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2
Chapter 2 -† Installation
2.1.桠 General Requirement
2.1.1.桠 Location Requirements
The BSC needs to be sited in a location that does not compromise the performance of the unit.
The following requirements should be taken into account:
桠 † If necessary, the arm rest and sash cover can be removed to reduce the overall depth of the cabinet.
Detailed instructions on how to carry out this step can be obtained from your Esco Service
Representative.
桠 † Poor siting of a cabinet can adversely affect performance. A specialist engineer and safety personnel in
your facility should be consulted on correct positioning of the cabinet prior to installation.
桠 † Cabinets should never be sited in line with a doorway, a window that can be opened, or adjacent to a
thoroughfare. Care should be taken to ensure that potential effect of room air diffusers, fans, extractors,
vents, etc. on the BSC are taken into account and any risk of airflow disturbance is appropriately treated
(e.g. eliminated, mitigated) before installation.
桠 † Room air supply diffusers should not be within 1.5 meter (5') of the front aperture. If there are large
numbers of cabinets in a laboratory this recommendation may be difficult to comply with, but where
diffusers have to be placed in close proximity to a safety cabinet, their discharge velocities will need
to be low.
桠 † The position of a BSC should satisfy the spatial requirements (e.g. vision, lighting and convenience of
access) of the operator and people working nearby. If the cabinet is installed on a bench top, the
leading edge should slightly overhang or be flush with the edge of the bench top.
桠 † There should not be an open space between the leading edge of the cabinet and the front of the
bench as this may create turbulence in front of the aperture. It also provides an obstacle which could
adversely affect airflow across the cabinet face.
2.1.1.1.桠 Position Requirements
Any pedestrian traffic routes, thoroughfares or walkways should be at least 1.0 metre
(3') from the front of the cabinet, so as to preserve zone undisturbed by anyone other
than the operator.
As seen in the chart, your cabinet's internal airflow velocity is relatively low
compared to the airflow disturbances potentially caused by opening a door, a
person walking by or a direct exposure to an air-conditioning outlet. These
external airflow disturbances can affect the containment of the BSC.
Therefore, the BSC should be located as far away as possible from sources of
airflow disturbance and in an orientation which optimally shields the cabinet's
airflow from all external airflow disturbances. There should be adequate SOP
in place to minimize events that will affect the performance of the cabinets.
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