Siemens 125-5033 Manuel du propriétaire - Page 19

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1. Venturi Air Valves
2. Applications

Applications

Fume Hood Controller: 2-Position Constant Volume

Application 940 is designed for use with a constant volume or two-position fume hood in a

manifold fume hood exhaust system. In this application, two position fume hoods have an

individual exhaust damper or venturi air valve connected to a central fan. The application

modulates the exhaust flow control device to maintain a high or low flow setpoint based on

inputs from the ODP (Operators Display Panel), Digital Input, an exhaust airflow sensor, and

the controller setpoints (Figure 10).

Siemens Building Technologies, Inc.

Figure 10. Application 940 Control Drawing shown using a damper.