(2) 当市自来水低于设定压力,但不低于下压力7.84×104Pa时,采用直抽水加压供水方案。即逐步起动2台泵机向管网充压。当检测到市自来水高于设定压力时,再转换成市自来水直接供水。
(3) 当自来水压力持续低于2.94× 104Pa或出现确切负压信号时,应立即转换成抽池水加压,但此时应保证水池水位高于最低限水位的条件。
(4) 当采用直抽水或抽池水加压供水时,应能自动调节其总出口水压为给定值,
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