EPA 608 Type III Exam Correct 100% Correct!!

Before recovering refrigerant from a chiller suspected of having tube leaks,... - ANSWER ...drain the water sides of the evaporator and condenser. Draining the water sides helps to avoid the introduction of additional water into the system cause by the evacuation process and to prevent the water from freezing as the refrigerant evaporates during recovery. How can you pressurize a low-pressure chiller to make a non-major repair? - ANSWER Warm up the system. Under EPA regulations, you may warm up the refrigerant to pressurize a low-pressure chiller for the purpose of opening the system for a non-major repair. When does the EPA allow you to NOT evacuate to the prescribed level? - ANSWER When leaks in the appliance make evacuation to the prescribed level unattainable. EPA requirements require low-pressure systems to be evacuated to... - ANSWER ...28.9 inches Hg (25 mmHg Absolute, 25,000 microns) unless such evacuation would introduce air into the recovery system because the system has a leak. An industrial process refrigeration system containing 600 pounds of has a substantial leak that is leaking at a rate above the leak rate threshold. Unless granted additional time, what must be completed within 30 days? - ANSWER Repair the appliance so that it leaks below the threshold and conduct the initial verification test. A purge unit is connected to the... - ANSWER ...top of the condenser. The purge unit takes its suction from the top of the condenser because all the refrigerant should be condensed and any vapors at the top of the condenser have to be predominantly non-condensable vapors. Some minor amount of refrigerant is drawn off by the purge unit, which separates this refrigerant from the non-condensable gas (by further cooling this stream). The refrigerant that is separated from the non-condensable vapors is plumbed back into the evaporator of the low-pressure chiller. List some common low-pressure refrigerants and components: - ANSWER R-11; CFC; Manufacture or importation of virgin R-11 is banned R-113; CFC; Manufacture or importation of virgin R-113 is banned R-123; HCFC; To be banned in 2020 R-245ca; HFC; Limited use R-245fa; HFC; Limited use R