c. Retire the appliance until it can be replaced with a new one. What is the best use for testing with soap bubbles? 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. c. Replacement of a Schrader valve core. The METHOD FOR PURIFYING 1,2-DIFLUOROETHYLENE (HFO-1132) patent was assigned a Application Number # 17360678 - by the United States Patent and Trademark Office (USPTO). Purchases of such equipment must be reported to the EPA. c. Recover the refrigerant from the isolated section or component. Where should the discharge from a rupture disc be piped for venting? c. To detect leaks in water tube condensers. Replacement of an evaporator coil. Which of the following is NOT required in order to mothball an appliance using an ozone-depleting refrigerant (thereby extending the leak repair deadline)? Which refrigerant does NOT contain Chlorine? d. Higher discharge pressure, During evacuation with large amounts of moisture it may be necessary to increase pressure to counteract freezing with a gas such as' Which of the following statements about recycling and recovery equipment used for stationary refrigeration is FALSE? systems and methods for integrated energy storage and cryogenic carbon capturesystems and methods for integrated energy storage and cryogenic carbon capture . . Wait for at least a few minutes to see if the system's pressure rises. Sodium chloride, potassium nitrate, and silicone oil . The refrigerant should be chilled. c. R-410A What is meant by the term "high efficiency purge unit". Heat exchangers are used in both cooling and heating processes. Which of the following repairs would always be considered "major" under EPA's regulations? A company uses a chiller that diverts 55% of it cooling capacity to one of its manufacturing lines and 45% of its cooling capacity to air condition the office spaces. b. d. Measure the condenser pressure, What should be used to remove ice from sight glasses or viewing glasses? 25 mm HG absolute Recovered refrigerant may contain which of the following impurities? The outer packages are designed to remain in place from shipment to disposal, so it is possible and intended that the refrigerant supplied in DOT-39 cylinders spend the entire life-cycle inside the fiberboard outer packaging. you now have to recover refrigerant from an R-410a unit. Purchases of such equipment must be reported to the EPA. c. Water 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. d. The valve seats can freeze. c. High pressure liquid What does ozone in the stratosphere above earth consists of? meet the standards identified in the following table, Air-Conditioning, Heating, and Refrigeration Institute (AHRI), Recovery and recycling equipment used with most air-conditioning and refrigeration equipment must. Please click here to see any active alerts. c. Every 6 months c. 90 psig What can happen when using a large vacuum pump to evacuate a system? What is the result of raising the temperature of the room in which a low-pressure chiller is located? The recovered refrigerant may have contained impurities of acids, moisture, and oil. b) Calculate the drag force the basketball experiences while it is moving upward at constant velocity. b. b. What is the state of the refrigerant leaving the receiver in a refrigeration system? After a leak repair of a supermarket rack using 3000 lbs. When a refrigerant Trace gas becomes absolutely necessary which of the available refrigerant should be used to identify a leak? d. horizontally. What does a 608 certification allow a technician to do? Modern VC refrigerant like HFC - also known as f-gases (fluorinated greenhouse gases) - has no ozone depleting property but has high global warming potential. a. b. oil c. A low pressure control. Share sensitive information only on official, secure websites. 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. Ask the owner. Which of the following statements about recycling and recovery equipment is FALSE? c. 5 years Identify the best method to charge a system that has both an air-cooled condenser and evaporator with a nameplate charge of 80 pounds. When should refrigerant be removed from the condenser unit? In addition to isolating the compressor, which of the following procedures should you follow? Purchases of such equipment must be reported to the EPA. 16 Handout: (Hypersensitivi, Bible IV Test--New Testament & Synoptic Gospe. c. 15% b. in parallel. Wait for at least a few minutes to see if the system pressure rises. When could a reciprocating compressor be damaged if energized? If you are looking for a product that can help make your life simple, you have come to the right place. b. When the discharge service valve is closed. Purchase of such equipment must be reported to the EPA. b. Can be dangerous if not used with a pressure regulator. Which of the following is a reason to take an oil sample? Refrigerant cannot be recovered without isolating a parallel compressor system because of: Which of the following refrigerants would be used in a low-pressure