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BMS - BUILDING MANAGEMENT SYSTEM
Building Management Systems

Building Management or Building Automation normally called BMS is the system used to control & monitor various processes, operations inside a building.The advancement in the technology seamlessly integrates BMS (HVAC controls - Heating, Ventilation and Air- Conditioning three closely related fundamental functions found in homes, offices and other building structures, Lift monitoring, DG, UPS etc), Energy management, Security (Video Surveillance), Life safety (Fire alarm, fire extinguishing) etc. BMS provides accurate control and better comfort, increases productivity, decreases manpower requirement, reduces operating cost, energy savings.

At OBS we have dedicated our expertise and experience in BMS activities with the products and technical support of Larsen and Toubro ltd (L&T), a USD 7 billion company.

Why BMS

  • Provides accurate control and better comfort;
  • Increase productivity;
  • Improves Compliance;
  • Decreases manpower requirement;
  • Increase flexibility;
  • Analyzes Alarms;
  • Reduce Operating Cost;
  • Definite Energy Savings;
  • Effective monitoring & targeting energy consumption in each and every area. Improves Building reliability and life;
  • Eliminates possible human error.
Building Management Systems

What can we do through BMS system - we can monitor and log history and control events for the followings:

  1. CHW (chilled water) supply temperature of individual chillers, common CHW supply and return header temperatures.
  2. Run status of each CHW pumps through a differential pressure switch across the CHW pumps for ON/OFF status.
  3. Monitoring the trip status of each CHW pump through a potential free contact signal generated at the pump logic controller and keeping the operator at the central station (IBMS PC) informed to take necessary corrective action in case of trip.
  4. Monitor the outside air temperature and relative humidity.
  5. Monitor Flow meter status.
  6. Switching ON/OFF of each air handling unit Supply & Return /exhaust fan based on program time schedule.
  7. Monitor the running status of each blower fan through a differential pressure switch and keep a logic of the number of hours run.
  8. Monitor filter status of each air handling unit by a differential pressure switch & give an alarm in case the filter gets choked.
    Monitor the return air temperature and give an alarm for high/ low of temperature.
  9. Based on comparison of desired /set temperature & return air temperature the 2-way modulating valve is proportionally controlled.
  10. Monitor AHU being switched on a manual basis i.e. an indication /alarm to come on the screen, if any equipment is running in manual mode.
  11. BMS shall be programmed to run the AHU in economy air cycle based on comparison of outside air temperature and humidity. In this mode, the exhaust fan will be switched on while the fresh air & exhaust air motorized damper shall be opened fully. In this mode, the return air motorized damper will be fully closed. BMS shall be also programmed to run the AHU in economy air cycle in the early hours of the day to purge out the warm and stale air of the rooms. The mode of operation for supply /exhaust fans and dampers shall remain same as described above.
  12. Monitoring the fire trip status of AHU supply fan through potential free contact provision provided in the duct smoke detector.
  13. Based on the pressure built-up between supply and return header, the Secondary chilled water pumping flow shall be varied by means of VFD. The VFD pumping speed shall be constantly monitored.
  14. The CHW flow through each chiller shall be monitored by means of a high quality Flow meter/sensor.
  15. Switching ON/OFF of each fan according to time schedule.
  16. Monitor the running status of each blower fan through a differential pressure switch and keep a log of the number of hours run.
  17. Monitor the trip status condition of each unit through a potential free contact made available in the starter panel and subsequently give an alarm.
  18. Monitor filter status by a differential pressure switch & give an alarm in case the filter gets choked.
  19. Monitoring the fan’s being switched on a manual basis i.e. an indication/alarm to come on the screen, if any equipment is running in manual mode.
  20. Monitor the status of each precision unit.
  21. Monitor the status of each VAV unit.
  22. Monitoring of all the parameters such as KW, KVA, V, A, PF etc.
  23. Monitor the status of DG system.
  24. Monitor the status of each UPS.
  25. Monitoring the run/trip status of each pump through a potential free contact signal generated at the pump starter panel.