R407c Refrigerant Suction Pressure Discharge Pressure









This Guide covers R-22, R-407C, R-410A, and R-134a used in commercial air conditioning Suction Discharge Liquid Refrigerant Pressure Drop Pressure Drop Pressure Drop °F (°C) PSI (kPa) °F (°C) PSI (kPa) °F (°C) PSI (kPa) Note Suction and discharge pressure drops based on 100 equivalent feet (30. Temperature chart for R-410A, R-407C, R-22, R-404A, R-134A refrigerants. 5 TR capacity for the experimental performance analysis with HCFC-22 and R-290 in the. The unit is designed for operating pressures of 150 PSIG on the suction side. Energy efficiency is comparable to R22. is pleased to announce new, A. Original Hitachi R407c Scroll Refrigeration Compressor G303DH-47D2 G403DH-64D2 G503DH-80D2 G503DH-83D2 G603DH-90D2 G603DH-95D2, US $ 50 - 200 / Unit, Hotels, Manufacturing Plant, Restaurant, Construction works , Energy & Mining, Guangdong, China, Hita chi. Lower Because of its higher vapor capacity, the discharge temperature of R-410a is _____ than R-22. These are currently the three most widely used refrigerants on the market today for HVAC applications in residential and commercial use. High Pressure Shut-Off 30 bar (450 psig) Refrigerants* R134a, R12, R22, R502, R404a, R402a, R401a, R407c, R409a Single or multiple refrigerant use Single Multiple Single Multiple Single Multiple The AR2700, AR2700J, AR2700E does not contain a pump down valve and is meant for single refrigerant operation. 0 Use for refrigeration system that the suction pressure is below atmospheric pressure. Pressure drop should not cause: • vapour formation in line • insufficient liquid pressure at DX device. Viscosity of Mixed Refrigerants R404A, R407C, R410A, and R507A. Make a note of the pipe temperature and pressure. This is the maximum allowable pressure drop for the entire. Also fits 1986. The compressor discharge gas goes directly into the liquid line because by-pass solenoid valve (5) is open when discharge solenoid (1) is closed. and a high pressure ( discharge ) of about 280 psi, which is about 55 deg celcius, cooling cycle. The control requires manual reset once it is tripped. 2# suction, not 80. Equation (1) is also. When the DBV is applied, as shown in Figure 2, where there is an appreciable pressure drop between the valve outlet and the compressor suction, the externally equalized valve must be used. High performance. Abnormal discharge pipe temperature: F6: Refrigerant overcharged: H3: Failure of high pressure switch: H4: Actuation of low pressure switch: H7 Abnormal outdoor fan motor signal: H9: Malfunction of thermistor (R1T) for outdoor air: J2: Current sensor malfunction: J3 Malfunction of discharge pipe thermistor: J5 Malfunction of thermistor (R3T. What is the suction pressure of 407c are suction head and discharge head. Turn on the gauge. As we can see in the Ph diagram below. That calculates to 0 K superheat and 1 K subcooling. H-series Scroll compressors are designed to operate for a maximum of 150 hours. 00 88715-36153 Toyota Tube, Discharge, J 8871536153, New Genuine Oem Part. It is a zeotropic blend of difluoromethane (R-32), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-134a). R134 REFRIGERANT PRESSURES. When the control closes the suction valve, it also closes the discharge valve to prevent the refrigerant to backflow into the bypass line, and, at the same time, the control opens the bypass valve. How To Use Hvac Gauges. If the liquid pressure rises significantly, but the suction pressure remains low, the liquid circuit has a restriction. 525 East Stop 18 Road Greenwood, IN 46142 317-887-0729 fax: 317-881-1277 web site: www. increased suction superheat. refrigerant entering the compressor. • Reset pressure controls for R407F. Also the low pressure (suction line) is not sweating as much as the compressor. 4°C) saturated. The normal time for full refrigerant charge pressure stabilization on the suction or inlet was 11 seconds at 2. It may also be due to the formation office on the. The resulting high discharge/low suction pressure condition will result in more liquid refrigerant in the accumulator. 8 Liquid Lines Pressure drop not as critical as in vapour lines. Constant Pressure Regulator (CPR) valve regulates refrigerant to the compressor. The entire refrigerant is now held between the discharge valves of the compressor and the liquid line solenoid valve. 385 bar for 1 TR system and 2. I remember it by thinking that superheat is the low pressure so you use the low number on the chart. Models are available with multiple seat configurations, high pressure settings, and certified for use with R410a refrigerant. SUBJECT: TEMPERATURE - PRESSURE CHART FOR FYI #289 9/17/2009 R-22, R-410A, R-407C, R-134A & R-404A REFRIGERANTS ADVANTAGE Engineering, Inc. refrigerant circulating system of a heat pump, as pressure increases, temperature also increases. Also evaluated as sub for R502. • Note: If charging into the suction line on a running system the. Minimum Suction Pressure In Reciprocating Compressor - posted in Industrial Professionals: Friends,I want to know if theres any thumb rule or conservative method for estimating the minimum suction pressure a reciprocating compressor can be subjected to. Besides R407C, R410A is also considered a long-term replacement refrigerant for R22. When the seal line reaches the discharge end, the refrigerant in the tooth space is. What must. Many servicemen experience service calls where the compressor has both a low head pressure and a high suction pressure. Float Suction/Discharge Pressure Supermarket Refrigeration Systems. This script determines the gas pressure based on temperature of R410a refrigerant. These authors also tested the window air conditioner of 1. 8°C respectively. Prevent the ingress of air at all costs! The compressors are factory-filled with the following oil type: - for R134a, R404A/R507, R407C FUCHS Reniso Triton SE 55 - for R22 FUCHS Reniso SP 46. KP pressure switches are available in IP 30 and IP 44. This may require adjusting the high pressure safety controls to operate as intended. • • Crankcase Pressure Regulating valve • •Compressor capacity control (cylinder •unloading on 4D-6D-6F compressors or TMModuload on 3D compressor) • Discharge line check valve. In the mechanical control, the total pressure from the pump (less the suction pressure) is the actual net oil pressure. R-407C exhibits higher pressures than R-22 at normal condensing temperatures. Supplementary cooling or reduced suction gas temperature (Δtoh<20K) Compressor operation is possible within the limits shown on the diagrams of application. R-407C is a mixture of hydrofluorocarbons used as a refrigerant. Air in the system may also cause over charging indication. EXAMPLE If you were using 1,000 pounds of R-22, you'll need about 955 pounds of 407C, as follows: Pounds of 407C = 1,000 x 70. 