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Installing Residential Central Air Conditioning Systems 24.11 This is a condensing unit with flared or brazed tubing connections and service valves. Refrigerant.

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Presentation on theme: "Installing Residential Central Air Conditioning Systems 24.11 This is a condensing unit with flared or brazed tubing connections and service valves. Refrigerant."— Presentation transcript:

1 Installing Residential Central Air Conditioning Systems This is a condensing unit with flared or brazed tubing connections and service valves. Refrigerant control is provided by a thermostatic expansion valve.

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

3 26.3 Thermostat Operation A bimetal-operated thermostat with four mercury switches (two are shown highlighted).

4 Basic Refrigeration Cycle

5 3.4 Low-Side Float Refrigerant Control Note the float needle, low- side float, and pressure motor control.

6 3.5 External-Drive (Open) Refrigeration System

7 3.12 Cascade Refrigerating Systems

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10 3.13 Modulating Refrigeration Cycle

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