EPA Section 608 9th edition V2 Type 2 actual exam 2024 with 100% correct answers(download to pass)

Air-conditioning appliances used to supply cooling in order to control heat and/or humidity in occupied facilities is defined by EPA as Comfort Cooling for the leak repair category. Residential, office and commercial buildings are included in this category. Appliances (equipment) used to preserve products, as in the retail food and cold storage warehouse sectors are classified by EPA as Commercial Refrigeration. If a company uses 55% of its systems cooling capacity to one of its manufacturing lines or refrigeration and 45% of its cooling capacity to air condition the office spaces, it is considered Industrial Process Refrigeration (IPR) for the leak rate category. Use the charge stated on the equipment nameplate to determine normal charge for leak rate calculations when the system is a packaged system charged at the factory. The charge in field-piped split-systems can be calculated using the factory charge plus the charge added for piping and accessories. The unit nameplate is the easiest way to check the type of refrigerant used in a packaged rooftop unit The leak rate of an appliance can be calculated when topping off or recharging a system due to a loss of charge. In addition, the unit's nameplate will indicate the system's total charge. The best method to charge a system that has both an air-cooled condenser and evaporator with a nameplate charge of 80 pounds is a liquid charge by weight through the liquid-line service valve. The EPA's leak repair requirements apply to all appliances using a regulated refrigerant. Once the threshold leak rate has been exceeded on any system with a charge size of 50 pounds or greater, the owner must repair the appliance enough to bring the leak rate below the threshold. If the owner cannot, or chooses not to, bring the leak rate below the threshold, the appliance must be retrofitted or retired. of the charge per year when used for comfort cooling. 10% of the charge per year when used for commercial refrigeration. 20% of the charge per year when used for industrial process refrigeration. 30% If an appliance with 50 or more pounds of a regulated refrigerant has exceeded the threshold leak rate, the equipment owner or operator has 30 days to repair the appliance so that it leaks below the threshold limit and conduct the initial verification test, unless EPA grants additional time. If an appliance with a charge of 200 pounds or more of a regulated refrigerant passes the initial verification leak test, a follow-up verification test must be conducted within 10 days. Not having a certified service technician available for service cannot be used as a reason to extend the appliance leak repair deadline. If after repairing a leak in an HCFC rack refrigeration system used in a supermarket, the system fails the initial leak verification test, the technician has a 30-day window to make additional repairs or develop a retrofit plan. Assuming no extensions apply, a cold storage warehouse operating an appliance charged with R-22 or any other regulated substance leaking above the threshold rate, can continue to operate the appliance without repair for 12 months before it must be retrofitted or retired. If that system leak rate exceeds 125% of its full charge in a calendar year, then a report must be submitted to EPA describing the efforts to identify and repair system leaks. Further action must be taken by repairing, retiring, mothballing, or retrofitting the appliance. An appliance using an ozone-depleting refrigerant does not need to be removed or mothballed by storing in a warehouse at the facility to extend the leak repair deadline. The repair deadline can be extended by temporarily shutting down the appliance, recovering the refrigerant from an isolated section or the entire system to at least atmospheric pressure. The owner or operator has 18 months to retrofit or retire a leaking appliance if the replacement appliance will use a refrigerant exempt from the venting prohibition. Commercial Refrigeration and Industrial Process Refrigeration with more than 500 pounds Once every three months until the owner/operator can demonstrate through leak rate calculations that the leak rate has not exceeded 20% (commercial refrigeration) or 30% (IPR) for four quarters in a row. Commercial Refrigeration and Industrial Process Refrigeration with 50 to 500 pounds Once per calendar year until the owner/operator can demonstrate through the leak rate calculations that the leak rate has not exceeded 20% (commercial refrigeration) or 30% (IPR) for one year. Comfort Cooling with 50 or more pounds Once per calendar year until the owner/operator can demonstrate through the leak rate calculations that the leak rate has not exceeded 10% for one year. Very high-pressure appliance 0" Hg an industrial process refrigeration (IPR) system containing 1000 lbs. or more of R-22, that has exceeded the applicable leak rate threshold, must be inspected for leaks every 3 months until verification that leak rate has not been exceeded for one year after repair. The records of leak inspections, initial leak verification, and follow-up verification tests must be kept on file for three (3) years. The owner and/or operator of the equipment is responsible for keeping the records. After assembly and installation of a split-system, the unit should first be pressurized with an inert gas, such as nitrogen (may also be referred to as dry-nitrogen), and leak checked. When absolutely necessary, dry-nitrogen with a trace amount of the system's design refrigerant should be used for leak detection. For example, an R-407C system should be leak checked with pressurized dry-nitrogen and a trace amount of R-407C.