77 pounds of refrigerant. Factory mounted on base using spring isolators. The 2CP has many options, consult the factory to customize a 2CP to meet your application’s needs. This can cause chemical reactions, a pressure rise in the condenser and an elevated compressed-gas temperature. If the inlet pressure is decreased to 10 barg, then the operating point of the second-stage compressor runs far right to the curve, which is unacceptable. 3L yt This Four Seasons A/C Refrigerant Discharge Suction Hose fits your 1991 Oldsmobile. Beginning of Discharge. Pressure drop in the suction line adversely affects unit capacity and efficiency. supco rpt61 pt chart master digital refrigerant pressure temperature chart. Price $245. Could this be from being overcharged w/ freon and the relief protection is paying off to the suction (low pressure line) The discharge pressure is at 245 and suction is 70. If the system is undercharged, both pressures will begin to rise. 3) R43T Suction pipe thermistor Detect accumulator outlet temperature and protect compressor. true suction pressure around 60 - 70 psig. These are commonly installed in the suction line ahead of the compressor to limit the inlet pressure to the compressor. I get 63 psig suction and 252 psig high side. For air conditioning system, R22 pressure in discharge is250psi and suction in67psi. R-407C Pressure Chart. Effect of Discharge Pressure. The discharge pressure is designed to run at 300 PSI. 407C can serve as a replacement for HCFC-22 in pos­ dition (i. 5 K total 20 K/SC inside condenser 2 K. com email: [email protected] Adding charge will decrease the superheat and recovering refrigerant will increase the superheat. 94 lb/min (5. Discharge pressure too high. The suction pressure drops and the compressor unloads. Pressure doesn't mean anything without knowing what refrigerant is. Attach a waste hose or vent hose to the center of the manifold set up. Hot Gas Bypass: Basically, this is a regulator in a refrigeration system which bypasses hot gas entering the the condenser into the the suction line or the evaporator inlet, to prevent the compressor suction pressure from falling below a desired setting. When the valve opens, hot discharge gas is routed back into the area of the motor protector to cause a trip. Recovery capabilities Compressor Weight Refrigerant compatibility Features RecoverX #95700 RecoverXLT #95763/95766/95768 RecoverXLT #95765 740-95. We refrigeration pressure temperature chart superheat. That’s generally what he’s saying. Refrigerant Standing,Suction & Discharge Pressure- R-600a,R-22,R-134a, R-32,R-407c,R-410 Online Touch. Whether the application calls for measuring chiller pressure, supermarket refrigeration, refrigerant suction and discharge, or hydronic system pressure and steam recovery, Kavlico sensors have been designed to perform. Chapter_06 - CHAPTER 6 1 An open air refrigeration system carries a load of 35 kW with a suction pressure of 103 kPa and a discharge pressure of 690 kPa Chapter_06 - CHAPTER 6 1 An open air refrigeration system. 42 m 3 /min). 02 11 Application Guidelines. capacities based on line friction pressure drop per 100 feet (30m) of equivalent pipe length which corresponds to a 1°f (. Many servicemen experience service calls where the compressor has both a low head pressure and a high suction pressure. Replace drier 5. Replace expansion valve 6. Hp requirements, discharge temp, and compressor capacity are all a function of compression ratios. ) Best results are obtained when the pipe is free of oxides or other foreign material. Since the high-pressure side delivers the refrigerant that makes the cool air, this signals that there is a problem. Viscosity of Mixed Refrigerants R404A, R407C, R410A, and R507A. Refrigerant gas pressure most popular gas use standing running pressure how much learn this video - Duration: 9:43. Suction Pressure 35 PSIG 50 PSIG Suction Temperature 30 F160 Discharge Pressure 200 PSIG 295 PSIG Discharge Temperature 880F 1150F II. Tighten belt 3. Lexus Lx570 Rear Ac Evaporator Front Discharge And Suction Pipe Tube 2008-2020 Oem $185. : dew point temperature at suction pressure t 2d: dew point temperature at discharge pressure t 1m: mid-point temperature at suction pressure t 2m: mid-point temperature at discharge pressure t 1e: refrigerant temperature inlet at the evaporator Example mid-point: R407C // -10/45/SH after evap. The discharge pressure is designed to run at 300 PSI. Absolute discharge pressure = gauge reading + 15 psi Absolute suction pressure = gauge reading + 15 psi A compression ratio of 8 to 1 is expressed as 8:1, this means the discharge pressure is 8 times the suction pressure. Malfunction of Transmission Between Indoor Units. When all non-condensables have been removed, the pressure (saturation temperature) will correspond to the water temperature provided that liquid refrigerant is present. Example: A pressure of250 psig is measured at the condenser outlet. If the liquid and suction pressure are low, and no obvious sweating or frosting of the liquid line is present, add refrigerant. Remove loading valve protector cap ’B’. Carefully open the service valve, allowing the non-condensables to discharge to atmosphere. Standing pressure ( system not running ) will depend on surrounding temperature of outdoor unit. 407C can serve as a replacement for HCFC-22 in pos­ dition (i. WHAT IS THE COMPRESSION RATIO OF THIS UNIT?. Subject: Forane 407C Pressure Temperature Chart Keywords: Forane 407C, R-407C, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gas Created Date: 10/4/2012 11:25:07 AM. OPERATING PRESSURE POINTS. 02 11 Application Guidelines. 3-4 Expansion: In this process a throttling device is used to reduce the pressure of the refrigerant from the discharge pressure (point3) to the suction pressure (point4). 1, are viable options. The suction pressure, along with the suction temperature and the wet bulb temperature of the discharge air are used to determine the correct refrigerant charge in a. In addition, it is an alternative to R134a. Pressure drop in the suction line adversely affects unit capacity and efficiency. high pressure, the refrigerant gas can change from a gas to a liquid at higher temperatures, releasing latent energy. Failure to have sufficient head pressure will result in low suction pressure and/or. If a correctly sized suction riser causes excessive pressure drop at full load,. 