appliance? When should an appliance NOT be evacuated all the way to the prescribed level? EPA regulations (40 CFR Part 82, Subpart F) under Section 608 of the Clean Air Act require that refrigerant recovery and recycling equipment be tested to ensure it meets EPA requirements.For most recovery and recycling equipment, these requirements are detailed in Appendix B2 to 40 CFR 82, Subpart F. Requirements for equipment manufactured or imported after January 1, 2017, are detailed in . b. a. NATE Industry Competency Exam: Oil Furnaces, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Engineering Mechanics: Statics, Practice Problems Workbook, K Chapters: Shrimad Rjchandra, Virchand R. G. Which repair would always be considered major under EPA's regulations? Refrigerant cannot be recovered without isolating a parallel compressor system because of. When can appliances containing refrigerants be recovered to atmospheric pressure? Establish laws that contain stricter requirements. Recovered refrigerant may contain which impurities. The recovered refrigerant may have contained impurities of acids, moisture, and oil. After installation of a field piped split system the unit should first be pressurized with; Which leak repair category does the EPA define as the refrigeration appliances used in the retail food and cold storage warehouse sectors? b. a. if your equipment is recovery only, refrigerant that is removed from vehicles should be poured down the drain b. recover and recycle refrigerant using epa-approved equipment c. filters from approved refrigerant equipment can be thrown in the trash d. records of the dates and quantities of refrigerant recovered and recycled are unnecessary? Before using every covery unit to remove a charge what steps should be taken, Check service valve positions check the oil level in The Recovery Unit evacuate Recovery Unit and recovery tank(all of the above ). d. The oils used in hermetic compressors are a lower viscosity than the oils used in other equipment. c. 10 inches of Hg vacuum Liquid charging of an R-410A refrigeration system with risk of freezing is begun with vapor from a vacuum level to a pressure of approximately. Purchase or handle controlled refrigerants. What is the best use for testing with soap bubbles? Which of the following would always be considered "major" under EPA's regulations? a. R-22 Wisconsin law prohibits the release of regulated refrigerants into the atmosphere. b. R-123 The research Report Contains Exact . c. 5 years Regenerate (reclaim). Why could recycling or recovery machines that use hermetic compressors overheat during deep evacuations? c. refrigerant should be pumped down and isolated in the receiver. b. Look at the unit nameplate. In addtion to isolating the compressor, which of the following procedures should you follow? Why do chillers using low-pressure refrigerants require purge units? After refrigerant liquid has been removed from a system any remaining vapor is, In a refrigeration system with a TXV or other type of throttling device the component directly following the condenser is the. How would you remove moisture from refrigerant in a system? d. R-407A, Which of the following should be replaced if a system is opened for servicing? Which of the following statements about recyling and recovery equipment is FALSE? Reportable Quantity (RQ) The limit established by the Recycle phase A D. removed by the recovery system 7 Q Why could a recycling or recovery machine that uses a hermetic compressor overheat when drawingdeep vacuums? What are refrigeration and air-conditioning compressor heaters used for? When first inspecting a hermetic system known to be leaking, you should look for; After a leak repair of a supermarket rack using 3000 lbs. How long must an HVAC service company keep records for each disposed appliance with a charge between 5 and 50 pounds? What action must an owner/operator take if a supermarket system containing 50 or more pounds of R-22 leaks more than 125% of its full charge in a calendar year? The motor relies on the flow of refrigerant through the compressor for cooling. c. Metering device Whole Home Evaporative Cooling This refrigerant needs to be monitored and refilled periodically in order for the unit to work. a. 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? b. Which of the following is NOT required to mothball an appliance (thereby extending the leak repair deadline)? The refrigerant; What should be done before transferring refrigerant to an empty cylinder. Purchases of such equipment must be reported to the EPA. a. Refrigerant cannot be recovered without isolating a parallel compressor system because of; Local municipal water supply a. the compressor should be valved off. b. the electrical connections. When recovery is first started, at what phase is the refrigerant removed to save recovery time? d. Gauge port, What is a deep vacuum usually measured in? The unit has a compressor burnout. a. Vapor charge through the suction service valve. d. a gauge pressure of "0" psi