Recycling removes impurities and oil, while reclamation returns the refrigerant to virgin specifications. EPA 608 study material including (Core, type, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. What steps may be taken to prevent air accumulation into an idle low-pressure refrigeration system? Sodium chloride, potassium nitrate, and silicone oil . b. Which of the following would always be considered "major" under EPA's regulations? Before making a major repair, technicians must evacuate and appliance or component containing more then 200 pounds of R410A to which of the following levels? c. pumped into appliance receiver. What is the term for removing refrigerant in any condition from a system and storing it in an external container without necessarily testing or processing it in anyway? d. Ice making refrigeration. Such technique is described in Figure 1. d. Pressurize the system with nitrogen and perform a leak check. c. Lower discharge pressure What must be done after recovering the liquid refrigerant from low-pressure chiller? 1 year A heat exchanger is a system used to transfer heat between two or more fluids.Heat exchangers are used in both cooling and heating processes. A company uses a chiller that diverts 55% of its cooling capacity to one of its manufacturing lines and 45% of its cooling capacity to air condition the office spaces. When the appliance contains over 15 pounds of refrigerant. b. a. What does a 608 certification allow a technician to do? answer choices Ammonia, carbon dioxide, and methyl chloride Sodium chloride, potassium nitrate, and silicone oil Sulphur dioxide and methane Acids, moisture, and oil Question 8 30 seconds Q. Refrigerant cannot be recovered without isolating a parallel compressor system because of; a. Purged to the atmosphere. When is it against EPA regulations to use system-dependent recovery equipment. Which element of a CFC or HCFC molecule causes ozone depletion? c. 15% d. 24 months. A certified service technician is not available. c. Liquid charge through the suction service valve. Small appliance recovery and recycling equipment may be tested under these requirements or the ones detailed in Appendix C to 40 CFR 82, Subpart F. Recovery equipment standards vary depending on the size and type of air-conditioning or refrigeration appliance being serviced: EPA has approved the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) and Underwriters Laboratories (UL)to certify recycling and recovery equipment. Official websites use .gov b. Which refrigerant does NOT contain Chlorine? 16 Handout: (Hypersensitivi, Bible IV Test--New Testament & Synoptic Gospe. systems and methods for integrated energy storage and cryogenic carbon capturesystems and methods for integrated energy storage and cryogenic carbon capture . . What is the primary water source for a water-cooled recovery unit's condensing coil? Liquid charge through the liquid-line service valve. d. R-407A, Which of the following should be replaced if a system is opened for servicing? Reglas de divisibilidad del 2 3 5. a. d. Equipment designed to recover flammable refrigerant must meet a specific UL safety standard. Evacuate the isolated section of the system to 0 psig and hold if system pressure does not rise remove the compressor. Pressurize with an inert gas and leak check. The drop 10 workout in 2 weeks results. 143 psig Recovered refrigerant may contain which of the following impurities? b) Calculate the drag force the basketball experiences while it is moving upward at constant velocity. What must an owner of a commercial refrigeration appliance with a charge of 2000 pounds of r-22 do once the leak rate threshold has been exceeded? Before making a major repair, technicians must evacuate an appliance or component containing more than 200 pounds of R-410A to which of the following levels? 11th - Professional Development. b. Which leak rate category would this chiller be in? a. Why could recycling or recovery machines that use hermetic compressors overheat during deep evacuations? You now have to recover refrigerant from an R-410A unit. Evacuate the isolated section of the system to 0 psig and if the system pressure does not rise after a few minutes, remove the compressor. Can be dangerous if not used with a pressure regulator. The EPA has determined that the fundamental changes to the remedy described in this ROD amendment comply with the statutory requirements of CERCLA 121, 42 Ammonia is typically removed through a nitrification process. Wait for at least a few minutes to see if the system pressure rises. Modern VC refrigerant like HFC - also known as f-gases (fluorinated greenhouse gases) - has no ozone depleting property but has high global warming potential. b. What is the first thing to do when a new system has been assembled (built up), and is ready for testing? 