Spring Cooling Systems Service will be provided quarterly in March, June and September. Check and start up all air conditioning systems in March. Notify the City of any deficiencies or parts which need to be replaced. The following preventive maintenance will be performed on all cooling units during the months of March, June and September: Lubricate blower & motor bearings Check belt condition and tension Check condenser coils and clean Check evaporator cooling coil and clean Check operating pressures Check Freon charge and leak test units with low charge (excluding geothermal units) Check thermostat and control Check condenser efficiency and clean contacts Set dampers and check fan speed for summer operation Check safety controls for correct operation and setting Check superheat setting and adjust