Class II, Type A2 Biosafety Cabinet
User Manual
11
Motor Blower
The motors and blowers were selected because they have the following characteristics: low noise levels, low
vibration levels, compatibility with the variable speed control, and most important: efficiency in delivering air
through clean HEPA filters as well as those loaded with a considerable amount of particulate material. Motors
are 1/3 or 1/2 h.p., 115 V single phase and 60 Hertz.
Before servicing the motor, the power cord must be disconnected. In the Class II, Type A2 Biosafety Cabinet
access to the motor-blower is through the front of the unit. If potentially hazardous material has been handled,
the biosafety cabinet should first be decontaminated. If the unit is used to contain non-biological chemical
hazards, the workers and surrounding area should be isolated and protected. The motor is located in the center
of the blower and can be disconnected by removing three motor mounting screws.
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