家用电热水器应该是由美国人热水器公司制造的自清洗节能智能型电热水器，型号为 ____________________________ ，或者经过认可的等价品。对于安装在家庭住宅内的热水器而言，其内胆质量保证年限为 ________ 年，配件质量保证年限为 ________ 年。对于安装在商用应用领域的热水器，则内胆质量保证期为3年，配件质量保证期为1年。 　　
　　Residential electric water heater(s) shall be a self-cleaning Energy Smart electronic model ____________________________ as manufactured by American Water Heater Company, or an approved equal and shall have a ________ -year tank warranty and a ________ -year parts warranty, when installed in a residential application. When installed in a commercial application, the unit will have a 3-year tank warranty and a 1-year parts warranty.
　　热水器容积应该是 ________ 公升，供应电源应该是 ________ 伏，________ 相，________ 赫兹，________ 千瓦，并且经过美国保险商实验室标准UL 174的鉴定、检测和通过。这种热水器应该符合或优于1987年美国联邦《美国国家电器节能法典》(NAECA)的有关要求。
　　Heater(s) shall have a storage capacity of ________ gallons and shall have a rated input of ________ KW at 240 volts, single phase, 60 cycle AC and shall be design certified, tested and listed in accordance with Underwriter's Laboratories standard UL 174. Heaters shall meet or exceed the requirements of the Federal "National Appliance Energy Conservation Act (NAECA)of 1987".
　　热水器容器内胆应该是经过烘烤的Fused Ceramic Shield^TM（熔融陶瓷盾板）内胆，在871^oC高温下熔融结合，形成耐腐蚀的内胆；聚合物材料制成的内胆是不能接受的。每个内胆都应该配置一体化的阳极以提供阳极保护。
　　The interior of the storage tank shall be lined with a baked-on Fused Ceramic Shield^TM lining, fused to the steel at 1600^oF forming a corrosion-resistant lining; polymer linings are not acceptable. Each tank shall be furnished with an internal anode for anodic protection.
　　这种热水器应该配置一个外置的，位于上部的电气接线盒。电气加热元件应该螺纹拧进的，直接浸入式，电阻型加热元件。加热元件的工作应该电子温控器控制调节。如果有一个加热元件出现故障，控制装置应该能够自动使用另一个加热元件来进行水加热，并显示哪一个加热元件出现故障。
　　The unit shall be equipped with an external, top located electrical junction box. Electric heating elements shall be screw-in, direct-immersion, resistance-type heating elements. Element operation shall be controlled by an electronic thermostat. Should an element fail, the control shall automatically utilize the remaining element for heating water and signal which element has failed.
　　这种热水器应该配置控制逻辑电路，当出现无水或水位太低状况时，能够自动关闭加热元件的电源。
　　The unit shall be equipped with control logic that shuts down all electricity to the heating elements in the event of no water or low water levels in the tank.
　　这种热水器应该配置自诊断控制装置，能够监控和显示通电、停电、控制装置故障、启动故障、高温运行、感应器故障、上部加热元件或下部加热元件故障等状态。
　　The water heater shall have a self-diagnostic control that monitors and indicates power on, no power or control failure, start-up failure, high-limit operation, sensor failure, defective upper element, or defective lower element.
　　这种控制装置必须预先设置四种运行模式，包括：智能，节能智能，低温和假期，小住宅等运行模式。
　　The control must be preprogrammed with four operating cycles, Smart, Energy Smart, Low Temperature, and Vacation/Cabin.
　　应该采用热敏电阻感应技术测量水温。通过温度控制按钮设置，智能设置应该能够使得热水器运行在所选择温度上。节能智能设置将监控加热元件的使用情况，并根据监测到的用户的使用习惯调节热水水温。低温设置将自动将水温控制在46^oC以下，在这种设置下，温度设置旋钮将不起作用。假期/小住宅模式将水温控制在10^oC左右，避免冷冻现象的发生。
　　Temperature shall be measured using thermister sensing technology. The Smart setting shall operate the water heater to the temperature selected by the temperaturecontrol knob. The Energy Smart setting shall monitor element usage and adjust the tank temperature for usage pattern detected. The Low Temperature setting shall automatically set the water temperature to a maximum of 115^oF regardless of the temperature setting selected by the temperature control knob. The Vacation/Cabin mode shall set the water temperature to approximately 50^oF to resist freezing.
　　高温关闭功能应该作为热水器的整体之一加以配置。对于每个加热元件，应该在热水器前部设置加热元件观察（检测）孔。应该采用金属外壳将热水器内胆完全包裹起来，并配置非氯氟烃泡沫加以绝缘隔热，以减少热量损失。
　　A high temperature cutoff shall be supplied as an integral part of the heater. Element access panels shall be provided on the front of the heater for each element. The tank shall be totally encased in a metal jacket and insulated with a non-CFC foam to reduce stand-by heat loss.