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EPA 608

EPA Section 608 Core Review

QuestionAnswer
Who must get certified? Anyone who will perform maintenance, service, or repair that it is reasonably expected to release CFC or HCFC into the atmosphere.
What are the types of certifications? Type I, Type II, Type III and Universal
Does the EPA require recertification? No, but it can change in the future
Who's responsibility is it to comply to any regulation changes? The technician
Type I certification is required for who? Servicing small appliances. Or any appliance that is fully manufactured, charged, and sealed with a charge of 5 lbs or less.
Type II certification is required for who? Any high or very high pressure refrigerants.
What is considered high pressure refrigerants? Boiling points between -58 degrees and 50 degrees F at atmospheric pressure.
What are typical refrigerants used in high pressure refrigerants? R-12, R-22, R-502, and R134a
What is considered very high pressure refrigerants? Boiling points below -50 degrees F at atmospheric pressure.
What are typical refrigerants used in very high pressure refrigerants? R-13, and R-503
Who is required to get Type III certification? Anyone working on low pressure refrigerants
What are typical refrigerants used in low pressure refrigerants? R-11, R-113, and R-123
What is considered low pressure refrigerants? Boiling points above 50 degrees F at atmospheric pressure.
Who need to get the Universal Certification? Anyone who is going to service all types of appliances
What is an appliance (Equipment) It is any device which uses and contain class I or II substances or substitute refrigerant and is used for household or commercial purposes.
What is Asphyxia Loss of consciousness due to lack of oxygen. May be the cause of death.
What is Azeotropic refrigerant? A mixture of refrigerants that act like a single-component refrigerant over its entire range
What is a blended refrigerant? A mixture of three refrigerants, with different vapor pressures. It is not azeotropic.
What is chlorofluorocarbons refrigerants (CFC) It contains elements of chlorine, fluorine, and carbon. It causes the most harm to the stratospheric ozone, and has the highest ODP.
What is dehydration The process of removing water and water vapor from a refrigeration system by putting the system in a vacuum with a vacuum pump.
When is a system considered dehydrated? When the required level of vacuum is reached and held.
What is dehydration time? The length of time needed to remove all moisture from a system.
What determines dehydration time? The capacity of the vacuum pump and the size of the suction line.
What is evacuation? The suggested method used to dehydrate a system. It can also be a method to do a leak check on the system.
What is a Hydrochlorofluorocarbons (HCFC)? Contains the elements of hydrogen, chlorine, fluorine, and carbon. It is less harmful to the stratospheric ozone.
What is Hydrofluorocarbons (HFC)? Contains elements
What is Hygroscopic Readily attracts or absorbs moisture or has a high affinity for water.
What is a Material Safety Data Sheet (MSDS)? A document created by the manufacturer of solvents, chemicals, refrigerants, etc. This document tells you characteristics like: flammability, toxicity, flashpoints, etc.
Mixed refrigerant Is contaminated refrigerant caused by combining two or more different refrigerants in the same container or system. It cannot be recycled.
What is the Ozone? It is a gas that acts as a protective shield for the earth.
What is the stratospheric ozone? It is the ozone layer that is approximately 7 - 30 miles above the earth.
What is Reclaim? It is to reprocess refrigerant to at least the purity specified in ARI Standard 700 and also to verify the purity by chemical analysis.
What is Recover? To remove refrigerant in any condition from an appliance. It is stored in an external container without necessarily testing or processing it.
What is Recycle? To extract refrigerant from an appliance and clean the refrigerant for reuse without meeting all of the requirements for reclamation.
What is Self-contained Recovery Equipment? Recovery or recycling equipment that is capable of removing refrigerant from and appliance without the assistance of components contained in the appliance.
What is a System-dependent Recovery Equipment? A recovery system that requires the assistance of components contained in the appliance. The pressure of the refrigerant in the appliance and capture refrigerant in a non-pressurized container.
What are some examples of synthetic lubricants? Alkylbenzene oils, glycol oil, ester oil, polyol esters
What is temperature glide? For each temperature there is a corresponding pressure.
What is the source of chlorine in the stratosphere? Primarily CFC's
What is chlorine monoxide in the upper stratosphere indicate? Destruction of the ozone
What is the effects of ozone depletion? Increase of skin cancer, increase in cataracts, increase in ground-level ozone, reduced crop yields, and reduced marine life.
What does ASHRAE Standard 34 state? Refrigerants are classified into safety groups based on toxicity and flammability. That there are six classifications.