77 dgr C, discharge pressure 13. Pump the refrigerant into the condenser coil by running the compressor with the liquid service valve closed. Pounds of new refrigerant = Pounds of original refrigerant x density of new refrigerant (at 80°F) density of original refrigerant (at 80° F). A property which needs consideration with R407C is the temperature glide, which makes careful definition of temperatures necessary. (Note that in most cases, equipment designed for R-22 cannot. The refrigerant is in the liquid state now, and at a high pressure and temperature. Maximum suction line lift 60 Ft. ing refrigerant is 40°F. Prevent the ingress of air at all costs! The compressors are factory-filled with the following oil type: - for R134a, R404A/R507, R407C FUCHS Reniso Triton SE 55 - for R22 FUCHS Reniso SP 46. Tighten belt 3. #8 Your recovery/recycling machine has R-22 refrigerant in it. Starting at the discharge connection of the compressor, line 1 conveys a high pressure superheated hot gas where it enters a heat exchanger (the condenser). This can cause chemical reactions, a pressure rise in the condenser and an elevated compressed-gas temperature. (11) noted that the discharge pressure of R407C was higher by 1. I recovered the refrigerant, changed the filter drier, charged about 2lbs before starting the compressor and the low side shot right up to 170. I have a 3Ton Carrier Heat Pump unit using 410A that has extremely high suction pressure around 250PSI. 1 kpa) r-507: 3. vessel, correct installation practices, and how to adjust flow rates etc. The PT Chart typically lists the pressure on the left, and the corresponding refrigerant boiling point on the right. Gases, R409A, R11, R407C, R448A, R401A, R22, R450A, R23, R417C, R449A, R422B, R404A, R408A, R500, R508B, R290, Pentane, R401B, R12, R402A, R507, R134a, R123, R124. R-407C Pressure Chart. Link to Pressure vs. Difluoromethane serves to provide the heat capacity, pentafluoroethane decreases flammability, tetrafluoroethane reduces pressure. 2018 Chevrolet Silverado 2500 HD. Function R407C PLUS Series Heat Recovery System Page 46 Suction thermistor 3 (Hx. In a simple system with a fixed orfice expansion device for example, an overcharge will increase suction and head pressure. Refrigerant R22 has approximately 55% higher refrigerating capacity and pressure levels than R12**. Outside air vents open. Many suction line filter-driers have a pressure tap on the inlet end so the pressure on the inlet of the drier can be compared to the pressure at the suction service valve at the compressor. Secondary Coolant Solenoid Valve. 407a pt chart r22 suction pressure temperature chart r22 refrigerant pressure temperature calculator 407c superheat chart how to read a pt chart r407c refrigerant suction pressure discharge pressure r407c refrigerant ideal pressure 407c pt chart and bubble point. High efficiency refrigerant compressor of new generation. Malfunction of Transmission Between Indoor Units. condensing at a higher temperature & pressure. All the warm liquid refrigerant in the liquid line flows through the evaporator. Take a reading of your refrigerant system pressure (PSIG). 3 kg/min) n/a. Short remaining life 2. R407C is a ternary mixture refrigerant composed of R32/R125/R134a (23/25/52 wt%). The capacity of a compressor can be affected by a refrigeration system's ever-changing pressures. The Discharge Pressure is the result of compressing the low side vapours. 00 88715-36153 Toyota Tube, Discharge, J 8871536153, New Genuine Oem Part. https://www. The pressures alone are meaningless because by definition they change with the condensing and evaporating temperatures. These calls are tough to handle because the compressor is. This may require adjusting the high pressure safety controls to operate as intended. If the liquid and suction pressure are low, and no obvious sweating or frosting of the liquid line is present, add refrigerant. atequilibrium(continuous operation) must be achieved. https://www. The compressor discharge gas goes directly into the liquid line because by-pass solenoid valve (5) is open when discharge solenoid (1) is closed. Rhodia Organique Fine Ltd. 8°C respectively. Pressure gauges, permanently installed to monitor compressor suction and discharge pressures, are convenient when maintaining the system. These calls are tough to handle because the compressor is. • A helix tube in tube water-cooled condenser is standard with refrigerant counter. Subject: Forane 407C Pressure Temperature Chart Keywords: Forane 407C, R-407C, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gas Created Date: 10/4/2012 11:25:07 AM. Pressure Relief Valves Pressure relief valves are designed and engineered to provide high-volume discharge primarily for use on liquid receiver applications above the liquid refrigerant level. It takes refrigerant in vapour form from a low pressure level (low-pressure suction side) to a high level (high-pressure discharge side). The valves are “back-pressure dependent” and are therefore required to discharge to atmosphere. Relative Charge Size Genetron Refrigerant HCFC-22 100% 407C / 422D 4% - 5% less. NU-22 - 120° condensing / 40° evaporator approx. The discharge connection plug should be removed first before pulling the suction connection plug to allow the dry air pressure inside the compressor to escape. is pleased to announce new, A. R407C R134a R404A Working pressure range high side bar (g) 7. a) Refrigerant comes into the compressor as a low- pressure gas, it is compressed and then moves out of the compressor as a. So 32'f or 0'C for your refrigerant. Refrigerant Pressure Gauge Ada dua jenis pressure gauge, yaitu: 1. that the discharge pressure of R407C was ratio as well as a smaller non-evaporated quantity of the refrigerant at the compressor suction. to keep Freonâ„¢ 407C on hand to ensure that you are prepared to. Recovery capabilities Compressor Weight Refrigerant compatibility Features RecoverX #95700 RecoverXLT #95763/95766/95768 RecoverXLT #95765 740-95. Author links open is related to the pressure drop across the suction and discharge valves. All mechanical and electronic products included in this brochure are compatible with refrigerants including: R717, R22, R134a, R404A/507, R407C, among others. Loosen safety nut ’D’ three full turns. Danfoss scroll compressor for air conditioning SZ240A4PBI, 52. Calculated results per one condenser coil and one evaporator coil for the air conditioner operating on. Another important consideration when sizing suction lines is refrigerant gas velocity in a suction riser. Could this be from being overcharged w/ freon and the relief protection is paying off to the suction (low pressure line) The discharge pressure is at 245 and suction is 70. Cut in pressure is set an equivalent coil temperature of 35F, that is between 60 and 61 psig, (refer to the chart I attached) Start cut out temperature at 20 psig, run the system until the box is at 35F, the raise the suction pressure cut out until the unit goes off. High pressure above max operation range of the pressure switch. permissible ambient temperature: 100°C- Max. measuring the operating conditions (including discharge and suction pressures, suction line temperature, com - pressor amps, superheat) instead of using the liquid line sight glass as a guide. low voltage gas valves. For all operating conditions, the discharge pressure of R-407C is varied in the range 11-13% higher than R22. #8 Your recovery/recycling machine has R-22 refrigerant in it. Check the receiver tank for refrigerant level. Capacity 80kW~800kW Evaporate Temperature -15℃ ~ 20℃ Refrigerant R134a,. 