Chapter 13 Compare and contrast the similarities and differences of an air conditioning system with that of a refrigeration system? Provide a hand drawn diagram (no cutting and pasting of other sources) of a hydronic air conditioning system and label each component and tell what its purpose is? Chapter 14 Examine the purpose, function and operation of a reversing valve in detail? Categorize the main parts of a heat pump system and then defend why an auxiliary heat pump is required when a heat pump is used to heat a building during extreme cold weather