Type II — High-PressureQuestion 123 of 240
A supermarket rack system holds 350 pounds of R-404A. Using recovery equipment manufactured after November 15, 1993, to what vacuum must the technician evacuate during recovery?
a.15 inches Hg vacuum
b.10 inches Hg vacuum
c.4 inches Hg vacuum
d.25 mm Hg absolute
Explanation
For a high-pressure appliance containing 200 pounds or more of refrigerant, recovery equipment made after November 15, 1993 must reach 15 inches of mercury vacuum. Systems under 200 pounds require only 10 inches Hg. The 25 mm Hg absolute level applies to low-pressure (Type III) appliances, not high-pressure racks.
Law Reference: 40 CFR §82.156Practice all 240 questions free — no signup required.
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