Using recovery equipment manufactured after November 15, 1993 on a small appliance whose compressor still operates, how much of the refrigerant charge must be removed?
Correct Answer
D) 90 percent of the refrigerant in the appliance
When the appliance's own compressor still runs and the recovery equipment was manufactured after November 15, 1993, the higher recovery standard applies and 90 percent of the charge must be removed. A working compressor helps push refrigerant toward the recovery machine, so EPA expects a better result. As an alternative to meeting the percentage, the technician may instead evacuate the appliance to 4 inches of mercury vacuum, which satisfies the requirement either way.
Why This Is the Correct Answer
Both conditions for the higher standard are met here: newer recovery equipment and a functioning compressor. Under those circumstances EPA requires 90 percent of the refrigerant to be recovered, because the compressor is available to help move refrigerant out of the sealed system rather than leaving the recovery machine to pull it all.
Why the Other Options Are Wrong
Option A: 80 percent of the refrigerant in the appliance
Eighty percent is the lower standard that applies when the compressor is not functioning or when the recovery equipment predates November 15, 1993. Neither condition applies to this job.
Option B: 75 percent of the refrigerant in the appliance
Seventy-five percent is not a recovery figure anywhere in the small appliance rule. It is close enough to the real numbers to look reasonable but has no basis in the regulation.
Option C: 95 percent of the refrigerant in the appliance
Ninety-five percent is not the small appliance standard. High recovery percentages in that range come from equipment performance claims, not from the regulatory requirement.
Memory Technique
Compressor working means you work harder: 90. Compressor dead means you get a break: 80.
Reference Hint
40 CFR 82.156 small appliance recovery: 90 percent when the compressor operates and the equipment is post November 15, 1993.
More epa-608-type-1 Questions
An under-counter ice maker is one factory-sealed cabinet, while a modular ice machine head is joined to a remote condenser by field-run tubing. What certification does servicing the modular machine's circuit require?
A technician recovers refrigerant from a small appliance using a recovery machine that was manufactured in 1991. What recovery level must that older equipment achieve?
Two technicians recover from identical refrigerators with working compressors, one using a 1991 recovery machine and the other a 2015 machine. Why do their required recovery levels differ?
System-dependent recovery equipment may be used only on appliances that normally hold up to what amount of refrigerant?
What feature defines a self-contained recovery unit and sets it apart from the system-dependent kind?
When system-dependent recovery equipment is used on a small appliance whose compressor still runs, how can that working compressor be put to use?
Recovery from a small appliance has slowed down and the pressure is barely moving. What accepted technique helps drive the remaining refrigerant out?
After the recovery unit stops pulling on a small appliance, how does a technician confirm that the recovery is actually complete?
A sealed small appliance offers no service port at all. What has to happen before recovery equipment can be connected to it?
As refrigerant from a string of small appliances collects in a recovery cylinder, what fill limit applies to that cylinder?
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A technician clamps a bolt-on piercing valve onto the tubing of a factory-sealed refrigerator in order to recover its charge. What does adding that valve do to the unit's classification?
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Recovery equipment that was manufactured before November 15, 1993 and is still used on small appliances has to meet what performance standard?