Air in the system can prevent proper circulation of water and may cause noisyoperation.
系统内的空气可能妨碍水的正常循环,可能导致运行噪声发生。
2
Drain it at least once a month. Failure to do this may result in noisyoperation and lime and sediment buildup in the bottom of the tank.
至少每个月要排水一次。如果没有这样做,可能会导致热水器运转有噪音,在内胆底部沉淀石灰和水垢。
3
Premature wear and noisyoperation or vibration of the moving parts can be avoided by selecting the size of check valve on the basis of flow conditions.