARISON of REFRIGERANT GAS PROPERTIES nosotros explained the two about widely-used measures of environmental impact of refrigerant gases, GWP and ODP, and that tabular array makes clear that at that place are significant differences in both Global Warming Potential and Ozone Depletion Potential amid refrigerants.

More almost environmental concerns amid refrigerants and the motion towards refrigerants that offering less contribution to global warming and its costs is in the following manufactures:

• CLIMATE FRIENDLY ALTERNATIVES to HFC REFRIGERANTS - EU [PDF] European Committee for Climate Activeness, (This department leads the European Commission's efforts to fight climate change at Eu and international level.)
  EuropeanCommission, Charlemagne building, Rue de la Loi 170, 1040 Brussels Belgium (Visitors Eye), Web: https://ec.europa.european union/info/index_en - retrieved 2021/12/22, original source: https://ec.europa.eu/clima/eu-activeness/fluorinated-greenhouse-gases/climate-friendly-alternatives-hfcs_en).
• TRANSITIONING TO LOW-GWP ALTERNATIVES in Residential & Low-cal Commercial Air conditioning [PDF] (2015) US Environmental Protection Bureau (EPA), SNAP (Significant New Alternatives Policy), Contact: https://www.epa.gov/aboutepa/forms/contact-epa, Web: www.epa.gov, retrieved 2021/12/22, original source: https://www.epa.gov/sites/default/files/2015-09/documents/epa_hfc_residential_light_commercial_ac.pdf
  
• TRANSITIONING TO LOW-GWP ALTERNATIVES in Domestic Refrigeration [PDF] (2016) U.Due south. EPA (SNAP, retrieved 2021/12/22, original source: https://www.epa.gov/sites/default/files/2016-12/documents/transitioning_to_low-gwp_alternatives_in_domestic_refrigeration.pdf
• TRANSITIONING TO LOW-GWP ALTERNATIVES in Commercial Refrigeration [PDF] (2016) U.S. EPA, (SNAP), retrieved 2021/12/22, original source: https://world wide web.epa.gov/sites/default/files/2016-12/documents/transitioning_to_low-gwp_alternatives_in_commercial_refrigeration.pdf
• TRANSITIONING TO LOW-GWP ALTERNATIVES in Motorcoach Air Conditioners [PDF] (2015) U.South. EPA, (SNAP), retrieved 2021/12/22, original source: https://www.epa.gov/sites/default/files/2015-09/documents/epa_hfc_passenger_vehicle_ac.pdf
• One thousand-J Thomas Mechanical, "HFC Refrigerants and Climate Change" [web commodity], Yard-J Thomas Mechanical, 6175 Trevarton Dr. Longmont, CO 80503 United states [Not Open up to Walk-in Traffic] Tel: 303-435-8141 - retrieved 021/12/21 original source: https://www.kjtmechanical.com/webapp/p/574/hfc-refrigerants-and-climate-change
  Excerpts:

  ... the Paris Climate Accord, reached in December 2015 "gentleman'southward understanding" [goal] is to reduce greenhouse gas emissions to 0 by 2050 and concur the increase in global temperature to i.v degrees Celsius.
  ...
  President Obama pledged that the U.s. would reduce greenhouse gas emissions approximately 25 pct by 2025 using multiple means including ... reducing HFC refrigerants use ...

  In June 2017, President Trump withdrew the United States from the agreement.

  However, every bit of July 2017, 350

  [U.S.] mayors take formed the Climate Mayors and pledged to go on to follow or increment the Paris guidelines. In fact, many of them have committed to the goal of 100% clean energy.
  ...
  The Kigali Amendment on Oct fifteen, 2016 to the Montreal Protocol specifically addresses HFC refrigerants, and stipulates a timeline for limiting production and use. Rich developed countries in the European Spousal relationship and the US volition begin with a 10% reduction (from 2012 baseline) in the utilise and product of HFCs in 2019 down to past 85% past 2036. Developing countries have a more lenient timeline.

  Reduction will avert upwardly to .5 degree Celsius of warming by the end of the century.

  Note that the U.s. has not ratified the Kigali treaty still (and information technology's fate would be uncertain nether the new assistants), just indications are that move will go on in the management of implementing the phasedown, whether legally required or non.

Reader Q&A - as well run into the FAQs series linked-to beneath

R22 REFRIGERANT PRESSURES volition show what pressures are found with R22 refrigerant

What is the working gas pressure for R22 in the aircon

Betimes

You can observe your refrigerant pressure in the commodity and references above, simply y'all'll run into yous have to name the specific refrigerant gas and the ambient temperature.

How many suction gas pressure in 11 tr ac

Reader Question: what is the force per unit area in an A/C or estrus pump organization when the compressor is off?

How-do-you-do, I always wondered, auto or firm A/C, if it is off, compressor off, is there any pressure in the organization? Or does the compressor cause and make the pressure? Thanks, J.Thou [email 26 Sept 2015]

I would assume less pressure in system when compressor is off and then when on? Thanks, John Kelly. PS: Just had new condenser / compressor unit put in my house and when running, see modest baste on lower line seems to exist diluted oil. Possibly just condensation mixed with oil that got on while repairing. It don't seem to get that minor drop when I don't run information technology. Its on the bottom of that weld spot.

Reply:

Admittedly there is force per unit area in the air conditioning or heat pump arrangement when the compressor is not running.

