Buckley et al. (l985) discuss using a selector to control condensate temperature at 100oC in a reflux drum, where the manipulated variable is the cooling water flow rate. If the condensate temperature becomes too low, the temperature controller reduces the cooling water flow rate, causing the cooling water exit temperature to use. However, if the water temperature exceeds 50 to 60°C, excessive fouling and corrosion can result. Draw a schematic diagram that uses a selector to keep the exit temperature below 50oC. Determine the valve action (A – O or A – C) for the how control valve and whether the level controller should be reverse or direct acting.