WebPage 11 operation float valve during tower operation with heat load to maintain 100mm water depth in the depressed section of the basin on Models 490—493. Maintain 140mm water depth on Models 494—496. Hot water temperatures exceeding 50°C could damage PVC fill. Note 6. Page 12 operation 10. WebControl Valve [if float valve is not used] – a control valve maybe selected over the float valve which would utilize level sensors within the tower sump / tower basin to monitor the level. Once the water level is needing to be topped up, the level sensors will send a signal to the control valve to open, allowing fresh water to enter the system.

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