Monitored and controlled HVAC pumps, motors, sewerage pumps, water systems, and ventilation systems., Operated and maintained various chiller models, including Trane RTHD and RTAC 407kw series, Pro Chill Thermax vapor absorption chiller (cooling capacity 1759kw), and Pro Chill steam-driven absorption chiller (single and double effect, 1400 NTR)., Conducted daily chilled water supply temperature monitoring., Experienced with water-cooled and air-cooled chillers., Created and maintained performance data sheets for chillers (weekly, monthly, quarterly)., Performed routine maintenance on HVAC equipment, including chillers, air handlers, and cooling towers., Maintained daily refrigeration log sheets and recorded temperatures., Experienced with utility systems, including chilled water, hot water, and steam generation systems., Monitored operation, adjusted, and maintained refrigeration and building control systems., Performed chillers sensor binding., Managed and operated air volume control dampers, fire dampers, and fresh air control dampers., Managed AHU operations, maintaining detailed specifications and quotation records.