Before any electrical connections are made, be sure that the heater is full of water and that the valve in the cold water supply line is open.
在进行电路连接之前，请确认热水器是否已经注满水，冷水进口阀门是否处于开启状态。
Note: the potable water expansion tank shall be installed in the cold water service pipe line on the supply side of the water heater.
注：饮用水膨胀罐应该安装在热水器的供水端的冷水维修管道上。
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