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).