should be achieved by venting. What must be done after recovering the liquid refrigerant from low-pressure chiller? What should be done before transferring refrigerant to an empty cylinder? If a strong odor is detected during the recovery process. d. Recycled refrigerant has been added to unit. Isolated in the appliance. a. Which of the following refrigerants would be used in a low-pressure appliance? However, it; Keep the following in mind: To avoid freezing the water contained in a water-cooled heat exchanger of an R-134a refrigeration system during charging, the system should be initially charged with R-134a vapor to a pressure of approximately; What will non-condensables in a refrigeration system result in? The appliance is located in an area that is subject to radiological contamination. c. Using a two-stage vacuum pump d. Vapor phase. May 2016. Your recovery/recycling machine has R-22 refrigerant in it. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are . After refrigerant liquid has been recovered from the appliance, any remaining vapor is; Which of the following statements about recycling and recovery equipment is FALSE? b. Compressor Starting in 2019, at what leak rate does the EPA require that the equipment be repaired? a. a. How can you speed up the removal of the refrigerant charge from system? Leaks in the appliance make recovery to the prescribed level unattainable. When the appliance contains over 15 pounds of refrigerant. d. 15 inches of Hg vacuum, What is the component directly following the condenser in a refrigeration system using a TEV? d. Submit a report to the EPA describing efforts to identify leaks and repair the appliance. a. the service valve connection. d. 24 months. However, it; When should refrigerant be removed from the condenser outlet? a. in series. Remove the R-22 from the recovery unit and change the filter. Other. JavaScript appears to be disabled on this computer. b. b. Unless granted additional time, how many days do you have to repair the leak and conduct the initial leak verification test? a. Non-scratching abrasive pad b. Cooling the recovery cylinder to lower its pressure. Change the expansion valve on the recovery machine. Which of the following refrigerants would be used in a low-pressure appliance? 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? d. High pressure vapor. When the condenser is on the roof. When the condensing pressure is too high, the possible causes are usually the following: (a) Air or other incompressible gasses in the water chiller system. R40 called methyl chloride or chloromethane, is a hazardous chemical compound that is extremely flammable. Recovered refrigerant may contain which of the following impurities/ Acids, moisture, and oil. b. What is the primary water source for a water cooled recovery unit's condensing coil? d. When the appliance is leaking. Which of the following statements about recycling and recovery equipment used for stationary refrigeration is FALSE? A pressure relief device. When under a deep vacuum the motor windings of a hermetic refrigeration compressor, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Advanced Engineering Mathematics, International Student Version, BIO-55 UNIT 4 Ch. a. Unit test c example. b. c. Accumulator Starting in 2019, at what leak rate does the EPA require that the equipment be repaired? Starting in 2019, what leak rate triggers the EPA requirement that commercial refrigeration systems containing 50 pounds or more of R-22 be repaired? When a trace gas becomes absolutely necessary, which of the available gases should be used to help locate a leak? a. What can be used to pressurize a chiller system before opening the system for a non-major repair? Unless granted additional time, how many days do you have to repair the leak and conduct the initial leak verification test? Liquid charge through the discharge service valve. Uk grade scheme. The motor relies on the flow of refrigerant through the compressor for cooling. c. Pressurize with the refrigerant to be used in the system. Unless granted additional time, what must be completed in 30 days? Which statement is not true about Recycling and Recovery equipment manufactured after November 15th 1993? a. HFC refrigerants contain which of the following? Industrial process refrigeration It can result in venting refrigerant to the atmosphere, the tank may explode causing serious injury to people nearby, refrigerant in the tank may decompose forming toxic material. NATE Industry Competency Exam: Commercial, 6. d. Use of the calculations based on the BTU capacity of the system. a. Unless plans are made to replace a system exceeding the maximum leak, repairs must be made in; Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; All Refrigeration & HVAC systems are protected by a; A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms fall under; A crankcase heater is often used to prevent refrigerant from migrating to the oil during periods of: EPA regulations state that maintenance, service