NuAire LabGard ES NU-565-400, Operation & Maintenance Manual

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OM0301
August 20 Page 22 of 105
6.0 Operating the NU-565
6.1 Biosafety Fume Hood/Cabinet Control
6.1.1 Overview
The Biosafety Fume Hood/Cabinet Control (BSCC) system is designed to service the control requirements of the
NU-565 Biosafety Fume Hood/Cabinet. The control system is a self-contained microprocessor driven module that
will perform the following functions:
• Easy use interface via
TOUCHLINK
color LCD.
• Control blower DC ECM Motor via solid-state DC Motor Controller that provides automatic compensation
(constant volume control) for both filter loading and line voltage variances.
•
Intelliflow™ - Fast, accurate, reliable dual thermistor, airflow sensors and digital differential velocity
pressure flow grid powered by TSI to control and monitor cabinet airflows to setpoints.
• Control lights via solid state switch.
• Control outlets via solid state switch.
• Display date/time w/battery backup.
• Display blower and optional UV light run timers.
• Display alarm setpoints high/low for error conditions (downflow/inflow).
•
Display complete calibration, option menu and diagnostic functions.
The NU-565 BSCC system offers the latest digital microprocessor design technology for improved cabinet
performance and safety. The control system uses a digital dual thermistor airflow sensor in the downflow stream
to monitor and control airflow to setpoints. The control system automatically compensates for filter loading,
voltage variances and other environmental effects. A digital differential velocity pressure glow grid in the exhaust
airstream monitors for exhaust volume and subsequent inflow velocity. Downflow velocity, exhaust volume and
inflow velocity are displayed on the
TOUCHLINK
LCD screen. The control system also monitors the sliding window
position with a micro switch for both window height and window closed positions.
The control system through the use of the front panel controls the on/off function of the fluorescent and
ultraviolet lights (optional), outlets and DC ECM motor/blower. The control system also allows contact closure
outputs for interaction with HVAC systems to optimize environmental performance.
User interface to the BSCC system is accomplished via the TOUCHLINK LCD. Basic use of the LFBSC is accomplished
via the icons located along the top of the screen as shown below. Touch an icon to turn on/off functions as
indicated. Each icon will illuminate with color to indicate when the function is turned on. The menu icon will
always prompt a menu screen to display. Selecting a menu item will continue the prompts until the desired
parameter is achieved. To return to the main menu, press the MENU icon repeatedly to reverse out of the
parameter menus.