5 tons 036 = 3 tons 042 = 3. It opens at 2. Condenser entering temp: 86-88 deg. 5 ton unit. Of course, this is only a factor when the outdoor unit is above. That calculates to 0 K superheat and 1 K subcooling. Pressure, activation of the flux regulator, as shown here, feels the pressure drop and draws station piston in the given point. Maximum Allowable Pressure (PS) ZR 18 to ZR 81: Low side PS 20bar / High Side PS 29. R-407C is one of the many replacement products for the now phased out R-22. liquid and suction lines covering total linear = 200 ft. definite purpose contactors. suction accumulators available in standard sizes and volumes, to make your transition to R410A as seamless as possible. Internal Pressure Relief (IPR) Valve. The discharge pressure is affected by several factors: size and speed of the condenser fan, condition and cleanliness of the condenser coil, and the size of the discharge line. 407C is lower in the range of 8. 525 East Stop 18 Road Greenwood, IN 46142 317-887-0729 fax: 317-881-1277 web site: www. ¶ 115V control circuit transformer standard for all models. Low refrigerant charge. pressures will very based upon manufacturer, wet-bulb temperatures, indoor airflow, coil cleanliness. Starting at the discharge connection of the compressor, line 1 conveys a high pressure superheated hot gas where it enters a heat exchanger (the condenser). Change in Discharge Pressure, psi (kPa) 17 (117) 17 (117) *Chemours calculations **Assumes 110°F (43. refrigerants that are already used thousands of times in many mo-bile and stationary applications. Technicians with R-22 experience will need to become familiar with working with high and low side pressures that are much higher when using R-410A. https://www. R-407C is a mixture of hydrofluorocarbons used as a refrigerant. Author links open is related to the pressure drop across the suction and discharge valves. But different refrigerants and different systems have different requirements, making it difficult to specify a particular pressure reading. Only pump the system down to 0 PSIG suction pressure. On smaller systems the suction and discharge pressures will be the same, however on larger equipment the maximum allowable suction pressure will be lower and the system will need to be tested in several sections. For instance, what are the typical high and low side pressures on a properly charged system for: R-22 on a 1 ton R-22 on a 1. Use of refrigerants other than R-22, R-407C, or R-134a. The suction regulator may be any of the following: suction solenoid valve, Evaporator Pressure Regulator (EPR), or Electric Evaporator Pressure Regulator (EEPR). If this is so always evaporating above zero, 4 or 5 deg celcius, R407c will have a low pressure (suction ) of about 50 psi. AdvantageEngineering. • Encapsulated, automatic reset, high pressure control, and an adjustable low pressure control with flexible refrigerant hose to reduce possibility for leaks. EXAMPLE If you were using 1,000 pounds of R-22, you’ll need about 955 pounds of 407C, as follows: Pounds of 407C = 1,000 x 70. Light 1 2 3 Prefilter Drain 1 2 3 Prefilter Pressure Drop 1 2 3 Afterfilter Pressure Drop 1 2 3 On a monthly basis, dirt and dust should be cleaned form the air-cooled refrigeration condensing. This entry was posted in replacements and essential properties and tagged banned refrigerants, boiling point, classification of refrigerants, condensing pressure, critical temperature, dielectric strength, Green Refrigerant, HCFC, hvac refrigerant types, latent heat, List of refrigerants, Ozone Layer, properties of r22 refrigerant, r-401b. Refrigerant Properties and System Effects, Reference R22. Let’s say, the recommended superheat was 18 degrees, you would add/remove refrigerant to the system until the actual temperature of the suction line was 18 degrees above the indicated saturation temperature from your low-pressure gauge. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air-conditioning of buildings and automobiles. R407C PLUS; Daikin R407C PLUS Manuals Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor. This corresponds to a condensing temperature of approx. 6 = 70,600 = 955 73. 00) than for either R22 (2. A/C PRESSURE SENSOR (Triple function) When the refrigerant is below 196 kPa (2. High compression ratios are a major reason systems run hot. If the discharge valves are good, you need to shut off the disconnect or hope the high pressure switch (if the unit has one) shuts the unit off. Genetron ® 407C may be used to replace HCFC-22 in existing. BASICS OF OPERATION AND APPLICATION OF OIL FLOODED ROTARY SCREW COMPRESSORS 149 ) Figure 6. At temperatures above saturation, the refrigerant becomes super-heated vapor. 234 psig head / 60 psig suction. 385 bar for 1 TR system and 2. Pressure relief valves are designed and engineered to provide high-volume discharge primarily for use on liquid receiver applications above the liquid refrigerant level. 3°C) condensing temperature Charging a Unit with Freon™ 407C As with any other refrigerant blend, when charging equipment with Freon™ 407C, remove liquid refrigerant from the cylinder to charge the unit. Gauge pressures given in the table assume an atmospheric pressure of 14. In boiler feed pumps usually the discharge pressure is 20 to 30 times tie suction Pressure so to protect the pump balancing line is given from discharge to suction. R-407C is a mixture of hydrofluorocarbons used as a refrigerant. Pressure Regulating Valves. a) Refrigerant comes into the compressor as a low- pressure gas, it is compressed and then moves out of the compressor as a. line voltage. 33 lb) the room size should be such that a sudden loss of refrigerant shall not raise the mean concentration in the room above the practical limit 0. a) Refrigerant comes into the compressor as a low- pressure gas, it is compressed and then moves out of the compressor as a high- pressure gas. If the discharge valves are good, you need to shut off the disconnect or hope the high pressure switch (if the unit has one) shuts the unit off. On smaller systems the suction and discharge pressures will be the same, however on larger equipment the maximum allowable suction pressure will be lower and the system will need to be tested in several sections. A/C Compressor Reed Valves. The pressures alone are meaningless because by definition they change with the condensing and evaporating temperatures. 