American CoolAir Axial Wall Fans
THERMOSTATS: The T109 is a two stage thermostat in a NEMA 4X box, with a temperature range from 40°-100° F, and for use in control of a 3/4 HP (or less), 2 speed motor. T16 is a single stage thermostat in a NEMA 4X box, with a temperature range from 40°-100° F, and for use in control of a 1 HP (or less) motor. The A19 is a single stage, single pole thermostat with a temperature range from 30° to 100° F and for use in control of a 1 HP (or less) motor.
HOW RADIAL LOADING AFFECTS FAN LIFE: Radial bearing loading is the largest factor affecting fan life, causing premature deterioration of fan life over a period of time. Radial bearing loading is minimized when the drive load is in the same plane as the bearings. Radial bearing loading is multiplied dramatically as the load is offset from the bearings. The relationship is usually expressed as L10 hours life, which is a good indicator of the useful life of the bearings, a fans most critical component.
HOW DRIVE DESIGN AFFECTS FAN LIFE: Drive design has a direct impact on fan life. A design that uses much larger drives or driven pulley diameters ensures longer belt life, typically twice that of designs using smaller drives or driven pulley diameters. Also, the ability to align all components precisely is affected by the distance between bearings. The difficulty of proper alignment increases exponentially as the distance between bearings increases.
HOW BLADE ASSEMBLY AFFECTS FAN LIFE:The blade assembly is one of the hardest working parts of a fan. This assembly is subjected to conditions that encourage vibration and in turn can reduce fan life. American Coolair hubs incorporate a circular support that increases blade assembly rigidity by a factor of at least two.
HOW PAINT FINISH AFFECTS FAN LIFE: An effective paint finish begins with proper cleaning and pretreatment. Any finish is limited by the bond it establishes at the surface of the fan. Then a continuous quality coating must be properly applied - experts agree that electrostatically applied thermosetting epoxy coatings are superior to conventional liquid painting. Finally the finish must be baked on, rather than air dried, if acceptable levels of finish hardness are to be achieved.
HOW MAINTENANCE AFFECTS FAN LIFE: Proper fan maintenance is essential for efficient, trouble-free service. It is recommended that periodic cleaning of the entire unit be performed. Keep the motor and blade clean for efficient operation. Instructions for proper lubrication of the fan motor are shown on the motor. All pivot points on the shutter should be wiped clean periodically.