Type I Study Info Flashcards
A standard ___ ___ can only be used as a recovery device in combination with a non-pressurized container. The vacuum pump is only used to reduce the pressure of a recovery cylinder or container into a vacuum before the recovery process.
vacuum pump
System dependent devices may only be used on appliances containing ___ ___ of refrigerant or less
15 lbs
When using a ___ ___ recovery process on an appliance with an operating compressor, run the compressor and recover from the high side of the system. Usually, one access fitting on the high side will be sufficient to reach the required recovery rate as the appliance compressor should be capable of pumping the refrigerant to the high side.
system-dependent
Small appliances used in campers or other recreational vehicles may use refrigerants such as ___ ___ ___ and therefore should not be recovered using current recovery equipment.
Ammonia, Hydrogen, or water,
Technicians maintaining, servicing, repairing or disposing of high-pressure to very high-pressure appliances, except small appliances and motor vehicle air conditioning systems (MVAC), must be certified as a ___ ___ Technician or a Universal Technician.
Type II
In order to use an electronic leak detector on a system that is pressurized with nitrogen, a trace of refrigerant ___ be added to the system.
must
A refrigeration unit using an open compressor that has not been used in several months is likely to leak from the rotating
shaft seal.
During a visual inspection of any type of system, traces of oil are an indication of a refrigerant leak. Excessive ___ caused by a low refrigerant charge is also an indication of a leak in a high-pressure system.
superheat
EPA regulations require all comfort cooling (air conditioning) appliances containing 50 lbs. or more of a regulated refrigerant to have annual leak inspections to determine if the appliance is leaking. The appliance must be repaired within 30 days when the annual leak rate exceeds ___ of the total charge. A leak-test must be performed after each repair attempt, and a follow-up verification leak-test must be conducted within 10 days of the repair.
10%
The time frame for mandatory leak repair can only be extended by a certified service technician. If the leaking appliance is not going to be repaired, it must be ___ ___ ___ When an appliance is mothballed, the leaking component of the system must be isolated and the refrigerant recovered to prevent further leaking.
retired or mothballed
Type II appliances that will not be repaired must be retrofitted or retired in 12 months. If the appliance is using an exempt refrigerant then the owner has ___ ___ to retire the leaking system.
18 months
All commercial and industrial process refrigeration (IPR) containing more than 50 lbs. of refrigerant MUST be repaired when the annual leak rate is exceeds ___ for commercial appliances and ___ for IPR.
20%
30%
Commercial refrigeration appliances and IPR with a full charge of 500 pounds or more of a regulated refrigerant will require a leak inspection to be conducted every ___ unless a refrigerant leak monitoring system is installed or it has not exceeded the leak rate for four quarters.
three months
When an appliance containing 50 lbs. of a regulated refrigerant or more leaks ___ ___ ___ the owner must submit a report to EPA describing efforts to identify leaks and repair. All records for leak inspections, initial verification, verification tests and records of recovered refrigerant from equipment with ___ to ___ lbs. must be kept for 3 years by the owner or operator. This includes the quantity of refrigerant, by type added, recovered from disposed appliances in each calendar month and quantity of refrigerant, by type, sent for reclamation or destruction. Topping off a system is considered adding refrigerant due to a leak and must be accounted for in the leak-rate calculation.
125% or more
5 to 50 lbs.