7 Working pressure range low side bar (g) 1. used with HCFCs (R22) or the appropriate HFC refrigerant such as R404A, R407C or R134a. Low Pressure switch. These calls are tough to handle because the compressor is. The compressor discharge pressure and temperature of a R-410A system will be_____than a R-22 system. Only pump the system down to 0 PSIG suction pressure. Refrigeration capacity: 80 kW - 800 kW. partially blocked. To use the HVAC Technical Support AC Pressure Temperature Chart, Turn unit on; monitor system running approximately 15 to 30 minutes. *The recip systems, either air-conditioning or refrigeration are more efficient with R-134a refrigerant as compared to R-22. • Constant Pressure Regulator (CPR) valve regulates refrigerant to the compressor. The suction pressure and discharge pressure of compressor were assumed as the evaporation pressure and condensation pressure of the system respectively. Supplementary cooling or reduced suction gas temperature (Δtoh<20K) Compressor operation is possible within the limits shown on the diagrams of application. Suction Pressure 35 PSIG 50 PSIG Suction Temperature 30 F160 Discharge Pressure 200 PSIG 295 PSIG Discharge Temperature 880F 1150F II. day but your low side pressure should be around 70 psi. Climate Control Systems ServiceAutomotive–Heating&AirConditioning R-407c Standing Pressure – ‫التوقف‬ ‫حالة‬ ‫الضغط‬ Low Suction Pressure – ‫المنخفض‬ ‫السحب‬ ‫ضغط‬ High Discharge Pressure – ‫المرتفع‬ ‫الدفع‬ ‫ضغط‬ 180 Psi 75 Psi 0 Psi 83. and leaving temp: 101 deg. Function R407C PLUS Series Heat Recovery System Page 46 Suction thermistor 3 (Hx. The mass flow rate of refrigerant in compressor m k , in kg/m 3 , depended on the working capacity of compressor V k , in m 3 , the capacity efficiency of compressor η ck , and the specific. The major difference of R-407C is that it has a temperature glide about 6°C (1 0. STARTTING RELAY BURNS OUT 1. My questions are:. Genetron ® 407C can serve as a replacement for HCFC-22 in pos­ itive displacement chillers without flooded heat-exchangers. Refrigerant Lines Suction Line = Line Between the Evaporator and the Compressor. The low-pressure gauge should read between 25 and 40 psi (pounds per square inch). refrigerant to enter the evaporator will cause a flooded coil similar to an overcharge. 210845 March 2019. Velocity of at least 1000 feet per minute is required to carry oil up a suction riser. Rhodia Organique Fine Ltd. If you are going to discharge a unit, or if you are going to vent freon by attaching the unit, you will need to attach the larger black low pressure hose to the center port of the manifold. The pressures alone are meaningless because by definition they change with the condensing and evaporating temperatures. Link to Pressure vs. iKNOW Thornliebank Industrial Estate Nitshill Rd Glasgow G46 8JW. To determine subcooling, use the bubble pressure column. 5°C-30°C-33. Pressure Regulating Valves. The discharge connection plug should be removed first before pulling the suction connection plug to allow the dry air pressure inside the compressor to escape. Clean condenser. The copper-coated steel suction tube should be cleaned before brazing. , on the suction and discharge sides of the compres­ sor). Suction Pressure (psi) Discharge Pressure (psi) Discharge Temperature (°F) Opteon™ XP40 (R-449A). But for R410A pressure will be more higher that R22. R-407C is one of the many replacement products for the now phased out R-22. 6%, discharge pressures of R-407C are higher in the range of 11-13% and it is also observed that the pressure drops of R-407C are always lower. Table 5 for a list of discharge line thermostat kit numbers. I get 63 psig suction and 252 psig high side. Discharge temperatures of the compressor operating on R404A, is lower than while using R502, which contributes to increasing of reliability and service life of the compressor. R 22 Capacity 1. Overall refrigeration capacity will. Saturated Condensing Pressure (psig) R-12: 60 degrees F. Continue until desired operating conditions are achieved. Locating the suction side service valve. It may be necessary to reset the pressure cutouts to compensate for the different pressures of the replacement refrigerant. Frozen expansion valve Repair 1. 78 bar, discharge temp 30 dgr C, Liquid 30 dgr C. Usually increasing of discharge pressure compared to that of R22 constitutes 103276kPa; decreasing of discharge. Systems operating on R410A run at a pressure of about 1. There are many variables including: * System design * Outside temperature * Conditioned space temperature That said, for a typical R32 split AC running at 100% of capacity in cooling, I would expect readings in the vicinity of: Suction Temp : 2°C. 407C is lower in the range of 8. com offers 1,642 r407c refrigeration scroll copeland compressor products. Replace drier 5. To determine … REFRIGERANT (SPORLAN CODE). The refrigerant gas can cause frostbite. International Refrigeration and Air Conditioning Conference at Purdue, July 12-15, 2004 where V0 is an effective fixed compressor displacement (i. • • Crankcase Pressure Regulating valve • •Compressor capacity control (cylinder •unloading on 4D-6D-6F compressors or TMModuload on 3D compressor) • Discharge line check valve. Cold ambient temperature. The single most common operational problem in a process plant is loss of suction pressure to a centrifugal pump. Check for holes or open vents 4. These calls are tough to handle because the compressor is. At the end of the discharge process in the screw, no clearance volume remains. 7 Working pressure range low side bar (g) 1. Low pressure shut-off sensor Suction and discharge pressure gauges Upgraded higher suction and discharge pressure gauges Upgraded single higher pressure switch Size L x W x H inches Size L x W x H mm. Don't know what pressure is, I don't have a p. Also evaluated as sub for R502. Moving to the high-pressure side of the refrigerant circuit we address the small amount of discharge line the same way as the suction line except we use the specific volume at 256 degrees, which is. The idea is to start recording the NPSH available, and total head. discharge pressure. The refrigerant gas can cause frostbite. If the liquid pressure rises significantly, but the suction pressure remains low, the liquid circuit has a restriction. n and the expansion is also polytropic but with 35 1. A bad check valve on an air conditioner, heat pump or similar HVACR equipment can show up as abnormally low or abnormally high suction line pressures, or as abnormally low or high superheat. This means that 11 barg is the minimum suction pressure limit. icorinternational. • • Crankcase Pressure Regulating valve • •Compressor capacity control (cylinder •unloading on 4D-6D-6F compressors or TMModuload on 3D compressor) • Discharge line check valve. This may require adjusting the high pressure safety controls to operate as intended. As suction pressure changes, capacity control automatically reduces compressor capacity to as low as 35% of