Where must an installation label be affixed after a fixed fire extinguisher system has been installed?

The installation label must be affixed on the control head or panel of the fixed fire extinguisher system because this location ensures easy access and visibility for identification and operational purposes. The control head or panel is where operators can quickly find vital information regarding the system's specifications, maintenance history, and operational guidelines. Placing the label here allows for efficient monitoring and compliance with safety regulations, facilitating quick reference during inspections or maintenance.

In contrast, affixing the label to the owner’s property could lead to it being overlooked or damaged, as it may not offer the necessary context for the system itself. Placing it on the wall adjacent to the extinguisher does not directly associate it with the functioning components of the system, which could create confusion. Lastly, applying the label to the fire marshal’s office is irrelevant, as that location would not provide direct access to the system in question and does not serve the purpose of informing users about the specific installation and operation of the fire suppression equipment.