Select the statement that correctly describes heating with 115VAC and ON/OFF conditions.

• A. The drain masts heat only when the ON/OFF is ON.
• B. The drain masts heat when 230VAC is applied.
• C. The ON/OFF state has influence on heating even with 115VAC.
• D. The drain masts heat whenever 115VAC power is applied to the controller, regardless of the ON/OFF state.

Answer: (D)

Heating is driven by the presence of the 115 VAC supply, not by the ON/OFF control. If the heater circuit is connected to the same 115 VAC that powers the controller, it will energize whenever that power is applied, regardless of the ON/OFF state. The ON/OFF switch may control other parts of the system, but it does not prevent heating as long as 115 VAC is present.

The other statements imply that heating depends on the ON/OFF or on a different voltage, or that the ON/OFF still influences heating, which is not the case in this setup.