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?
Correct Answer
D) Equipment made on or after November 15, 1993 must reach ninety percent, while older equipment must reach eighty percent
The appliances are identical and both compressors run, so the only variable left is the recovery equipment. The standard splits on the November 15, 1993 manufacture date: machines built on or after it must remove ninety percent of the charge from a small appliance with an operating compressor, and machines built before it are held to eighty percent. Neither machine gets a different amount of time and neither target depends on the refrigerant inside the box.
Why This Is the Correct Answer
With the appliance and its compressor condition held constant, the recovery equipment's manufacture date is the only thing that can change the answer. The November 15, 1993 line separates the ninety percent standard applied to newer certified equipment from the eighty percent standard grandfathered for older machines.
Why the Other Options Are Wrong
Option A: Older machines work more slowly, so the rules allow them extra time rather than a different target to finish the recovery
The rules set performance targets, not time allowances. How long a machine takes to finish has no effect on how much refrigerant has to come out of the appliance.
Option B: The newer machine has to reach a deeper vacuum because it carries a larger internal compressor and motor
Deeper vacuum requirements belong to larger high-pressure and low-pressure appliances. Nothing about the size of a recovery machine's own compressor sets the target for a small appliance.
Option C: Recovery targets are set by refrigerant type, and machines of that era were built for CFC service work
Recovery levels for small appliances do not vary by refrigerant. The same percentages apply whether the box holds R-12, R-134a, or a hydrocarbon, so the machine's date is what decides.
Memory Technique
Ninety-three splits the fleet: born after, pull ninety; born before, pull eighty.
Reference Hint
40 CFR 82.156(a): ninety percent with an operating compressor using equipment manufactured on or after November 15, 1993; eighty percent for older equipment.
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?
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?
A technician recovers R-134a into a cylinder that still holds recovered R-12 from an earlier job. What is the consequence for that refrigerant?
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