Wiring Instructions for a Downdraft Swamp Cooler

Downdraft swamp coolers, also called evaporative coolers, use a blower to pull in outside air for cooling. As air is drawn into the cooler, it passes over a membrane filled with water. This membrane adds humidity to the air drawn inside the cooler, lowering the temperature of the air. Most evaporative coolers in the United States run on a standard 120 volt circuit. You can wire one of these coolers up yourself and keep summer temperatures at bay.

Screwdriver
Wire strippers

Instructions

- 1
  Turn off the electrical supply at the main circuit breaker where you will connect the swamp cooler.
- 2
  Turn off the water supply for the cooler at the nearest water cut off valve. If the valve isn't immediately adjacent to the cooler, trace your way down the pipe until you find the valve. Rotate the valve from the current position to cut the water supply.
- 3
  Use a screwdriver to remove the electrical panel cover on the swamp cooler.
- 4
  Strip off the last half inch or wiring covering on the electrical circuit wire with a pair of wire strippers.
- 5
  Loosen the terminal screws inside the electrical panel on the swamp cooler with a screwdriver.
- 6
  Wrap the black terminal wire around the terminal marked "Live" or "Hot." Squeeze the ends together with a pair of needlenose pliers. Tighten the terminal screw. Repeat this process for the white wire, connecting it to the terminal marked "Neutral" or "Return." Connect the bare copper wire to the green terminal screw.
- 7
  Replace the electrical panel cover. Restore the water supply.
- 8
  Turn the power on for the electrical circuit where the cooler is installed.

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