Thermostatic control apparatus for evaporative cooling system

Control apparatus for controlling electrical current flow including signal voltage and line voltage in an evaporative cooling system having a blower and a pump operated by the line voltage, comprising, in combination:

• first switch means selectively connected to the thermostat, to the blower, and to the pump, for selecting one of a plurality of modes of operation of the blower and pump, including
• a first plurality of terminals,
• a first switch element movable between some of the first plurality of terminals representing the modes of operation of the pump,
• a second plurality of terminals, and
• a second switch element movable with the first switch element between some of the second plurality of terminals representing the modes of operation of the blower;
• a thermostat connected to one terminal of the second plurality of terminals, including
• a pair of contacts, and
• a temperature responsive element connected to one contact of the pair of contacts and adapted to make contact with the other contact of the pair of contacts upon a temperature rise;
• second switch means connected to the pump and to the first switch means and selectively actuable for controlling line voltage for operating the pump in response to the selected mode of operation of the first switch means;
• and
• third switch means connected to the blower and to the first switch means and selectively actuable for controlling line voltage for operating the blower in response to the selected mode of operation of the first switch means and of the thermostat.