Operating Procedure of Air Handling Units and Ventilations Units

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  • Objective:To lay down an Operating Procedure for Air Handling Units, Exhaust,Supply and Ventilations Units.
  • Scope:This Standard Operating Procedure is applicable to the formulation plant of Pharmaceutical Company.
  • Responsibility:
    • The Concerned Technician shall follow the Operating Procedure as per this SOP
    • The Officer/Executive-Engineering shall be responsible for implementation of the procedure as per this SOP.
  • Accpuntability: Head-Engineering/Designee shall ensure the compliance of the procedure as per this SOP.
  • Abbreviations and Definitions:
  • MCC :Machine Control Center
  • BMS : Building Management System
  • VFD : Variable Frequency Drive
  • DDC : Digital Display Control
  • RH : Relative Humidity
  • RA : Return Air
  • AHU : Air Handling Unit
  • Procedure
  • In Auto Mode
  • Pre Startup Checkup: 
  • Ensure Power supply shall “ON” from MCC panel for all Air Handling Units,Exhaust and Supply and Ventilations Units.
  • Ensure Chilled Water and Hot water circulation is going on. Working Pressure of Chilled water and Hot water shall be more than 1 Kg/Cm2.
  • All VFD’s and Starters shall be in remote/auto mode.
  • UPS power supply to BMS and all DDC panels shall be “ON”.
  • Starting Procedure:
  • All AHUs, Global Exhaust, Global Supply and all ventilation Unit shall start through BMS which is Programmed for as per following sequence:-
    • Core Corridor’s AHUs  and  Exhaust Unit shall start before 10 minutes of other AHUs as scheduled.
    • After 10 minutes all other AHUs, Supply and Ventilation Units shall start as scheduled.
    • All AHUs are programmed for Design Temperature and RH settings. If there is any change in room condition requirement then Engineering-Executive/ Officer can only change the setting.
    • There are three level securities Password in BMS login.
      • One is primary level for operator. Operator shall be authorized for data checking only he can also take printout of data like RA Temperature, RH.
      • Second level is for Engineering persons who can change the:
        • Room condition settings.
        • Change in Alarm setting.
        • To make new login for Operators
      • Third level is for Administrator. In this level only ABB Engineer is authorized to change all setting, Change password of Second Level and reprogram the system.
      • Record all the data after every three hours as per Annexure-I.
    • In Manual Mode
      • Pre Startup Checkup
        • Ensure Power supply shall “ON” from MCC panel for all Air Handling Units,Exhaust and  Supply and Ventilation Units.
        • Ensure Chilled Water and Hot water circulation is going on. Working Pressure of Chilled water and Hot water shall be more than 1 Kg/Cm2.
        • All VFD’s and Starters shall be in Manual/Local mode.
      • Starting Procedure
        • Start the core corridor AHU’s along with exhaust unit to maintain positive pressure in core corridor.
        • Start the all other AHU’s along with ventilation units after 10 minutes of Core Corridors AHU’s and Global Exhaust Units.
        • Record all the data after every three hours as per Annexure-I.
    • Forms and Annexure:
      • Logbook : Annexure – I
    •  Distribution
      • Master Copy : Documentation Cell
      • Controlled Copies :Engineering, Quality Assurance, Production,Warehouse, Quality control, Administration and House Keeping.
    •  History
Date Revision Number Reason for revision
– 00 New SOP

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