Turn off the gas resource and the circulating pump will stop working.

关闭气源开关,让循环泵停止工作.

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Close the middle circulating valve and stop the circulating pump.

2关闭中循环阀门,停循环泵.

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Start up the circulating pump.

启动循环泵.

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Check the circulating pump to find out whether the electric current is normal.

检查循环泵试运转电流是否正常.

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