美國人家用電熱水器
安裝說明書和使用及維護指南(12)

加熱元件的更換
Heating Element Replacement 

　　必須采用與本熱水器額定電壓/功率相同、款式相同的加熱元件進行更換。有關參數可以在加熱元件的法蘭或接線盒上找到，或者在熱水器的參數板上找到。
　　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.

1. 關閉熱水器電源。
   Shut off the electric power to the water heater.

2. 按照“排水與沖洗”中的有關說明排掉熱水器內的水。
   Drain the water heater as directed under "Draining and Flushing".

3. 拆卸觀察蓋板。將加熱元件外部的絕緣保溫層拆卸下來。從溫控器上拆卸塑料溫控器蓋，確保與溫控器上固定點完全分離。
   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.

4. 斷開加熱元件上的電線（如圖13）。使用1.5英寸的套筒扳手按反時針方向旋轉拆卸加熱元件上的螺絲。拆卸原有的墊圈。
   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.

1. 清洗墊圈與內膽接觸的地方。如果是拆卸下部加熱元件，需要清除累積在內膽底部的沉淀物。
   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.

2. 確保所要替換的新加熱元件具有正確的額定電壓和功率。在新的加熱元件上套上新的墊圈，插入熱水器內膽（如圖14）。按順時針方向旋轉緊固加熱元件，直至安全牢靠為止。
   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.

   
   

3. 

關閉排水閥。打開最近的熱水水龍頭，讓內膽完全注滿水。為了清除管道內任何剩余的空氣和沉淀物，請在穩定出水后，讓熱水水龍頭持續出水3分鐘。

Close the drain valve. Open the nearest hot water faucet and allow the tank to fill completely with water. To purge the lines of any excess air and sediment, keep the hot water faucet open for 3 minutes after a constant flow of water is obtained.

檢查加熱元件周圍是否有泄漏。

Check for leaks around the element(s).

連接加熱元件上的電線。確保所有連接的電線牢固可靠。重新安裝溫控器塑料蓋，確保固定點穩固連接在溫控器上。

Connect the electric wires to the heater element. Make sure all wires are secure.Replace the plastic thermostat cover making sure the attachment points are engaged on the thermostat.

重新安裝絕緣保溫層和觀察門。

Replace the insulation and access door(s).

確保熱水器已經注滿水。如果加熱元件沒有浸在水中就通上電流，將會造成加熱元件的損壞。

Make certain the tank is filled with water. Applying electric current to heater elements not submerged in water will destroy them.

重新接通熱水器的電源。

Restore the electric power supply to the water heater.