A window unit's data plate lists a ten ounce charge, the compressor ran throughout the job, the recovery machine was built in 2015, and nine ounces now sit in the recovery cylinder. What does that result mean?
Correct Answer
A) The ninety percent requirement is satisfied, so the sealed circuit may now be opened
The machine is of the newer vintage and the appliance compressor operated, which puts this job in the ninety percent branch. Nine ounces out of a ten ounce factory charge is exactly ninety percent, so the requirement is met and the technician may open the circuit. The arithmetic is deliberately simple because the point being tested is which figure applies, not the multiplication. Had the compressor been seized, the same machine would have been held to eighty percent, and eight ounces would have been enough.
Why This Is the Correct Answer
Two facts set the level here: the recovery machine was built after November 15, 1993, and the appliance compressor ran. That pair puts the job in the ninety percent branch. Nine ounces recovered against a ten ounce factory charge lands exactly on that figure, so the requirement is satisfied and there is no reason to keep the machine running before opening the system.
Why the Other Options Are Wrong
Option B: Only eighty percent applies with a running compressor, so an extra ounce came out needlessly
Eighty percent is the figure for a newer machine working on an appliance whose compressor will not run. Swapping the two conditions is the single most common mistake on this rule.
Option C: The result falls short, because a running compressor raises the target to the entire charge
No branch of the small appliance rule asks for the entire charge. The requirement tops out at ninety percent precisely because the compressor oil holds some refrigerant back.
Option D: The reading cannot count, because recovered weight is never used to judge the requirement
Weighing what comes out against the factory charge is exactly how the percentage routes are demonstrated. The alternative to weighing is the vacuum reading, not a ban on the scale.
Memory Technique
Running compressor, higher bar. The unit that helps you is the unit that is held to more.
Reference Hint
Newer recovery equipment: ninety percent with the compressor running, eighty percent with it not running.
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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