The Carrier 33TBAC01 thermostat is a specialized commercial device designed for single-stage heating and cooling. Because this model is often used in light commercial applications, proper installation is critical for equipment longevity and energy efficiency.
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The “top” detaches from the base for wiring. carrier 33tbac01 installation manual top
| Switch | Setting 1 (Up/Off) | Setting 2 (Down/On) | What it changes | | :--- | :--- | :--- | :--- | | SW1 | Electric Heat | Gas/Oil Heat | Fan behavior (Gas delays fan start) | | SW2 | Standard Heat Pump | Conventional AC | Reversing valve logic (O vs B) | | SW3 | 2-pipe System | 4-pipe System | Valve control logic | | SW4 | Celsius (°C) | Fahrenheit (°F) | Display units | | SW5 | Standard (3 cycles/hr) | Comfort (6 cycles/hr) | Compressor cycling rate | | SW6 | Backlight Off | Backlight On | LCD illumination | | SW7 | Auto Fan disabled | Auto Fan enabled | Fan runs with heat/cool demand | | SW8 | 5 min compressor delay | 0 min delay | Anti-short cycle protection | The Carrier 33TBAC01 thermostat is a specialized commercial