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Two-State Constant Volume
Fume Hood Controller
Owner’s Manual
125-5033 Rev. AA, September 2007
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Rev. AA, September 2007 NOTICE The information contained within this document is subject to change without notice and should not be construed as a commitment by Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. assumes no responsibility for any errors that may appear in this document. All software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license. WARNING This equipment generates, us
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Table of Contents How To Use This Manual ............................................................................................. VII Manual Organization ................................................................................................. VII Manual Conventions .................................................................................................. VII Manual Symbols ............................................................................................
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Applications .................................................................................................................. 11 Fume Hood Controller: 2-Position Constant Volume ............................................... 11 Basic Operation ............................................................................................................ 12 High and Low Exhaust Flow Control ......................................................................... 12 Control Loops ..........
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How To Use This Manual This section covers manual organization, conventions, and symbols used in the manual, and other information that will help you understand and use a Laboratory Room Controller — Electronic Output. Manual Organization This manual contains the following sections: • Chapter 1 Product Overview describes the hardware components and the accessories that are used with the controller. • Chapter 2 Applications describes the control applications available in the controll
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Manual Symbols The following table lists symbols that are used to draw your attention to important information. Notation Symbol Meaning CAUTION: Indicates that equipment damage or loss of data may occur if the user does not follow a procedure as specified. WARNING: Indicates that personal injury or loss of life may occur to the user if a procedure is not performed as specified. Datamate Software Datamate is a customer software tool for all controller communications. There are tw
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1 Product Overview Introduction The Fume Hood Controller is an equipment controller designed to provide Direct Digital Control (DDC) for 2 position fume hoods. The controller consists of a controller board and a controller enclosure. The controller board (Figure 1) is the central computing/controlling component of the system. Related Equipment • Operator Display Panel (ODP) • Laboratory Exhaust Air Terminal • Venturi Air Valve • Differential Pressure Transmitter (See NOTE) • Air
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Fume Hood Controller Owner's Manual Table 1. Fume Hood Controller – Electronic Output Applications. Application Description 940 2 Position Fume Hood Controller Ordering Notes Fume Hood Controller – Electronic Output (940) 546-00750 Figure 1. Fume Hood Controller Board . 2 Siemens Building Technologies, Inc.
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Product Overview Hardware Inputs Analog • Differential pressure transmitter Digital • Operator Display Panel (ODP) • ATTN.UNATTN (through DI1) • OCC.UNOCC (through DI1) Hardware Outputs Analog • AO-E/AO-P module (Floating Control) • Operator Display Panel (ODP) • AO2 (Flow Signal, 1 to 10 Vdc) Digital • FLN communications trunk • DO3 (24 Vac, Alarm/Hi.Low Output) Power Wiring The controller is powered by 24 Vac. Power wiring connects to the three screw terminals on the controll
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Fume Hood Controller Owner's Manual FLN TRUNK +- S (SHIELD) (SHIELD) (-) (-) 24V COMMON (+) (+) 24V HOT GROUND Figure 2. Power Wiring. Figure 3. Communication Wiring. Controller LED Indicators The controller has six Light Emitting Diode (LED) indicators. See Table 2. Table 2. Controller LEDs. LED Type Label Indication (if present)* DO LED 1 - LED 3 Indicates the ON/OFF status of the DO associated with it. A glowing LED indicates that the DO is energized. Transmit TX Indicates, w
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Product Overview Pressing the Emergency Purge button a second time reverts the Fume Hood Controller to normal operation for the current conditions. HI/LO: HI/OFF Select button – Pressing this button changes the controller from a high flow setpoint to a low flow setpoint and back again or changes the controller from a high flow setpoint to and OFF state and back again. Auxiliary Button – The Auxiliary buttons are not used currently. For more information on the ODP, see the Fume Hood Contro
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Fume Hood Controller Owner's Manual The terminal is available in diameters ranging from 4 to 18 inches. The terminal is available in a variety of end configurations to match the ductwork construction. It is also available in ® TEFLON coated 18-gauge steel for highly corrosive environments. Figure 5. Laboratory Exhaust Air Terminal. Venturi Air Valves The Venturi Air Valve is a pre-packaged, easy to install airflow measurement and control station. See Figure 6. This assembly combines t
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Product Overview High Speed Electronic Actuation The High speed electronic actuator assembly consists of two parts, the electronic actuator and the interface board. The actuator is connected to the exhaust flow control device in the fume hood exhaust duct. The electronic actuator assembly is used because of its small size and quick response time. CAUTION: Due to the design parameters and the response time required by the Fume Hood Controller, the assembly must be replaced with the sam
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Fume Hood Controller Owner's Manual Low Speed Electronic Actuation Alternately, when speed of response is not an issue, slower speed electronic actuation may be used. This can be used when the change-of-state between High and Low can take place in 15 seconds or more. Low Speed Actuator (GMA13x). Pneumatic Actuation The pneumatic actuator is connected to an exhaust flow control device in the fume hood exhaust duct. The standard pneumatic actuator (Figure 8) used with the Fume Hood Con
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SUPPLY COMMON EXHAUST S R (SUPPLY) (ACTUATOR) 18-30 PSI Product Overview Figure 8. Pneumatic Actuator. Analog Output-Pneumatic (AO-P) Module The Analog Output-Pneumatic (AO-P) Module is an electric-to-pneumatic interface between the Fume Hood Controller and the pneumatic actuator. The AO-P Module translates electrical signals from the Fume Hood Controller into pneumatic signals that command the actuator. The AO-P Module consists of two industrial grade solenoids that supply or bleed air
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Fume Hood Controller Owner's Manual NOTE: While the pneumatic actuator is being commanded, you may hear a hissing or clicking sound coming from the AO-P module. This is due to the movement of the air valves and the bleeding of air from the actuator. This is normal operation. Differential Pressure Transmitter The differential pressure transmitter is used to send a signal that represents the velocity of air in the duct to the controller. The differential pressure transmitter receives the ve
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2 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, a
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Fume Hood Controller Owner's Manual Basic Operation The Fume Hood Controller provides Direct Digital Control (DDC) technology for controlling fume hood face velocities in a manifolded fume hood exhaust system. High and Low Exhaust Flow Control The Fume Hood Controller can operate at two different setpoints, described as HI flow and LOW flow setpoints. The low setpoint can be set to zero to send the controller into an OFF mode. The OFF mode shuts off the flow alarms and closes the exhaust
