EPA 608 - Type III

Technicians maintaining, servicing, repairing, or disposing of low-pressure appliances must be certified as: - Type III or Universal Technician The owner &/or operator of the equipment is responsible for keeping: - records including: leak inspections & any completed leak repair verification tests It's the _______ &/or ___________ responsibility to obtain service records from the servicing company doing any work on an appliancem - owner &/ or operator As of 11/14/94, the sale of _______ & _________ refrigerants is restricted to certified technicians - CFC & HCFC As of 1/1/18, the sale of _______ & ________ are also restricted to certified technicians - hfcs & hfos Low-pressure systems are semi-hermetic & operate below: - atmospheric pressure (in a vacuum) Leaks in the gaskets or fittings will cause ___ & _________ to enter the system - air & moisture Leaks must be repaired to reduce the operation of the ________ unit & ______ of refrigerant - purge / loss Leak checking a charged, _____-__________ refrigeration unit is to pressurize the system using controlled hot water or heater blankets - low-pressure When controlled hot water or heater blankets are not feasible on leak checking a charged, low-pressure unit, use __________ to increase system pressure - nitrogen When pressurizing a system, don't exceed _____ psig - 10 Exceeding ____ psig can cause the rupture disk to fail - 10 When leak testing a _______ _____, be certain the water has been removed before placing the leak detector probe through the: - water box / drain valve To leak test a tube, use a ____________ tube test kit - hydrostatic Systems with open drive compressors are prone to leaks at the: - shaft seal Controlled hot water or heating blankets can be used to raise the pressure in a ______-_________ for the purpose of opening the system for a: - low-pressure / non-major repair What does a "major repair" under EPA regulations: - any maintenance, service, or repair involving the removal of the following: compressor, condenser, evaporator, or any auxiliary heat exchanger coil Starting in 2019, EPA regulations require that systems containing more than _____ lbs of refrigerant be repaired when the annual leak rate exceeds a ___________ of the refrigerant charge - 50 / percentage The appliance must be checked after each ________ to verify the leak was successfully repaired - repair Comfort cooling & other types of appliances (ex: humidifiers): - 10% Commerical refrigeration: - 20% Industrial process refrigeration: - 30% When the leak rate exceeds the ______________ percentage on a low-pressure system, the system owner must repair the appliance enough to bring the leak rate below the: - maximum / threshold, or retrofit or retire the appliance An appliance may be ______________ if it's ______ _______ & the leaking section or component is isolated & ___________ of refrigerant to the ______ required level - mothballed / shut down / evacuated / EPA's Refrigerant charge of ______ lbs or greater has exceeded the threshold leak rate, it'll be _____________ or _____________ using a refrigerant exempt from the venting prohibition, owners or operators have _____ months to replace/retrofit the appliance - 50 / retrofitted or replaced / 18 LOW-PRESSURE APPLIANCE LEAKING ABOVE THE LEAK RATE THRESHOLD MUST BE REPAIRED so that it leaks below the threshold & the INITIAL VERIFICATION TEST CONDUCT WITHIN _____ DAYS UNLESS GRANTED ADDITIONAL TIME - 30 INITIAL LEAK-TEST VERIFICATION must be performed WITHIN _____ days (or _______ days if an industrial process shutdown is required) of an appliance exceeding the appliance leak rate. - 30 / 120 The FOLLOW-UP LEAK-TEST MUST BE PERFORMED WITHIN ____ days of the initial leak-test - 10 Each time a system is topped off or recharged the leak-rate must be: - recalculated The deadline to replace or retrofit an appliance ______ __ ________ when a certified service TECHNICIAN IS NOT AVAILABLE to do the work - CANNOT BE EXTENDED ALL RECORDS FOR LEAK INSPECTIONS, INITIAL VERIFICATION, VERIFICATION TESTS, & RECORDS OF RECOVERED REFRIGERANT FROM EQUIPMENT WITH ___ to ____ lbs OF REFRIGERANT MUST BE KEPT FOR ___ YEARS JUST AS IN TYPE II APPLIANCES - 5 to 50 / 3 A recovery unit's