What action is NOT recommended during an ammonia system accident?

Increasing the water supply to the condenser during an ammonia system accident is not recommended because it can exacerbate the situation. The condenser is a critical component in managing the thermal dynamics of the system. In the event of an ammonia leak or system failure, the immediate focus should be on controlling the situation and preventing further hazards.

By increasing water supply to the condenser, you could potentially create a thermal shock that might not only make the leak worse but could also create additional hazards for personnel handling the emergency. Maintaining thermal stability is essential in such scenarios, and any action that does not allow for a controlled response could lead to complications.

In contrast, the other actions listed, such as shutting off steam to the generator and shutting down the ammonia pump, are containment strategies aimed at minimizing the release of ammonia and managing the system's pressure and flow to ensure safety. Reducing absorber pressure is also crucial for stabilizing the system and preventing further accidents. Each of these methods focuses on immediate risk mitigation, which is vital during an emergency.