Retro-commissioning is a systematic process to improve the efficiency and performance of an existing building or facility that has not undergone a commissioning process during the construction and handing over phases. It can, in many cases, resolve problems that occurred during the period of the design or construction, or rectify problems that have developed throughout the building’s life as equipment used has aged, or as building purpose has changed.
At present, complex buildings features include highly interactive systems paired with elaborate controls that can impact a building performance. EMergy’s retro-commissioning will help property owners identify the operational improvements needed to conserve energy and increase the building occupant’s comfort.
EMergy’s retro-commissioning will identify and resolve problems, including but not limited to:
1) Operating protocols, sensor calibration and sequences
2) Cleaning / reparations
3) Documentation and training requirements
– Adequate HVAC temperature and humidity set points. – HVAC operating schedules according to occupancy. – HVAC sensor calibration. – HVAC controls in working conditions and adjusted according to requirements. – Adequate load distribution among equipment running in parallel, such as pumps and fans. – Appropriate ventilation rates. – Adjustments for oversized and undersized equipment. – No simultaneous heating and cooling unless intended. – Balanced HVAC distribution systems, both water and air. – Appropriate lighting levels for each application, with properly-configured sensors and controls. – Adequate temperature settings for how water systems. – All water distribution systems are without leaks.
– Cleaning HVAC system components, especially those more susceptible to dust accumulation, such as air dampers, ducts and coils. – Cleaning or replacing filters as required. – Cleaning lighting fixtures. – Fans, pumps and their motors are in good working condition, especially components subject to constant wear, such as bearings and belts. – Steam traps have been replaced as required. – Eliminating alterations and manual overrides that diminish equipment performance. – Optimal boiler tuning. – Hot water, chilled water and steam piping are properly insulated according to the NYC Energy Conservation Code. – Sealant and weatherstripping installed where necessary.
Correct and up-to-date permits for all HVAC, plumbing and electrical equipment. – Key staff has been trained on all major systems and procedures, as well as energy conservation. – Operation and maintenance records are implemented. – Operators have access to O&M manuals, maintenance contracts and commissioning reports