What is the primary reason for keeping the steam valve supplying unit radiators open?

• A. To prevent excessive heating of the unit
• B. To ensure efficient water circulation
• C. To avoid system malfunctions except during maintenance
• D. To maintain constant heating in the system

Answer: (C)

The primary reason for keeping the steam valve supplying unit radiators open is to maintain constant heating in the system. When the steam valve is open, it allows steam to flow into the radiators, ensuring they receive the necessary heat to warm the space effectively. This constant flow of steam is crucial for achieving a stable temperature throughout the areas served by the heating system.

Moreover, if the valve were to be closed or not opened sufficiently, it could lead to fluctuations in temperature, resulting in areas becoming too cold or not heating up properly. Maintaining an open steam valve helps ensure that the heating system operates as designed, providing comfort and consistent heating for the occupants. This is especially important in larger systems where even minor discrepancies in heat distribution can lead to discomfort.