A combination system burner is activated by what?

A combination system burner is typically activated by a room thermostat. This type of burner is designed to provide both heating and hot water, and the room thermostat plays a crucial role in regulating the temperature within a space. When the temperature in the room drops below the set point on the thermostat, it sends a signal to the burner to ignite and provide heat. This automation allows for efficient temperature management and energy savings, as the system only operates when necessary.

In contrast, a manual switch would require human intervention to turn the burner on or off, which may not be as efficient or convenient. A remote control might provide an additional layer of convenience for operation, but it is not the standard method for activation in a typical combination system setup. Lastly, while a pressure sensor is essential for safety and ensuring the system operates within safe limits, it does not function as the primary means for activating the burner itself. Therefore, the room thermostat is the key component that initiates the operation of a combination system burner.