What are the six classifications of the ASHRAE Standard 34? A1, A2, A3, B1, B2, B3
What does the A or B signify in the ASHRAE Standard 34? The toxicity
What does the 1,2,or 3 signify in the ASHRAE Standard 34? The flammability
What is the Montreal Protocol? A treaty that was first signed by a group of nations in 1987 that agreed to limit production and consumption of chlorofluorocarbons, hydrochlorofluorocarbons, and halons as a global group.
What is the Clean Air Act (CAA)? It is the regulations and requirements that is mandated by the U.S. EPA. It requires the phase out of production fo CFC's and HCFC's. It also prohibits the venting of CFC/HCFC as of July 1, 1992 and its substitutes as of November 1995.
What is Clean Air Act Enforcement? Much like federal codes, state and local governments may make laws by adopting CAA regulation or imposing a even stricter regulation.
Violation of the CAA can result in what? Fines up to $27,500 per day, per violation. Also you could lose your certification and/or appear in federal court.
Supplying information that leads to conviction of violating the CAA can do what? Be rewarded up to $10,000.00
What are the important components of a refrigeration system? Compressor, Condenser, Receiver, Liquid line, metering device, evaporator, accumulator, and suction line.
What are the refrigerant conditions? HPG/HTG, HPL/HTL, LPL/LTL, supercooled liquid, LPG/LTG, and Superheated Gas
What is used most often to pinpoint leaks? Soap bubble test
What are the leak detection methods? Soap bubble test, standard pressure test, evacuation and standing vacuum test.
How do you do a standing pressure test? recover system refrigerant, add nitrogen or trace gas, and then bring system up to leak-finding pressure.
What is the exception to the evacuation requirements? If, due to leaks, the required evacuation level is not attainable, or substantially contaminate refrigerant
What are the rules for Recovery Cylinders? Cylinders should be dedicated for each type of refrigerant being recovered. If two or more refrigerants are mixed in one container, the refrigerant cannot be recycled and may be impossible to reclaim. Approved recovery cylinders are color coded.
Approved recovery cylinders are what color? Gray body and yellow top
Can you use a disposable cylinder to recover refrigerant? No
What is the suggested method of evacuation? Dehydration
What can too much vacuum pump capacity cause? Moisture trapped in the system to freeze.
What can too little vacuum pump capacity cause? Increase dehydration time
What can affect the speed and efficiency of evacuation and dehydration? Ambient temperature, moisture in the system, and size of system being evacuated.
What might you add to the system if you have moisture in the system? Dry Ice
What can happen if moisture is left in the system? It will form hydrochloric and hydrofluoric acid
Why should you use short hoses between unit and recovery device and vacuum pump? Reduces pressure drop, reduces recovery time, reduces amount of potential refrigerant emissions.
What size should the vacuum hose be compared to the vacuum pump's intake? Be the same size or larger.
Where should the systems vacuum gauge be located? As far away from the vacuum pump for accurate readings during evacuation.
How do you get the final accurate vacuum measurement from the system? Isolated from the vacuum pump with the pump turned off.
What type of storage and recovery containers should you use? DOT approved
What are reusable cylinders sometimes called? Returnable cylinders or Refillable cylinders.
How often are reusable cylinders required to be safety tested? Every 5 years tested and stamped
What are disposable cylinders sometimes called? One trip cylinders or DOT 39 cylinders.
What are disposable cylinders used for? Original or virgin refrigerant
When filling reusable refrigerant, what capacity weight must not be exceeded? 80% (allows for expansion).
How can the fill level be controlled by? Scale (weight), electronic shutoff device (thermistor), or float device (mechanical)
What has to be done when transporting refrigerant cylinders? Secure cylinders in the upright position, and put a DOT classification tag or label on cylinder.
When checking the cylinder integrity, what are you looking for? The cylinder should be free of dents, srapes to the bare metal, rust, or other damage
What should disposable cylinders be recycled as? Scrap metal after the internal cylinder pressure is reduced to 0 psi
What should you do with reusable cylinders when you are done? Return them to the manufacturer.
What are some safety precautions when handling refrigerants? Wear appropriate protective clothing, be familiar with the MSDS, avoid inhalation, avoid contact with skin and eyes, and never expose refrigerant or refrigerant tank to open flame
What are some safety precautions when servicing appliances? Never use oxygen or compressed air to pressurize system, use dry nitrogen to energize system, faulty or corroded relief valves should be replaced. Do not exceed the system's test pressure.
Created by: MJCC
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