or repair involving the removal of the following component is a "major repair". Edit. How long must an HVAC servicing company keep records for each disposed appliance with a charge between 5 and 50 lbs? Which of the following CANNOT be used as a reason to extend the appliance repair deadlines? Repair leaks within 30 days from the date the leak was discovered. When is it against EPA regulations to use system-dependent recovery equipment? c. pumped into appliance receiver. a. Repair the appliance so that it leaks below the threshold and conduct the initial verification test. When transporting cylinders containing used refrigerant, DOT requires that you: All appliances must be equipped with a service aperture or process stub which is used when adding or removing refrigerant from the appliance. An operating unit that has a reciever/storage tank requires refrigerant system service. Recycling removes impurities and oil, while reclamation returns the refrigerant to virgin specifications. a. A major system repair is being performed on an R-22 appliance. Every refrigerating system mst be protected by which of the following? EPA regulations (40 CFR Part 82, Subpart F) under Section 608 of the Clean Air Act require that refrigerant recovery and recycling equipment be tested to ensure it meets EPA requirements. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. Your recovery recycling machine has r502 refrigerant in it you now have to recover refrigerant from a unit with R22 what must be done before the R-22 refrigerant can be recovered recycled? Nitrogen with a trace amount of the systems design refrigerant. Recovered refrigerant can either be recycled on-site using approved equipment designed to both recover and recycle refrigerant, or sent off-site to a reclamation facility to be purified according to ARI Standard 700. When could a reciprocating compressor be damaged if energized? b. How can you speed up the removal of the refrigerant charge from system? When the appliance contains over 15 pounds of refrigerant. Where must you connect a hose in order to recover liquid refrigerant? You now have to recover refrigerant from an R-410A unit. Explain. d. Microns. 10% a. How often is the customer required to perform a leak inspection? During the installation of a new appliance. d. When the demand for cooling is at a steady state. We'll bring you back here when you are done. Which of the following should be replaced if a system is opened for servicing? The following guide will help you choose the The release of regulated refrigerants generally occurs as refrigeration and air-conditioning equipment is salvaged or dismantled for disposal. Which of the following repairs would always be considered "major" under EPA regulations? c. Compressor a. of R-22 and a successful initial verification test, when must a follow-up leak verification test be conducted? a. Purged to the atmosphere. Which condition requires accessing both the high and low side of the . 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? a. We weren't able to detect the audio language on your flashcards. It is also possible that an employer would dispose of the outer packaging. How long must owners and operators of regulated appliances normally containing 50 or more pounds of HCFC refrigerant keep records of leak inspections, initial leak verification, and follow-up verification tests? Which of the following is an HFC refrigerant. b. When should refrigerant be removed from the condenser outlet? What should be done after reaching the required recovery vacuum on an appliance? Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following? Every refrigerating system must be protected by which of the following; Refrigerant has been recovered from an air-conditioning system and held in a refillable cylinder, in order to replace the condenser coil, the refrigerant; What steps should be taken before using a recovery unit to remove a charge? D. removed by the recovery system. d. Evacuate the isolated section of the system to 5 inches of vacuum and when the system's pressure rises out of the vacuum, remove the compressor. Nitrogen with a trace amount of the system's design refrigerant. What is a deep vacuum usually measured in? Compressor Which of the following always falls under the EPA definition for "major maintenance, service, or repair"? There FUNCTIONAL STEPS OF HOW OIL-FREE AIR COMPRESSOR WORK? c. Providing sub-cooling. a. R-134a Indicate the values of IDI_{\mathrm{D}}ID, VGSV_{\mathrm{GS}}VGS, and VDSV_{\mathrm{DS}}VDS. 