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美国人家用电热水器 安装说明书和使用及维护指南(7)

请注意下列事项:
  Please note the following:

  不要将用铁管安装热水器。这个系统应该限于采用符合饮用(可以饮用的)水标准的崭新的管道,例如铜管,CPVC,或聚丁烯管。不要采用PVC水管。
  DO NOT install this water heater with iron piping. The system should be installed only with new piping that is suitable for potable (drinkable) water such as copper, CPVC, or polybutylene. DO NOT use PVC water piping.

  不要采用任何不符合饮用水要求的任何泵、阀门或连接件。
  DO NOT use any pumps, valves, or fittings that are not compatible with potable water.

  不要采用可能对水流造成过大障碍的阀门。只选用全通道球阀或闸阀。
  DO NOT use valves that may cause excessive restriction to water flow. Use full flow ball or gate valves only.

  在饮用水管道上不要采用50/50铅焊料(或任何铅基焊料)。请采用95/5锡-锑或其他等同材料。
  DO NOT use 50/50 tin-lead solder (or any lead based solder) in potable water lines. Use 95/5 tin-antimony or other equivalent material.

  不要篡改电气控制板,温度感应器,加热元件,电气连接,或降温减压安全阀。这种篡改行为将导致所有质量保证条款失效。只有拥有技术资格证书的技术人员才能够维修这些部件。
  DO NOT tamper with the electronic control board, temperature sensors, heating elements, electrical connections, or temperature and pressure relief valve. Tampering voids all warranties. Only qualified technicians should service these components.

  不要采用经过铬酸盐、锅炉密封或其他化学物处理的管道。
  DO NOT use with piping that has been treated with chromates, boiler seal, or other chemicals.

  不要在管道系统中添加任何可能会造成饮用水污染的任何化学物品。
  DO NOT add any chemicals to the system piping which will contaminate the potable water supply.


封闭系统/热膨胀
Closed System/Thermal Expansion


  在一个封闭的水供应系统中,热膨胀可能导致降温减压安全阀的周期性排泄。自来水公司的供水水表可能包含一个止回阀,防倒流装置,或水减压阀。这将产生一个封闭的水系统。在热水器加热期间,水的膨胀会导致热水器内部压力增加。这可能导致降温减压安全阀排泄少量的热水。为了防止这种现象发生,可以考虑下列两条建议:
  Periodic discharge of the temperature and pressure relief valve may be due to thermal expansion in a closed water supply system. The water utility supply meter may contain a check valve, backflow preventer, or water pressure reducing valve. This will create a closed water system. During the heating cycle of the water heater, the water expands causing pressure inside the water heater to increase. This may cause the temperature and pressure relief valve to discharge small quantities of hot water. To prevent this from happening, there are two recommendations:

  1. 在冷水供应管道上安装一个适用于饮用水的隔膜型膨胀罐。这种膨胀罐必须具有50加仑贮存水最小1.5加仑膨胀能力。
    Install a diaphragm-type expansion tank that is suitable for potable water on the cold water supply line. The expansion tank must have a minimum capacity of 1.5 U.S. gallons for every 50 gallons of stored water.

  2. 在冷水供应管道上安装一个125 PSI的减压安全阀。要确保阀门排泄的水直接排放到一个畅通的排水口,并保证不会冻结。请与当地水供应商或管道检查人员联系,了解如何控制这种情况。不要把降温减压安全阀塞住。
    Install a 125 PSI pressure relief valve in the cold water supply line. Make sure the discharge of this valve is directed to an open drain and protected from freezing. Contact the local water supplier or plumbing inspector for information on how to control this situation. Do not plug the temperature and pressure relief valve.

降温减压安全阀
Temperature and Pressure Relief Valve


爆炸危险
Explosion Hazard
  如果降温减压安全阀出现滴水或泄漏现象,需要请有资格认证的管道工来维修。
  不要塞住阀门。
  不要拆卸掉阀门。
   不遵守这些说明可能会导致死亡或爆炸。

  If the temperature and pressure relief valve is dripping or leaking, have a licensed plumber repair it.
  Do not plug valve.
  Do not remove valve.
  Failure to follow these instructions can result in death or explosion.

  为了防止压力或水温过高,必须在标注“T&P RELIEF VALVE”的开口处安装一个降温减压安全阀(参阅图9)。
  For protection against excessive pressures and temperatures, a temperature and pressure relief valve must be installed in the opening marked “T & P RELIEF VALVE” (See Figure 9).

  小心谨慎:为了减少本热水器内压力或温度过高的危险,请按照当地有关规定安装降温减压安全阀,而不是未经美国国家批准的测试实验室认证的降温减压安全阀,并保持定期检查所列的设备或材料的产品,是否符合美国国家标准化组织ANSI Z21.22-1986《热水供应系统的安全阀和自动关闭装置》的有关要求规定。这种阀门所标注的最大设置压力必须不能超过热水器的工作压力。在热水器上标注安装位置的地方安装这种阀门,并用管道引导到阀门排泄的水流出口不高于排水口6英寸的地方,地面应该是建筑结构地面,不要接触的任何使用中的电器。在任何情况下,排泄开口必须不能被堵塞,或减少流量。
  Caution: To reduce the risk of excessive pressures and temperatures in this water heater, install temperature and pressure relief protective equipment required by local codes, but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of the production of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 -1986. This valve must be marked with the maximum set pressure not to exceed the marked maximum working pressure of the water heater. Install the valve into an opening provided and marked for this purpose in the water heater, and orient it or provide tubing so that any discharge from the valve exits only within 6 inches above, or at any distance below, the structural floor, and does not contact any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstance.


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