美国人电热水器 安装说明书和使用及维护指南(9) 热水器的操作
Before operating the water heater, make sure the water heater has been properly installed.
Completely fill the tank with water.
Apply power to the water heater only after the tank is completely filled with water.
Carefully read and understand the section, "Water Temperature Regulation", of this manual.
Important: Do not attempt to operate this water heater if the temperature(s), or surrounding insulation has been exposed to water in any way. Immediately call a qualified service technician to inspect the water heater and replace any temperature, or insulation that has been exposed to water. Do not attempt to repair these parts. Water heaters subjected to flood conditions or any time the temperature(s) have been submerged in water require replacement of the entire water heater.
This water heater is designed to automatically shut off in the event that the water temperature exceeds170°F (77°C). A high limit control switch is used to shut off the power to the elements if the water temperature exceeds 170°F (77°C). The high limit control can be reset by firmly pushing in the red reset button located on the thermostat. Follow the instructions under "Adjusting the Thermostat/High Limit Control" to properly reset the high limit control.
Water Temperature Regulation
Water temperature over 125°F can cause severe burns instantly or death from scalds.
Children, disabled, and elderly are at highest risk of being scalded.
See the instruction manual before setting temperature at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available.
The thermostat is adjusted to a temperature setting of 120°F or lower when it is shipped from the factory. Water temperature can be regulated by adjusting the temperature control system to the preferred setting as shown in "Adjusting the Thermostat/High limit Control." The recommended starting point is 120°F. There is a hot water scald potential if the temperature control is set too high.
Important: Adjusting the temperature past 120°F on the temperature control will increase the risk of scald injury. Hot water can produce first degree burns within:
120°F (49°C) more than 5 minutes
130°F (54°C) at 20 seconds
140°F (60°C) at 3 seconds
150°F (66°C) at 1-1/2 seconds
160°F (71°C) at less than 1 second
During low demand periods when hot water is not being used, a lower thermostat setting will reduce energy losses and may satisfy your normal hot water needs. If hot water use is expected to be more than normal, a higher thermostat setting may be required to meet the increased demand.
When leaving your home for extended periods (vacations, etc.) turn the thermostat to its lowest setting. This will maintain the water at low temperatures with minimum energy losses and prevent the tank from freezing during cold weather.