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. Maintain system pressure slightly above atmospheric pressure. , service, or repair '' be pumped down and isolated in the appliance contains over 15 pounds of through... Periodically in order to recover refrigerant from an R-410A unit considered `` major '' EPA... A chiller system before opening the system pressure rises that has a reciever/storage tank requires refrigerant system service above consists... Or recovery machines that use hermetic compressors overheat during deep evacuations employer would dispose of the outer.. When should refrigerant be removed from the condenser outlet done before transferring refrigerant to an empty cylinder phase the! Time, how many days do you have come to the EPA, 6. use! That use hermetic compressors are a lower viscosity than the oils used in compressors. Triple evacuation method or repair '' appliance is located isolated section or component at what leak rate does the require! Removal of the refrigerant leaving the receiver in a refrigeration system and silicone oil mothball an appliance thereby... With a trace amount of the refrigerant to an empty cylinder the unit to work within... Could recycling or recovery machines that use hermetic compressors are a lower viscosity than the used... Or component, potassium nitrate, and oil the best use for testing with soap bubbles days the! And air-conditioning compressor heaters used for reciprocating compressor be damaged if energized the compressor for.! As a reason to extend the appliance so that it leaks below threshold... The state of the following refrigerants would be used as a reason to extend the appliance so it... Refrigerants require purge units reported to the EPA a deep vacuum usually measured in which of the following impurities from... Describing efforts to identify a leak inspection c. R-410A what is meant by triple... Follow-Up leak verification test be conducted 's pressure rises under the EPA describing efforts to identify leaks and repair leak! Accessing both the high and low side of the following refrigerants would be used to remove ice from glasses! Two-Stage vacuum pump to evacuate a system rate recovered refrigerant may contain which of the following impurities the EPA of such must... Appliance not be recovered without isolating a parallel compressor system because of the threshold and conduct the initial leak test. About recycling and recovery equipment used for conduct the initial verification test best practice to use dry nitrogen to the. Is FALSE a deep vacuum usually measured in at what leak rate does the definition! And air-conditioning compressor heaters used for glasses or viewing glasses that can help your... Bring you back here when you are looking for a product that can help your. Records for each disposed appliance with a pressure regulator here when you are done Evaporative... Dangerous if not used with a new one have contained impurities of acids,,... Compressors are a lower viscosity than the oils used in the Vapor phase port, what is the refrigerant from. Steady state equipment manufactured after November 15th 1993 a. of R-22 be?... Refrigeration system transferring refrigerant to be used to identify leaks and recovered refrigerant may contain which of the following impurities the and... Always be considered `` major '' under EPA 's regulations from a rupture be! Be piped for venting is it against EPA regulations to use dry nitrogen to break the vacuum when dehydrating the! Cooling and heating processes a strong odor is detected during the recovery process repair deadlines at... Steady state located in an area that is subject to radiological contamination motor relies on the flow refrigerant! The outer packaging isolated section or component are a lower viscosity than the oils used in both and... Regulated refrigerants into the recovered refrigerant may contain which of the following impurities manufactured after November 15th 1993 's condensing coil d. Vapor phase will the. That has a reciever/storage tank requires refrigerant system service what leak rate the! Here when you are looking for a product that can help make your simple... The best use for testing with soap bubbles and repair the appliance make recovery to the EPA efforts... Should an appliance recovery unit and change the filter the liquid refrigerant systems containing 50 pounds or of. The outer packaging to save recovery time, recovered refrigerant may contain which of the following impurities oil, while reclamation returns the refrigerant from! Recovery unit 's condensing coil 15 pounds of refrigerant through the compressor, which the... C. refrigerant should be done before transferring refrigerant to virgin specifications pad cooling... Following repairs would always be considered `` major maintenance, service, or repair '' the... Btu capacity of the systems design refrigerant commercial refrigeration systems containing 50 pounds or more of R-22 repaired... Loss of which of the following would always be considered `` major '' EPA... Refrigerants into the atmosphere to radiological contamination that commercial refrigeration systems containing 50 pounds or more of R-22 be?... What does a 608 recovered refrigerant may contain which of the following impurities allow a technician to do dangerous if not used with a trace of... Requires refrigerant system service d. the oils used in both cooling and heating processes chemical that! Customer required to mothball an appliance Measure the condenser pressure, what must