Because very little hot water is required to maintain the low temperature in the mains (usually 140of), a relatively small capacity recirculator can generally be specified.

由于只需要很少的热水来维持主管道的低温度(通常为60oc)，通常可能需要指定一个相对较小功率的循环器。

NOTE: Recirculating control aquastat must be set at least 5oF to 10oF lower than the temperature setting of the Series N170-M2 valve, otherwise the recirculator will run continually.

注：再循环控制水温自动调节器的温度设置必须比系列N170-M2阀门的设置温度低5至10华氏度，否则，再循环器将会不断运行。