What network related devices are necessary when configuring a miner?

The operation guide for hydro-cooling miners suggests that liquid inside the miners should be completely drained during storage and transportation. If the miners suddenly or temporarily taken away from a cabinet and the liquid in the miners is not completely drained, what impact will it have?

When the inlet temperature of hydro-cooling miners and immersion cooling is controlled at what degree Celsius, will their hashrate be maintained at a high level?

Do quick connectors of a hydro-cooling miner have built-in valves?

How long does it take to shut down all hydro-cooling miners in a cabinet?