Startup & Routine Maintenance
The cooler pads should be replaced at startup and during mid-season evaporative cooler maintenance. ( You may need to do this more often based on the mineral content of your local water.) The pad assembly(s) are removed from the unit. Then the stiffener and retainer is removed. The old pad can now be removed and the frames and retainer should be washed to remove scale and dirt. The new pads can then be put in the frames and the retainers and stiffeners re-installed. For proper operation, you must be sure that the pad completely fills the frame with no gaps where air could bypass the pad. It is a good idea to pre-soak the pads prior to placing them in the unit. During the startup and mid-season evaporative cooler maintenance, you should check the blower belt and adjust the tension. To check the belt, it can be rolled off the pulleys. Turn the belt inside out and look for cracks and replace the belt with a new one if cracks are present. The belt can then be turned right side out and reinstalled. The easiest way is to put one end on the smaller pulley. Start the belt onto the bigger pulley and then spin the pulley so that the belt slides into place. Next, you should check the belt tension. Place your finger on top of the belt mid way between the pulleys and push in on the belt. A properly tensioned belt should push in about one inch with normal effort. As part of the startup and mid season maintenance, the blower bearings should be greased or oiled. Cups are provided on each end of the shaft. The motor itself does not normally require oiling.