full-design load, reducing horsepower requirements as demand changes. The fluctuations can be from 8 to 12 pounds per squareinch above and below the average pressure in the discharge line. Visually inspect all of the following: expansion valve, thermostat and collector dryer. HIGH SUCTION PRESSURE (See Table 6-1) AND DISCHARGE PRESSURE - Continued Check for indications of defective thermal expansion valve. However, during the upstroke, this same refrigerant may sneak back into the suction line because of the suction valve not seating properly. R-407C is a hydrofluorocarbon (HFC) alternative for R-22 in positive. Zh Series Copeland Scroll Compressors Model Zh21k4e-tfd,R134a/r407c Refrigeration Compressor Copeland Usa , Find Complete Details about Zh Series Copeland Scroll Compressors Model Zh21k4e-tfd,R134a/r407c Refrigeration Compressor Copeland Usa,Zh Series Copeland Scroll Compressor,R134a Refrigeration Compressor,Copeland Compressor Usa from Refrigeration & Heat Exchange Parts Supplier or. Difluoromethane serves to provide the heat capacity, pentafluoroethane decreases flammability, tetrafluoroethane reduces pressure. In a piston type compressor the cyl-. If this is so always evaporating above zero, 4 or 5 deg celcius, R407c will have a low pressure (suction ) of about 50 psi. Forane 407C Pressure Temperature Chart Author: Arkema Inc. • Note: If charging into the suction line on a running system the. Models are available with multiple seat configurations, high pressure settings, and certified for use with R410a refrigerant. The significantly higher discharge gas temperature is also a critical factor compared to R12 (R12/R22 - comparison of discharge gas temperatures of a semi-hermetic compressor) and R502**. Check for holes or open vents 4. ) LINE SIZE - inches MAX. The refrigerant is in the liquid state now, and at a high pressure and temperature. Air in the system may also cause over charging indication. Refrigerant: R-134a, R-407C, or R-410A. Discharge Pressure. an operating pressure-relief device due to pressure in the discharge line. Maximum allowable pressure drops (R407C): Suction line 6 psi. The apparatus of claim 7 wherein the compressor means consists of two or more distinct compressor stages and wherein the first pressure sensing device measures the suction pressure of the working fluid at a point just prior to a first compressor stage inlet and wherein the second pressure sensing device measures the discharge line pressure just. Pounds of new refrigerant = Pounds of original refrigerant x density of new refrigerant (at 80°F) density of original refrigerant (at 80° F). 5 kg: Relief valve: None: Rotational speed at 50Hz [rpm] 0 rpm: Rotational speed at 60Hz [rpm] 3500 rpm: Segment usage: Air conditioning Refrigeration MT: Shipped fittings: Suction and discharge solder sleeves, rotolock nuts and gaskets. Therefore, side load connection for the No. 02 11 Application Guidelines. The mass flow rate of refrigerant in compressor m k , in kg/m 3 , depended on the working capacity of compressor V k , in m 3 , the capacity efficiency of compressor η ck , and the specific. If not, the relief valve opens but the fluid will not be able to flow from the discharge to the suction area. Suction pipe is designed for 5psi of refrigerant pressure drop and additional refrigerant heating by 12. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 7. The high-pressure gas flows in reverse through the lower pressure suction piping and evaporator and eventually exits to the liquid header via check valves around the TEV and liquid line solenoid valve. The suction pressure controller is set to maintain the suction pressure above the low suction pressure shut down setting while the discharge pressure controller limits the station discharge pressure to a value that will not exceed the maximum allowable operating pressure. Danfoss scroll compressor for air conditioning SH300B4ABE, 68. 33 lb) the room size should be such that a sudden loss of refrigerant shall not raise the mean concentration in the room above the practical limit 0. Loosen safety nut ’D’ three full turns. ) Many servicemen experience service calls where the compressor has both a low head pressure and a high suction pressure. If the system is undercharged, both pressures will begin to rise. WHAT IS THE COMPRESSION RATIO OF THIS UNIT?. R-407C is one of the many replacement products for the now phased out R-22. Whenever possible, to avoid fractionation, charging of a refrigeration system incorporating a near-azeotrophic blend should be done with. paulohvac 30,202 views. high-pressure refrigerant vapor from the discharge line directly to the low-pressure side of the system. Horizontal lines are drawn across the refrigerant's pressure enthalpy diagram for the suction and discharge pressures. Refrigerant Standing,Suction & Discharge Pressure- R-600a,R-22,R-134a, R-32,R-407c,R-410 Online Touch. The 2CP series provides proven reliability at a competitive price. If you notice liquid around the clamps and fittings or see evidence of it dripping, you will need to check your high-pressure side. SUBJECT: TEMPERATURE - PRESSURE CHART FOR FYI #289 9/17/2009 R-22, R-410A, R-407C, R-134A & R-404A REFRIGERANTS ADVANTAGE Engineering, Inc. R407C, R407C refrigerant, HFC, 115 lb. Refrigerant Pressure Temperature Chart - PT Chart for R-410A, R-134A and R-22. Calculated results per one condenser coil and one evaporator coil for the air conditioner operating on. Correct answer is C: 35 psig. If this is so always evaporating above zero, 4 or 5 deg celcius, R407c will have a low pressure (suction ) of about 50 psi. discharge and liquid lines, and after TXV. BASICS OF OPERATION AND APPLICATION OF OIL FLOODED ROTARY SCREW COMPRESSORS 149 ) Figure 6. 10:1 is a compression ratio commonly found in refrigeration applications. The temperatures change with coil airflow and indoor and outdoor temperature. Maximum abnormal pressure (fatigue) 833 psi (V1 - V10 only) Minimum burst pressure 2500 psi Maximum operating temperature 250° F Maximum brazing temperature1 250° F Maximum sound level2 50dB Maximum external leakage3 0. Compressor(s) include an integral oil system(s) including oil separator, oil filter, oil sight glass, oil service valve, crankcase heater and POE oil charge n Floating Tube™ coil design. He’s saying the suction pressure is low yeah. From Table 2, we can see that in nominated working condition, the volumetric refrigeration capacity and refrigeration capacity of R32/R125/R161 is 10. The compressor discharge gas goes directly into the liquid line because by-pass solenoid valve (5) is open when discharge solenoid (1) is closed. 