Section III. TECHNICAL PRINCIPLES OF OPERATION
a. THE REFRIGERATION CYCLE. The refrigeration system removes heat from a
given area. See Figure 1-6 for a schematic of the refrigeration cycle.
(1) The compressor (B1) takes cold, low pressure refrigerant gas and compresses it to
a high temperature, high pressure gas. This gas flows through the copper tubing to the
(2) The condenser fan draws outside ambient air over and through the condenser coil
(C). The high temperature, high pressure gas from the compressor (B1) is cooled by the flow of
air and is changed into a high pressure liquid.
(3) The liquid sight glass (G) indicates the presence of moisture and quantity of
refrigerant in the system.