When the conductivity reaches or exceeds the OEM-recommended threshold, drain, flush and refill, then drain and refill the system again. Purge the system to remove trapped air. Damage caused by poor water quality and system charging can result in tens of thousands of dollars in repair costs. For maximum cooling efficiency, all cooling water systems should be drained and flushed with fresh clean water for a few hours, drained again, then recharged. Remove a few hoses during draining and cleaning, especially where hoses are looped, and inspect for erosion and deposits on the copper fittings and inside the hoses at both ends.
Clean hoses indicate good system maintenance.
The presence of corrosion and deposits indicates the need for more frequent conductivity testing, flushing and cleaning. Corrosion usually is due to water solutions that have degraded, allowing the conductivity to rise. Spring and fall . If necessary, adjust the temperature control sensor for the recirculating water-cooling system to prevent condensation from forming. The water-cooling controls usually have an adjustable set point connected to a solenoid valve that controls the temperature of the cooling water.