Using EMCS Data to Document and Improve Air Handler Performance

Traditionally, energy monitoring and control systems (EMCS) have been used, as the name implies, to monitor and control heating, ventilating and air conditioning systems, however, this paper will identify other benefits of an EMCS. Recording EMCS data on a periodic basis, typically once an hour, and analyzing it using a commercial off the shelf database program has proven to be an effective method to improve and document indoor air quality, energy savings; and provide continuous controls commissioning and performance diagnostics. Identification of system problems is the key to having an efficient and reliable EMCS. Once identified they can be scheduled to be repaired and system integrity will be maintained. Specific diagnostic and functionality programming include: Identifying leaking heating and cooling control valves Identifying simultaneous heating and cooling operation Identifying proper air side economizer operation Identifying faulty components Identifying cooling and heating system problems Calculating ventilation rates Calculating energy wastes and savings Finally, using EMCS data in the non-traditional manner has saved thousands of dollars in operation and maintenance costs by providing a hands-off "tool" to diagnose air handler performance