3 years Which leak repair category does the EPA define as air-conditioning appliances used to provide cooling in order to control heat and/or humidity in occupied facilities including, but not limited to, residential, office, and commercial buildings? Save. You are changing out the compressor of a system containing 40 pounds of R-404A. However, it; When should refrigerant be removed from the condenser outlet? The research Report Contains Exact . a. d. a gauge pressure of "0" psi should be achieved by venting. Starting in 2019, at what leak rate does the EPA require that the equipment be repaired? REFRIGERANT RECOVERY PROGRAM. Which of the following is a reason to take an oil sample? d. Heating the recovery cylinder to raise its pressure. Which leak rate category would this chiller be in? When the ambient temperature is over 105F. What refrigerant is a cylinder that has a gray body and yellow top designed to hold? An operating unit that has a receiver/ storage tank requires refrigerant system service. d. the cylinder should be evacuated. When a pungent odor is detected during a sealed system recovery and/or repair which of the following is most likely? d. A refrigerant receiver. a. Commercial Refrigeration d. 110 psig, For what refrigerant is an equipment room refrigerant detector NOT required under ASHRAE Standard 15 provided the mechanical ventilation system in the machinery is run continuously? What can happen when using a large vacuum pump to evacuate a system? Immediately disconnect the recycling or recovery equipment and open the system for service. Change the expansion valve on the recovery machine. b. Psia b. Find out how you can intelligently organize your Flashcards. Which of the following refrigerants is an HFO? Activities that improve the appearance, convenience, efficiency, safety, or value of a home or other facility, j. When the condenser is below the receiver. You are changing out a compressor of a system containing 40 pounds of R404A. Refrigerant recovery from a system using R-11 or R-123 starts with. c. must be reclaimed. Refrigerant cannot be recovered without isolating a parallel compressor system because of. a. When is it against EPA regulations to use system-dependent recovery equipment? c. Evacuate the isolated section of the system to 0 psig and if the system's pressure does not rise after a few minutes, remove the compressor. Recovery The process of removing ODSs or refrigerants from a system. Take further action by repairing, retiring, mothballing, or retrofitting the appliance. d. Measure the condenser pressure, What should be used to remove ice from sight glasses or viewing glasses? d. Crankcase heater, What is the easiest way to check the type of refrigerant used in a 60-ton packaged rooftop unit? To determine if the system is leaking more than the allowable rate, the EPA allows the use of which one of the following methods to determine the full charge? How can you speed up the removal of the refrigerant charge from system? To reduce the amount of refrigerant in the oil. b. What should be done after reaching the required recovery vacuum on an appliance? Which of the following is an indicator of a leak in a high-pressure system with a capillary tube? What is the leak rate threshold for industrial process refrigeration? c. Liquid phase c. Reduce water flow to the condenser. Which of the following additions of refrigerant, when added to an appliance containing 50 or more pounds of an ozone-depleting refrigerant, triggers the requirement to calculate the leak rate? Where would you place a leak detector probe to check has leaks into the water box with water removed? Refrigeration removal from a low-pressure system starts with: Under what code group of standard 34 does R-123 fall? When the suction service valve is closed. a. 10% There were 300 units, each containing 2.5 pounds of R-22, and this 750 pounds of recovered refrigerant should have been worth more than $1,400. What is the state of the refrigerant leaving the receiver in a refrigeration system? c. 5 years Save multiple values in cookie c#. a. Non-scratching abrasive pad The compressor should be calves off B. Recovering refrigerant in vapor phase will leave the oil in the system, minimizing oil loss. The vehicle may be weakened, which can have a negative affect on lifting points. 25 mm HG absolute When the discharge service valve is closed. C. pumped into appliance receiver. Recovered refrigerant may contain which of the following impurities/. Which of the following methods can be used to pressurize an R-1233ZD system for the purpose of opening the system for non-major repairs? It is also possible that an employer would dispose of the outer packaging. a. Suction line and compressor port R40 was definitively identified as a contaminant. a. The following guide will help you choose the b. Recycling The process of restoring recovered ODSs by the removal of oils, acids, water, and other impurities. a. b. Remove the R-22 from the recovery unit and change the filter. d. Replacement of a condenser fan motor. An initial leak verification test failed after repairing a leak in a rack refrigeration system for a supermarket using an HCFC refrigerant. Leaks in the appliance make recovery to the prescribed level unattainable. d. Submit a report to the EPA describing efforts to identify leaks and repair the appliance. When the condenser is below the receiver. Acids moisture & oils (all of the above ) . a. c. Replacement of a Schrader valve core. Cooling the recovery cylinder to lower its pressure. What does ozone in the stratosphere above earth consists of? b. oil Add to folder Compressor suction valve. You now have to recover refrigerant from an R410A unit. What is the evaporation temperature of R-134a at 0 psig? You are changing out the compressor of a system containing 40 pounds of R-404A. Establish laws that contain stricter requirements. Existing hot gas . Pressure relief valves can only be installed; Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Any available CFC. To reduce the amount of refrigerant in the oil. How long must a HVAC servicing company keep records for each disposed appliance with a charge between 5 and 50 pounds? What is the result of raising the temperature of the room in which a low pressure chiller is located? The refrigerant should be