Maintains accurate and timely equipment operating logs, lubrication logs, HVACR equipment operation and maintenance manuals, inventory of filters and belts and spare parts, air pressure drop differential logs across air filters and coils, refrigerant logbooks, chemical water treatment logs and refrigerant inventory. Monitors BMS, checks for refrigerant system operation efficiency, stops/starts systems, operates refrigerant recovery equipment, vacuum pumps, charging equipment and service gauges using best practice procedures, brazes refrigerant piping and lubricates fans, motors and linkages.