Labconco PuriCare Procedure Stations 38100 - Manual (Page 25)

Chapter 4: Performance Features and Safety Precautions
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Motor/Blower
The motor/blower assembly pulls air into the front of the cabinet, and re-
circulates it internally. During its recirculation, the air is split into two
separate streams. One path leads through the exhaust HEPA filter and out of
the unit. The second path flows through the supply HEPA filter, which then
flows down through the work area, as shown in Figure 4-4. The motor in the
PuriCare Series Procedure Station is an electronically commutated motor
(ECM). The ECM is a brushless DC motor that includes its own power
supply to convert the incoming alternating current to direct current, as well as
its own microprocessor to control and measure the motor’s operation. The
motor is preprogrammed to deliver a consistent volume of air, even as the
filters load over time.
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Figure 4-4