AFA4000/1 Airflow Monitor / p.65
6.4 Sash light curtain
The Sash Light Curtain consists of three main components and associated wiring:
• Sash Light Curtain Control Box
• LED Transmitter
• LED Receiver
The Sash Light Curtain Control Box is connected to the main Auto Sash Control Unit.
6.4.1 Installing the sash light curtain control box
1. Fix the Sash Light Curtain Control Box onto the top of the fume hood, using the tabs
attached to the control box and the screws provided. Ensure that there is access to
the terminals to connect the wiring.
Figure 38: Sash Light Curtain Control Box
2. Use the pre-assembled cables and connectors supplied to connect the Light Curtain
Control Box to the Auto Sash Control Unit. See the wiring schematic in section 6.10
and Figure 31.
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