What purpose does the support box heater element serve on the BAK-14?

The support box heater element on the BAK-14 is designed primarily to keep the air cylinder and other mechanical parts from freezing. In cold operating conditions, moisture can condense and freeze, potentially leading to mechanical failures or difficulties in the functioning of the BAK-14 system. By maintaining a higher temperature around the air cylinder and other vital components, the support box heater helps ensure that the equipment remains operational and that the moving parts can function smoothly without the risks associated with freezing. This is essential for maintaining the reliability and safety of the equipment in harsh weather conditions, as frozen components could hinder performance and pose risks during operations.

While the other answer choices highlight valid concerns about freezing in different contexts, they do not specifically address the primary function of the heater element as it pertains to the air cylinder and mechanical parts.