Based on the textbook, how should you charge an R12 walk-in refrigerator with TEV when retrofitting to R401A with an ambient of 80°?
a. Charge until the head pressure reaches 136 psig and it has about 10° subcooling.
b. Charge until the head pressure reaches 167 psig and it has about 10° subcooling.
c. Weigh the R12 as it is being removed, then weigh in 80% by weight of R401A.
d. Charge until no more bubbles appear in the sight glass.
b. Charge until the head pressure reaches 167 psig and it has about 10° subcooling.
You might also like to view...
A downed power line is most likely to result in a(n) _____.
a. ground fault b. phase failure c. arc fault d. short circuit
A virus is a very tiny particle of matter composed of a ____________________ core and a protective ____________________ covering
Fill in the blank(s) with correct word
In ____________________ starters, the control functions are performed by semiconductors.
Fill in the blank(s) with the appropriate word(s).
Different brands of oil can be used in a vehicle from one oil change to another if they meet vehicle specifications, because all oil is ________
A) Of the same viscosity B) Miscible C) The same API group D) Both A and C