... cleaning host machine, the circulation time is about 8 hours.Cleaning cooling water, the time is 6 ... chilled water, the time is 12 to 24 hours.7, According to the suggested dose and time ... water into red show tht system already clean.8, Before removing wastewater, Please neutralize Sodium Hydroxide ... or Soda ash to 7-8, this can guarantee dischange sewage can meet the ...