When the compressor shuts off the high side pressure is high - say 200 and the low side low - say 20 (these are just conceptual equally actual pressure depends on the compressor, ambient temperature, refrigerant type).

Then when the motor stays off for a time - say 1/ii 60 minutes more than or less - *normally* pressure level in the whole system equalizes to a lower number which would exist the pressure that the item refrigerant would sit down at for the current ambient temperature (at sea level).

E.g. R22 at lxxx °F will stabilize at 143.seven psi in the organization while R410 would exist at 235.9 psi.

Watch out: about that OIL Drip: is bad if it's really leaking. There is oil in the refrigeration system (to lube the compressor); if there is oil leaking out at a fitting on the refrigerant line then there is most likely also an actual refrigerant leak.

If you clean the joint - wipe it clean of oil and condensation - you should not see more oil there. Condensate yeah.

Question: refrigerant force per unit area differences in an inverter-blazon air conditioner arrangement?

2016/08/29 Y.W. asked [ by private email to editor ]

Hi, firstly I desire to thank you for creating such a helpful site - keep it up!

I merely have a few questions regarding inverter A/Cs - In a split-type home air conditioner which use an inverter compressor, does this result the PSI needed on either the loftier or depression side of the organization?

If so how do I know what it is supposed to exist? Is the method for adding refrigerant different for inverters than a standard arrangement? and is there a way to know at any point in time if the compressor is running at total speed or only partly?
Thank you

Reply:

The psi you'd expect to see in any HVACR system is a role of:

one. the specific refrigerant used

2. the ambient temperature

three. the compressor having reached steady country or run long enough that the low side and high side pressures are existence controlled by the refrigerant metering device such equally the TEV

For any specific refrigerant you'll observe a chart that gives the human relationship of refrigerant pressures to temperature - as the tech has to consider that when charging the system.

The data tag and specs for a given compressor model and brand will also often give the standard working pressure range.

For other readers, an "inverter" in an air conditioning system is a variable speed control that changes the pumping speed of the Air conditioning compressor motor in response to the temperature in the conditioned infinite.

By varying the compressor speed we vary the rate at which refrigerant is dispensed into the cooling system. In my OPINION this is a sophistication of an air conditioning design that relies only on the refrigerant metering device (TEV or cap tube) to manipulate refrigerant into the cooling system.

Inverter designs exercise not only rely on varying the compressor motor speed.

Motor on/off cycling, configurations that bypass refrigerant hot gas output from the loftier-side over to the low side or suction side of the arrangement, mechanically operated refrigerant command valves, and other approaches let for an inverter type air conditioner or oestrus pump design.

The purpose of an inverter blazon air conditioner system is to match the compressor's output to variations in the cooling load on the organisation, presumably producing a more than efficient cooling system.

These systems may as well be described as VRF or variable refrigerant period designs.

I've researched this question further but not yet constitute specifications indicating that the refrigerant operating pressures are unlike with an inverter or VRF air conditioning or heat pump blueprint. I have found warnings that lower refrigerant velocity can outcome in lubrication issues in the compressor and a reduced compressor life.

Heatcraft warns:

Compressor Operating Limits:

Compressors should non exist operated outside of the operating limits shown on the published compressor specification sheets, and low pressure controls should not be ready below the minimum settings without prior written approval of the Copeland Awarding Engineering Section.

Operating below the commanded minimum suction pressure may upshot in excessive belch temperatures which can crusade cylinder and valve impairment, and may result in lubrication bug. Since loftier discharge temperatures tin occur even though the motor is cool, the motor thermostat will not protect the compressor against these weather condition.

Operation of motor-compressors beyond the established recommended operating limits will exist considered misuse and abuse, and damage may result.

- source: Heatcraft, "Why and How nosotros Utilise Chapters Control " [PDF], Heatcraft Refrigeration Products – Due north America, 2175 West Park Place Blvd. Stone Mountain, GA 30087
U.s. of America Tel: (770) 465-5600 Toll-Free: (800)-321-1881 hrpd.feedback@heatcraftrpd.com retrieved 2016/08/29, original source: world wide web.heatcraftrpd.com/res/pdfs/faqs/Capacity_Control.pdf
This visitor has offices globe broad.

More than Notes Almost Residential Air Conditioner Compressor Pressures

Put some other way, high temperature or high pressure on the air conditioner low side is a sign of a problem. That is, every bit pressure on the high side goes way up, low side pressure will increase also, and we may exceed the operating temperature of the arrangement.

The Depression side temperature must exist low enough to go transfer of estrus from the indoor air into the evaporator curlicue. The Loftier Side temperature must be high enough to get transfer of heat into the outdoor air.

• Meet SEER RATINGS & OTHER DEFINITIONS for additional definitions of the high side and low side of an air conditioning system.
• Run across COMPRESSOR CONDENSER for an explanation of how and why high side and low side pressures in the cooling system enable an air conditioner to motion heat from indoors to outdoors.
• See OPERATING TEMPERATURES HVAC for a discussion of the typical temperatures at which diverse types of cooling systems operate.

If your air workout or oestrus pump system has lost its cooling chapters or won't starting time see REPAIR GUIDE for AIR CONDITIONERS.

...

Continue reading at REFRIGERANT PRESSURE DIAGNOSIS or select a topic from the closely-related articles beneath, or run across the complete Article INDEX.

Or see REFRIGERANT Pressure level READING & Chart FAQs - questions & answers posted originally at this page.

Or come across these

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• DEFINITION of SPECIFIC HEAT
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