TEL AFA4000/E - Page 86

AFA4000/E VAV Airflow Controller / p.86
Figure 51: Sash low micro-switch wiring schematic
6.6.2 Installing the Sash Low proximity switch
The Sash Low Proximity Switch is an inductive switch that operates when it comes within range
of a metal plate attached to the sash, i.e. when the sash is closed.
The type of switch selected makes or breaks the circuit when the sash is closed. Typically, the
switch would be fitted so that the switch is closed when the sash is open.
Connect the Sash Low Proximity Switch to the Auto Sash Control Unit (Figure 52). See the wiring
schematic in section 6.9 and Figure 52.
Figure 52: Sash low proximity switch wiring schedule