美国人家用电热水器 安装说明书和使用及维护指南(12)
排水与冲洗Draining and Flushing
如果在冰冻季节关闭热水器，则需要将热水器内的水排干。建议每6个月就要将热水器内胆彻底排水和冲洗一次，除去在运行期间可能累积的沉淀物。请按照下列步骤排去内胆内的水：
The water heater should be drained if being shut down during freezing temperatures. It is recommended that the tank be drained and flushed every 6 months to remove sediment which may buildup during operation. To drain the tank perform the following steps:
关闭热水器电源。
Turn off the power to water heater.关闭冷水进水阀，打开附近的热水水龙头。
Close the cold water inlet valve and open a nearby hot water faucet.用一条软管将排污阀连接到适当的排污口处。
Connect a hose to the drain valve and terminate it to an adequate drain.打开热水器排污阀和附近的热水水龙头。排泄内胆内的所有水。如果需要，用水冲洗内胆，清除沉淀物。
Open the water heater drain valve and the nearest hot water faucet. Allow all the water to drain from the tank. Flush the tank with water as needed to remove sediment.关闭排污阀，重新向内胆注水，重新恢复电源。
Close the drain valve and refill the tank, and restore power.
重要提示：排水软管额定耐温最小不能低于93oC。如果排水软管的额定温度没有达到上述要求，请打开冷水进水阀，打开附近的热水水龙头，直到水不热为止。
Important: Drain hose should be rated for at least 200°F. If the drain hose does not have this rating, open the cold water inlet valve and open a nearby hot water faucet until water is no longer hot.
如果打算长期关闭热水器，则排污阀应该保持开启状态。
If the water heater is going to be shut down for an extended period, the drain valve should be left open.
注：对于台面型热水器的排水，需要拆卸排水观察盖板上的紧固螺丝。通过往下拔将盖板从热水器上卸下来。
NOTE: When draining Table Top models, remove the screw securing the drain access cover. Remove the cover by pulling down and away from the water heater.
Heating Element Replacement
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 | 触电危险 维修之前要切断电源。 操作之前安装好全部部件和控制板。 否则可能导致伤亡或触电。 Electric Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electric shock. |
必须采用与本热水器额定电压/功率相同、款式相同的加热元件进行更换。有关参数可以在加热元件的法兰或接线盒上找到，或者在热水器的参数板上找到。
Replacement heating elements must be of the same style and voltage/wattage rating as the ones presently in the water heater. This information can be found on the flange or terminal block of the element or on the water heater data plate.
关闭热水器电源。
Shut off the electric power to the water heater.按照“排水与冲洗”中的有关说明排掉热水器内的水。
Drain the water heater as directed under "Draining and Flushing".拆卸观察盖板。将加热元件外部的绝缘保温层拆卸下来。从温控器上拆卸塑料温控器盖，确保与温控器上固定点完全分离。
Remove the access cover(s). Fold the insulation outward and away from the heater element(s). Remove the plastic thermostat cover from the thermostat(s) making sure to disengage the attachment point from the thermostat.断开加热元件上的电线（如图13）。使用1.5英寸的套筒扳手按反时针方向旋转拆卸加热元件上的螺丝。拆卸原有的垫圈。
Disconnect the electric wires from the heating element (Figure 13). Remove the screw-in elements by turning the element counterclockwise with an 1-1/2 inch socket wrench. Remove the existing gasket.
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清洗垫圈与内胆接触的地方。如果是拆卸下部加热元件，需要清除累积在内胆底部的沉淀物。
Clean the area where the gasket fits to the tank. If you are replacing the bottom element, remove the accumulated sediment on the bottom of the tank.确保所要替换的新加热元件具有正确的额定电压和功率。在新的加热元件上套上新的垫圈，插入热水器内胆（如图14）。按顺时针方向旋转紧固加热元件，直至安全牢靠为止。
Make sure the replacement element has the correct voltage and wattage rating. Position the new gasket on the element and insert it into the water heater tank (Figure 14). Tighten the element by turning it clockwise until secure.
