Includes refrigeration accessories, metering devices and advance control arrangements. Familiarizes students with the refrigeration cycle as it applies to the heat pump. Covers correct charging procedures and sizing of heat pumps. Includes trouble-shooting of heat pumps and cooling systems such as defrost timers, defrost heaters, relays and cold controls with emphasis on schematic and pictorial diagrams. A basic course in reading and interpreting machine shop symbols, welding blueprints and working drawings used in trades and crafts.
Attention is given to dimension, shape, fabrication and assembly.
Applies basic mathematics in the solution of print and performance problems. This course is designed to give each student a complete understanding of all types of electric motors, extending from small shaded pole fan motors to large three phase motors. The student will learn motor theory magnetism and how it affects motor rotation. Motor starting components and protective devices for motor circuits will be explained and shown in detail. Heat dissipation from a motor, motor slippage, and how frequency affects a motor will be discussed.