2 A-003-R407C- A-003-R407C-3 ODYSSEY - with environmental friendly R407C refrigerant Split System Cooling Only Units Cool You, Cool the Earth A new design of industrial air conditioner with non-ozone depletion refrigerant R407C to provide steady. , a volumetric efficiency ηv is assumed to be unity), Psuc is a compressor suction pressure, and PR is a compression ratio (discharge pressure divided by suction pressure). • • Crankcase Pressure Regulating valve • •Compressor capacity control (cylinder •unloading on 4D-6D-6F compressors or TMModuload on 3D compressor) • Discharge line check valve. Minimum Suction Pressure In Reciprocating Compressor - posted in Industrial Professionals: Friends,I want to know if theres any thumb rule or conservative method for estimating the minimum suction pressure a reciprocating compressor can be subjected to. the present work is to compare refrigerants R407C and R507 with R134a refrigerant using different parameters such as COP Vs Ambient Air Temperature, Refrigeration Note the final pressure at suction and discharge section, temperature at all silent points, final energy meter reading. From accumulators and condensers, to heat pumps and mufflers, we proudly provide a wide range of American-made parts, specializing in custom components – even in small lot sizes. These authors also tested the window air conditioner of 1. During charging of the refrigerant, it is necessary to use the table of pressures and temperatures on the saturation line for R407C, in order to compare suction pressure and boiling temperature at operation on R22 and R407C. Pressure Relief Valves Pressure relief valves are designed and engineered to provide high-volume discharge primarily for use on liquid receiver applications above the liquid refrigerant level. Liquid line 35 psi. air & humidity controls. R22 [%] R22 / to -35°C, tc -10°C CO2 / to -35°C, tc -10°C Compressor displacement counter-proportional to relative cooling capacities. It is a common fallacy of some pump operators to think the installed relief valves protect them under all conditions. The high side is the discharge or head pressure, where high temperature high pressure gas leaves the compressor to flow into the condenser. 5°c) change in saturation temperature. Another important consideration when sizing suction lines is refrigerant gas velocity in a suction riser. Optimized design. Prevent the ingress of air at all costs! 3| Areas of application The compressors are factory-filled with the following oil type: - for R134a, R404A/R507, R407C FUCHS Reniso Triton SE 55. I defrosted all frost from the front and back of coil. And in all cases, hot gas bypass inflates the life-cycle cost of the system: HGBP increases the initial cost. • Reset pressure controls for R407F. So Based on this I would side with Heavy. Refrigerant Machine Operator A CENTRIFUGAL CHILLER HAS A SUCTION PRESSURE OF 18" HG VACUUM AND DISCHARGE PRESSURE OF 6 PSIG. If your Toyota's air conditioning refrigerant recharge kit is equipped with high- and low-pressure gauges, you can use them to help identify when your vehicle's refrigerant level is adequately pressurized. long experience with special compressors for other high pressure. Table 2: R744 standstill and typical system operating pressures To ensure the pressure does not rise to the relief pressure in the event of a power failure or sudden system shutdown, these systems can be fitted with a small auxiliary cooling system. 8 HP/Ton % 100. WHAT IS THE COMPRESSION RATIO OF THIS UNIT?. To ensure the reliable operation of the refrigerant R407C in coun-tries with high ambient temperatures of up to 50°C, Bock compres-sors for R407C are approved for a maximum operating pressure of 35 bar. My questions are:. We refrigeration pressure temperature chart superheat. Let us consider a theoretical vapour compression cycle 1-2'-3'-4' when the discharge pressure increases from Pd to Pd' as shown on p-h diagram. keeping the suction valve closed. 0 kgf/cm2, 28 psi) or above 3,140 kPa (32 kgf/cm2, 455 psi), the A/C pressure switch opens the circuit to the A/C switch and stops the air conditioning to protect the A/C compressor. and a high pressure ( discharge ) of about 280 psi, which is about 55 deg celcius, cooling cycle. Suction, Discharge Pressure & Boiling Temperature List II Hindi - Duration:. The high pressure gauge should read between 225 and 250 psi. Also, the discharge pressures could be 15 to 25 psi higher than R-22. Pressure doesn't mean anything without knowing what refrigerant is. 5 tons 036 = 3 tons 042 = 3. Scroll compressors for refrigeration The compressor is the heart of every compression refrigeration circuit. When the seal line reaches the discharge end, the refrigerant in the tooth space is. During charging of the refrigerant, it is necessary to use the table of pressures and temperatures on the saturation line for R407C, in order to compare suction pressure and boiling temperature at operation on R22 and R407C. As one of the solutions, a design change is deployed to shorten the distance between the compressor suction line and scroll set suction inlet, which results in the superheat reduction by 20-30K. For HFC−410A recommended adding oil to system based on the amount of refrigerant charge in the system. permissible discharge end temperature: 140°C- Max. Eliminates the need for technician to throttle the suction valve; Advanced 1/2 hp, 3425 rpm oil-less compressor with precision valves manufactured in an ISO-9001 facility; Recovers refrigerant and shuts off when unit reaches 13" of vacuum. Price 3867,00 EUR without VAT. Question: If the sight glass refrigerant is not a 100%. Raise WIR for witnessing the Leak Testing for Refrigerant Copper Pipework. , a volumetric efficiency ηv is assumed to be unity), Psuc is a compressor suction pressure, and PR is a compression ratio (discharge pressure divided by suction pressure). Clogged screen or screens in receiver-dehydrator or expansion valve. Typically the charge will be around 95% that of the original R404A charge weight. the present work is to compare refrigerants R407C and R507 with R134a refrigerant using different parameters such as COP Vs Ambient Air Temperature, Refrigeration Note the final pressure at suction and discharge section, temperature at all silent points, final energy meter reading. I defrosted all frost from the front and back of coil. These calls are tough to handle because the compressor is. For example, in a refrigeration unit, the refrigerant R-22 should operate at 75 psi on the suction side. 040 inch (1. Also evaluated as sub for R502. In 2000 International Refrigeration Conferences at Purdue University. Application. Both the suction and the discharge line were cold. Mixrture of R32, R125, R134A, not ozone resistant. Significant savings can be achieved without detrimental effect to the product. definite purpose contactors. Some Refrigerant Standing, Suction, Discharge Pressure & Boiling Temperature List II Hindi S-U-B-S-C-R-I-B-E Don't Forget to Like, Share, Subscribe & press the bell icon [🔔]. (See Figure 3. The higher