Installing Residential Central Air Conditioning Systems

24.11

• This is a condensing unit with flared or brazed tubing connections and service valves. Refrigerant control is provided by a thermostatic expansion valve.

Rooftop Units24.19

• Rooftop units were originally developed for flat-roofed commercial structures.

26.3 Thermostat Operation

• A bimetal-operated thermostat with four mercury switches (two are shown highlighted).