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Fume Hood Un-hibernation Procedure

Fume hood un-hibernation procedures for F&CS maintenance personnel

  1. Appropriate laboratory/building personnel will identify fume hood(s) to un-hibernate.  Record hood location, date and name of person requesting, and send to Unit Facility Representative contact who will submit a service request. Service requests can be submitted online at the following location: Maximo. The following link details the information and account numbers to use when issuing the service request.

  2. Obtain and wear proper PPE.
  3. Locate hibernation record.
  4. Survey lab ventilation system to identify all supply and exhaust airflow sources. Verify required flow rates for each supply and exhaust component from hibernation report.  Verify and calculate required air change rates. If the hibernation record is not found contact Cole Tucker and EHS to determine required airflows and air change rate.
  5. Make sure lab personnel or EHS have removed all chemicals and equipment from hood bench and corrosive storage cabinets.
  6. Take air flow FPM readings. Calculate and record CFM for entry in OneNote before and after un-hibernating or increasing hood flow.
  7. Perform proper steps to commission/inspect hood:
    • Hoods not connected to common header: Un-secure exhaust fan and damper and remove lock and tag out, if exhaust fan was turned off (not supplying general exhaust, etc.).
    • Hoods connected to common header: Un-secure VAV and make necessary
      adjustments to mechanical components and/or controls.
    • Note: If VAV is Phoenix brand: Re-install power (24V) from hood monitor and
      reconnect the valve actuator linkage, holding on to the linkage and letting it close
      and open slowly, to ensure the valve can function freely.
  8. Remove “Hood not in use” sign on sash and physically secure sash closed (remove
    tape, etc.)
  9. Take pressure/flow reading to make certain space is properly balanced and
    pressurization is correct. Note: If reheat is the only heat source, supply air may have to
    be rebalanced.
  10. Remove “Hood out of Service” in red text from graphic in Building Automation System (BAS).
  11. Check BAS and EMCS for alarms generated and have them restored to normal
    operations. Test them with the EMCS operator to verify functionality.
  12. E-mail appropriate personnel (building coordinator, general foreperson ECCT group,
    ECCT program manager and Maximo personnel – Mike Tubbs or Steve Phayre) that
    un-hibernation sequence has been completed.
  13. Determine if the lab was put in vacancy mode in the BAS or EMCS. If so, remove
    all locked features and verify lab pressurizations and air exchange rates.
  14. Contact EHS for potential walk through and to identify lab as operational.