the. 0 0 100 200 300 400 500 Pressure Difference @ ARI [psi] Volumetric Capacity @ ARI [Ton/cfm] Best Fit R123 R11 R245fa R114 R600a R12 R134a R290 R22 R407C R717 R507 R410A R22 NH 3 R404A/R507 Propane R407C R410A R134a R22 & its near neighbors Comparison of Simple Cycle EER R22 R134a. Efficient crankcase heater design prevents accumulation of liquid refrigerant in the crankcase during shutdown, dilution of the compressor oil supply. This pressure reading will be that of the boiling refrigerant inside the evaporator, assuming no abnormal restrictions exist within the suction line. entering on the suction side. The oil return orifice size should be small to prevent excess liquid refrigerant being returned to the compressor. After leaving the compressor the refrigerant reaches a condenser coil (often on your roof) where it transforms from a gas to a liquid as it releases heat into the. A: A suction accumulator is used to prevent liquid refrigerant flood-back to the compressor. Cut in pressure is set an equivalent coil temperature of 35F, that is between 60 and 61 psig, (refer to the chart I attached) Start cut out temperature at 20 psig, run the system until the box is at 35F, the raise the suction pressure cut out until the unit goes off. These must be firmly seated. on the refrigerant line at the condenser (look for "fluttering" pressure on the suction side). 0 Tons, R 502 Capacity 1. In 2000 International Refrigeration Conferences at Purdue University. The 2CP series provides proven reliability at a competitive price. This entry was posted in replacements and essential properties and tagged banned refrigerants, boiling point, classification of refrigerants, condensing pressure, critical temperature, dielectric strength, Green Refrigerant, HCFC, hvac refrigerant types, latent heat, List of refrigerants, Ozone Layer, properties of r22 refrigerant, r-401b. In a simple system with a fixed orfice expansion device for example, an overcharge will increase suction and head pressure. R407C and R410A. Qualified for R22, R134a*, R407* Multi refrigerant capability. It could also save energy, as the running time of the compressors could be reduced slightly, particularly if converting medium and low temperature systems from R22 to R404A, depending on the type of compressor. 00) than for either R22 (2. Refrigeration is really all about removing heat and sending it elsewhere. If the system is continuing to cool it may be doing so at reduced capacity, observed as a loss of up to ten degrees of temperature drop across the coil. Saturated refrigerant can be 100% vapor, or a mixture of liquid and vapor, or 100% liquid. H-series Scroll compressors are designed to operate for a maximum of 150 hours. HIGH SUCTION PRESSURE (See Table 6-1) AND DISCHARGE PRESSURE - Continued Check for indications of defective thermal expansion valve. Temperature Pressure Chart For R 22 410a 407c 134a And. 5 times the operating pressure. Failure to have sufficient head pressure will result in low suction pressure and/or. • 4–5: Isentropic compression from real cylinder intake conditions (leaks and possible condensation also appear in this part of the process). Uses of Refrigeration Low Pressure Controls. Often, the refrigeration equipment is still running, but the product temperature is suffering about 7 to 10°F. H-series Scroll compressors are designed to operate for a maximum of 150 hours. So, the low side of the system has, 2. • Discharge and suction pressure monitoring. 1 Suction line design max. Systems that use a low pressure controller to maintain space temperature may need to have the cut in and cut out points changed. Does suction pressure in r-134a drop after the refrigerator gets cold? Long story short, 15 year old Samsung french door refrigerator. High suction and low discharge pressures This condition is usually due to a fault within the compressor, such as broken valve reeds or incorrect seating of the valve reeds. If we convert the head and suction pressures to saturated temperatures, the results are a condensing temp of 110F in the outdoor (condenser) coil and a boiling temp of 45F degrees for the liquid refrigerant in the indoor (evaporator) coil, giving us 10F degrees of subcooling, and 10F degrees superheat. 3°C) condensing temperature Charging a Unit with Freon™ 407C As with any other refrigerant blend, when charging equipment with Freon™ 407C, remove liquid refrigerant from the cylinder to charge the unit. epa regulations require that all appliances containing more than 50 lbs of refrigerant (except for commercial and industrial process refrigerant) be repaired when the leak rate exceeds_____% of the charge per year. Shortage of refrigerant. Refrigerant price / availability Leaks Replacement Initial equipment costs R-407C Refrigeration Replacements R-404A R-507A R-407A. A pressure drop of 6 psid in matched commercial Trane RAUC units reduces compressor capacity by 2. DRY AIR - Air which contains no moisture vapor. Answer The suction pressure refers to the pressure of the referigerant being "sucked" back into the compressor. The single most common operational problem in a process plant is loss of suction pressure to a centrifugal pump. pressures will very based upon manufacturer, wet-bulb temperatures, indoor airflow, coil cleanliness. D) higher discharge pressure. Forane® 427A discharge pressure is typically only 0 to 10 psi higher than R-22. instead of 160 Lbs. As the ambient temperature falls the receiver pressure is allowed to fall to a minimum of 75° F. Discharge and Suction Stroke: Reciprocating compressors must have a clearance space between the piston and valve port at top. 525 East Stop 18 Road Greenwood, IN 46142 317-887-0729 fax: 317-881-1277 web site: www. For R-404A Low Temperature 1 psi; for R-404A and R-22 Medium Temperature 2 psi is used. NU-22 - 120° condensing / 40° evaporator approx. Rhodia Organique Fine Ltd. •If the sensing bulb of a TEV is not insulated or properly secured to the suction line, the valve will overfeed. There is no cooling effect on the evaporator. The low-pressure gauge should read between 25 and 40 psi (pounds per square inch). I just punch up the refrigerant I'm working with and it automatically. 0 0 100 200 300 400 500 Pressure Difference @ ARI [psi] Volumetric Capacity @ ARI [Ton/cfm] Best Fit R123 R11 R245fa R114 R600a R12 R134a R290 R22 R407C R717 R507 R410A R22 NH 3 R404A/R507 Propane R407C R410A R134a R22 & its near neighbors Comparison of Simple Cycle EER R22 R134a. no automatic means of suction pressure limiting is utilized on the unit (ex. The advantages of using R-134a over R-22 are with R-134a, as an HFC, having. Discharge Pressure: Higher discharge pressure signifies higher condensing temperature, which is the refrigerant temperature required to reject heat to the condensing medium.

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