NuAire LabGard NU-560-400, Operation & Maintenance Manual

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OM0295
Rev 2 September 2020 Page 12 of 103
5.0 Installation Instructions
5.1 Location
Within the laboratory, pharmacy, etc., the ideal location of the Biosafety cabinet is away from personnel traffic lanes, air
vents (in or out), doors and/or any other source of disruptive air currents.
If drafts or other disruptive air currents exceed the inflow velocity of the cabinet through the access opening, the potential
exists for contaminated air to exit or enter the work zone area of the cabinet. It depends on the severity of the air current.
REMEMBER: A BIOSAFETY CABINET IS NO SUBSTITUTE FOR GOOD LABORATORY TECHNIQUE.
Where space permits, a clear 6 inch (152mm) area should be permitted on each side of the cabinet for maintenance
purposes. The electrical outlet into which the cabinet is connected should be readily accessible for maintenance purposes.
Do not position the cabinet to prevent access to the power cord.
The power cord plug serves as the disconnect and
should remain readily accessible. If the outlet is inaccessible, such as a conduit (hardwired) connection, then an appropriate
warning label should be applied near the cabinet's on/off switch, to indicate the circuit breaker on the power distribution
panel to be used.
More than any other Biosafety cabinet, the NU-560 requires careful site-planning and preparation, due to the total exhaust
nature of the cabinet. Proper sizing of the exhaust and make up supply systems are critical to the successful installation of
the cabinet. In addition, the cabinet provides for the choice of make-up air for the supply (downflow) air. The following are
airflow requirements based on concurrent balance values*.
Air Volume (CFM/CMH) Supply Air Inflow Exhaust Air**
NU-560-400 544 / 924 271 / 461 815 / 1385
NU-560-600 865 / 1470 410 / 697 1275 / 2166
*Concurrent Balance Value is determined by a duct traverse measurement method as specified in ASHRAE Standard 111 at
its nominal setpoint calibrated using the primary DIM method and capture hood removed. These values shall be used for
design and balance exhaust/supply HVAC requirements.
**Exhaust air volume at negative 1.7 inches (43mm) w.g. for NU-560-400
1.8 inches (46mm) w.g. for NU-560-600