The Model 85520 is a microprocessor-controlled controller with a 120 VAC power supply. It is fully programmable and can be used as a timer or a controller. Controllers have a wider idle time range than timers and a memory relay for enabling/disabling the pre-lubrication function. The controller is used to program the lubrication pump cycle frequency. Lubrication cycles are determined by the setting of internal switches, and the cycle time is selected according to system requirements. During operating time, air is supplied to the pump solenoid.