Question

question # 20
a high - pressure appliance containing 210 lbs. of r - 407c refrigerant must be evacuated (recovered) to a level of;
a 15 inches of vacuum
b 10 inches of vacuum
c 4 inches of vacuum
d 0 inches of vacuum

Explanation:

High - pressure appliances with refrigerants must be evacuated to 15 inches of vacuum for proper recovery. This is a standard requirement in refrigerant handling to ensure complete removal of air and non - condensable gases.

Answer:

A. 15 inches of vacuum