high-pressure CUT-OUT IS SET FOR ____ PSIG when evacuating the refrigerant from a low-pressure chiller & a rupture disc on a low-pressure recovery vessel relieves at ____ psig - 10 / 15 Refrigerant recovery from a system using _______ or _______ starts with _________ removal & is followed by ______ recovery - R-11 or R-123 / liquid / vapor A SUBSTANTIAL AMOUNT OF _______ WILL REMAIN in the appliance after all _________ is removed - vapor / liquid An AVERAGE 350 TON, R-123 CHILLER AT 0 PSIG STILL CONTAINS APPROXIMATELY ______ LBS of ______ AFTER ALL THE _________ HAS BEEN REMOVED - 100 / vapor / liquid Most low-pressure recovery machines utilize a water-cooled condenser that's connected to the: - potable or municipal water supply When recovering refrigerant, the system water pumps, the recovery compressor, & the RECOVERY CONDENSER WATER SHOULD ALL BE ON CIRCULATING WATER TO PREVENT: - freezing INCREASING THE TEMPERATURE in an equipment room WILL AID IN FASTER: - recovery A chiller is suspected of tubes leaks, the water sides of the ______________ & ______________ should be drained prior to recovering the refrigerant - evaporator & condenser ASHRAE Guideline 3 states that if the pressure in a system rises from ___ mm Hg to a level above _____ mm Hg during vacuum testing, the system should be leaked checked - 1 / 2.5 When REMOVING OIL FROM A LOW-PRESSURE SYSTEM, a tempt of _______ °F should be ATTAINED TO REDUCE THE AMOUNT OF REFRIGERANT IN THE OIL - 130 Refrigerant is added through the ___________ access point on the system such as the ____________ valve. HOWEVER, introducing ________ refrigerant into a deep vacuum will cause the refrigerant to _____ freezing water in the tubes - lowest / evaporator / liquid / boil Initial charging is in the _______ phase to a pressure _____ enough to increase the saturation tempt of refrigerant above the ____________ tempt of water - vapor / high / freezing Low-pressure refrigeration systems with refrigerants such as ________ REQUIRE A VAPOR PRESSURE EQUAL TO A SATURATION TEMPT OF _____°F OR HIGHER, TO PREVENT FREEZING of water-tubes when charging - R-123 / 36 Topping off a system: - adding refrigerant due to a leak & must be accounted for in the leak-rate calculation Adding refrigerant to a system that's ______, retrofitted, or adjusted for seasonal variance does not need to be accounted for in the leak-rate calculation - new Recovery or recycling equipment manufactured or imported before or after 11/15/93, must be able to achieve a recovery level of: - 25 mm Hg absolute Once the required vacuum has been achieved, the technician should wait for a few minutes & monitor the system: - pressure If the pressure ________, indicating that there's refrigerant remaining in the system, recovery must be: - rises / repeated When leaks in an appliance make EVACUATION to the prescribed level ___________, the appliance should be evacuated to the lowest attainable level prior to a: - unattainable / major repair To use of a LARGE VACUUM PUMP could cause trapped water to: - freeze During EVACUATION of systems with large amounts of ________, it may be necessary to increase pressure by introducing __________ to counteract freezing - water / nitrogen If a strong odor is detected during the recovery process, a ______________ ______-____ may have occurred - compressor burn-out When recovering refrigerant from a system that experienced a compressor burn-out, watch for signs of contamination in the ____ & perform an oil test - oil / Low-pressure chillers using R-123 operate below atmospheric pressure, require a: - purge unit What's the primary purpose of a purge unit? - removes non-condensables from the system A centrifugal chiller's purge unit takes its suction from the top of the _____________, separates air & other non-condensables from the refrigerant, & then returns the refrigerant back to the: - condenser / evaporator Although a high efficiency purge unit discharges a low percentage of refrigerant with the air they remove, frequent purging & subsequent refrigerant loss can indicate: - a leak is allowing air into the system High discharge pressure can indicate: - air in the system Excessive moisture collection in a purge unit can indicate: - tube leakage