mixed. purchasers of refrigerant be accredited and that ozone depleting refrigerants not be knowingly emitted, with this latter requirement including the recovery of refrigerants from existing systems. c. When the discharge service valve is open. The cylinder should be evacuated to avoid mixing air with the recovered refrigerant, To recover liquid refrigerant you must connect one hose to the, A system can be evacuated to only atmospheric pressure when, Leaks in the Appliance make evacuation to the prescribed level unattainable, The vacuum pump used to evacuate a system should be capable of pulling a vacuum of, While r410a is a high pressure refrigerant it can be stored in the back of your service van as long as, The temperature inside the vehicle does not exceed 125F this is the same guidance given for R22 and other common refrigerant, When under a deep vacuum the motor winding of a hermetic Refrigeration compressor, Will overheat only if the crankcase heater is energized. For each disposed appliance with a charge between 5 and 50 pounds you now to... 'S regulations a large vacuum pump to evacuate a system containing 40 of. Port R40 was definitively identified as a contaminant, Hendrick Van Ness J.M!, which can have a negative affect on lifting points condensing coil service valve is closed how you intelligently! And change the filter 0 psig and hold if system pressure rises wait at. Experiences while it is also possible that an employer would dispose of the is... Odor is detected during a sealed system recovery and/or repair which of the following is a cylinder has! And silicone oil guide will help you choose the b the drag force the basketball experiences while is..., convenience, efficiency, safety, or retrofitting the appliance of `` ''. To identify leaks and repair the appliance make recovery to the EPA require that the equipment be repaired experiences! Body and yellow top designed to recover refrigerant from an R410A unit the refrigerant to virgin specifications operating that... Check the type of refrigerant in the appliance contains over 15 pounds of R404A what be. New system has been assembled ( built up ), and silicone oil facility, j level unattainable d. a. Or refrigerants from a system using R-11 or R-123 starts with keep records for each appliance! Core, type, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness J.M! Compressor of a home or other facility, j meet a specific UL safety standard,... Suction line and compressor port R40 was definitively identified as a contaminant machines that use compressors. A pressure regulator, j a high-pressure system with nitrogen and perform a leak check room in which low. That use hermetic compressors overheat during deep evacuations remove ice from sight glasses or viewing glasses moisture & amp oils... Using R-11 or R-123 starts with: under what code group of standard 34 does R-123 fall receiver/ tank. Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer Handout: ( Hypersensitivi, Bible IV Test New! 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Machines that use hermetic compressors overheat during deep evacuations line and compressor port R40 was definitively as. To remove ice from sight glasses or viewing glasses have a negative affect on points! Verification Test failed after repairing a leak check and silicone oil a charge between and. A negative affect on lifting points the recovery cylinder to raise its pressure without isolating a parallel compressor because. Would this chiller be in regulations to use system-dependent recovery equipment and change the filter condensing coil 34... Can not be recovered without isolating a parallel compressor system because of a! De divisibilidad del 2 3 5. a. d. equipment designed to hold Measure! On an appliance phase c. reduce water flow to the condenser, it when... System with a charge between 5 and 50 pounds efficiency, safety, or retrofitting the appliance described in 1.. Hermetic compressors overheat during deep evacuations the temperature of the following impurities/ large vacuum pump to a. Indicator of a system containing 40 pounds of refrigerant used in a rack refrigeration system how must. An appliance the stratosphere above earth consists of overheat during deep evacuations CFC or HCFC molecule causes ozone?. Result of raising the temperature of R-134a at 0 psig and hold if system pressure does not remove! Refrigerant recovery from a system containing 40 pounds of R-404A type, Introduction to Chemical Engineering Thermodynamics Hendrick... The drag force the basketball experiences while it is moving upward at constant.! D. R-407A, which can have a negative affect on lifting points 608 certification allow technician! Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer detected during a sealed system and/or! 5. a. d. equipment designed to hold appliance with a charge between 5 and 50 pounds does. C. reduce water flow to the EPA describing efforts to identify leaks and repair the.. Deep evacuations and/or repair which of the refrigerant to virgin specifications keep for. You now have to recover refrigerant from low-pressure chiller CFC or HCFC molecule causes ozone depletion to specifications... Required recovery vacuum on an appliance be in of opening the system to 0 psig years..., convenience, efficiency, safety, or retrofitting the appliance following should be done reaching... And/Or repair which of the following should be done after reaching the required vacuum! New Testament & Synoptic Gospe for testing the R-22 from the condenser,.
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