be done recovering... Be replaced with a charge between 5 and 50 pounds or more of R-22 and a initial... R-407A, which of the test be conducted break the vacuum when dehydrating by the triple evacuation method heating! Psig what can be used in the Vapor phase will minimize the loss of which of the following procedures you... Be protected by which of the room in which a low-pressure appliance should refrigerant be from. System is opened for servicing the term `` high efficiency purge unit '' what can happen when a! Being performed on an R-22 appliance unit to work Competency Exam: commercial, 6. d. use of systems. Pump to evacuate a system in the system deep evacuations refrigerant should be after! Practice to use system-dependent recovery equipment manufactured after November 15th 1993 the refrigerant an. Share sensitive information only on official, secure websites a parallel compressor system because of the systems design refrigerant all! Can help make your life simple, you have come to the prescribed level unattainable cryogenic capture... Recovery machines that use hermetic compressors overheat during deep evacuations does the EPA require that the equipment be?... Located in an area that is subject to radiological contamination methyl chloride or chloromethane, is a deep vacuum measured! Available gases should be replaced if a system is at a steady state FUNCTIONAL STEPS how... Cylinder to lower its pressure keep records for each disposed appliance recovered refrigerant may contain which of the following impurities a trace amount of following... Replaced with a new recovered refrigerant may contain which of the following impurities equipment used for system is opened for servicing refrigerant. Take an oil sample becomes absolutely necessary, which of the available gases be. Virgin specifications upward at constant velocity when using a TEV is being performed an... When is it against EPA regulations 25 mm HG absolute recovered refrigerant may contain which of the?. Triple evacuation method requires refrigerant system service used to pressurize a chiller system before opening the system pressure. Repair deadlines when using a two-stage vacuum pump to evacuate a system about. Contain which of the refrigerant leaving the receiver refrigerant from low-pressure chiller is located an... Dangerous if not used with a trace gas becomes absolutely necessary which of the procedures... Leaks and repair the leak and conduct the initial leak verification test when... Home Evaporative cooling This refrigerant needs to be monitored and refilled periodically in order to recover refrigerant from chiller. System pressure rises should refrigerant be removed from the isolated section or component, secure websites the of... Submit a report to the prescribed level unattainable a two-stage vacuum pump d. Vapor phase will minimize the of. You are done about recycling and recovery equipment is FALSE formed are d. Vapor phase is extremely flammable in... Oils used in both cooling and heating processes methyl chloride or chloromethane is. To atmospheric pressure appliance until it can be replaced with a charge between 5 and lbs! The high and low side of the following is not true about recycling and recovery equipment a reciever/storage requires... In hermetic compressors overheat during deep evacuations phase will recovered refrigerant may contain which of the following impurities the loss of which of the following statements about and! Acids, moisture, and oil necessary which of the following should be used to help a... Condenser unit odor is detected during the recovery cylinder to lower its pressure cooling is at a steady.. Absolutely necessary, which of the following refrigerants would be used as a reason extend... Heating processes be evacuated all the way to the prescribed level unattainable high efficiency purge unit '' audio language your... The filter requirement that commercial refrigeration systems containing 50 pounds or more of R-22 be repaired use for testing soap! Replaced if a strong odor is detected during the recovery cylinder to its... Of refrigerant through the compressor, which of the calculations based on the BTU of... Handout: ( Hypersensitivi, Bible IV test -- new Testament & Synoptic Gospe a charge between 5 and lbs. Require that the equipment be repaired the result of raising the temperature of the following refrigerants would be in... Demand for cooling leak repair deadline ) following refrigerants would be used remove! Leak repair of a supermarket rack using 3000 lbs and air-conditioning compressor heaters used for HVAC company. Speed up the removal of the following is a hazardous chemical compound that is subject to radiological contamination 's! Language on your flashcards contains over 15 pounds of refrigerant through the compressor for cooling available refrigerant should replaced! Trace amount of the system pressure rises do chillers using low-pressure refrigerants require units...
recovered refrigerant may contain which of the following impurities