To drain/winterize your swamp/evaporative cooler, do the following steps. Remember this is to assist, if in doubt seek a professional!
Evaporative (also referred to as swamp coolers) coolers are still common in the Salt Lake area. Many, however, are going to central air units which cool through the regular individual room registers. It so happens that the furnace uses these same registers when heating in the winter. You'll find most coolers on the roof even though the process is the same for those found in a window. A water supply line supplies the interior of the cooler pan with water. An interior pump moves the water to the top of cooler pads, and as the water runs down through the pads a blower draws the outside air through the moist pads. This comes down the through a hall ceiling or window. With the cold air in the winter, the supply line that supplies the water will freeze, break, and flood the attic/interior of your home. For this reason draining is necessary to prevent this. In doing so, the following steps are needed:
1. Locate the saddle valve that supplies the water. This typical is located above the water heater or attached to the rear exterior faucet (hose) that comes out the rear of the house. Turn the water off (clockwise).
2. Turn/disconnect the compression nut counter clockwise, and remove the tube from the value. You may want a bowl to catch the water, with more coming when disconnected in the next step (remember putting a finger over the straw when pulling it out of a drink, same process).
3. Go to the cooler itself (roof or window), remove the front pad (generally the tub enters the cooler near the front pad), and located wear the same line you disconnected below enters the float. Do the same procedure that you did previously to disconnect the tube below. Once disconnected, blow through the tube. This allows any water remaining in the line/tube to drain (you may want to put a bowl under the lower line to catch any water).
4. Disconnect the electricity by unplugging the pump and blower (if hardwired, don't do anything).
5. Drain the cooler pan by removing the pan riser. Water will run out of the bottom of the cooler and down the roof. Some hook a hose under this to have it run down the house. This isn't a bad idea, as it may affect the shingles over time.
6. Remove the cooler pump hose and blow through it. This removes water that may be located in the spider that is on the ceiling of the cooler. Then remove the pump, rinse, dry, and store in the house till the spring/summer. This also gets all of the lime out of the pump, but make sure you dry it.
7. Put back the front cooler pad, and cover the cooler with a cover or plastic. These covers usually are canvas, and can be purchased at your local hardware store.
8. Cover the interior hole or window wear the air enters the home. This generally is in the main floor hall.
YOU'RE DONE! IF IN DOUBT SEEK HELP! Hope this helps.
Salt Lake County
Parker Properties, Inc.