Author Question: Systems with fixed-restriction metering devices are critical to charge because: A) You must ... (Read 59 times)

RRMR · **on:** Jul 24, 2018

Systems with fixed-restriction metering devices are critical to charge because:

A) You must weight both the system and the refrigerant.
B) They can only be charged one time.
C) The large liquid receivers hold so much refrigerant.
D) The expansion device cannot adjust to changing conditions.

Question 2

Can zeotropes be metered in with the unit operating?

A) Yes, by slightly cracking open the low-side manifold valve and then closing it
B) No, if an early R-410A cylinder with a dip tube is being used
C) Yes, only if the temperature exposure of the cylinder is above 125F
D) No, as the system must be turned off first