THEORY OF OPERATION - CONTINUED
AIR CONDITIONING SYSTEM - CONTINUED
N OT E
· In an orifice tube system that is properly charged, frost may form between the orifice tube and the compres-
sor. The frost may be present if the system is operating properly and if the system is properly charged.
· In an orifice tube system, a combination of abnormal pressure and frost may indicate blockage in the system.