Installation Guide

9
Figure 9: Side view of FILTERSCAN WiFi monitor
8. IMPORTANT! Set the Upstream/Downstream switch shown in Figure 10 so that it matches
the FILTERSCAN WiFi Home Air Filter Monitor’s position with respect to the air filter (that
is, OFF for upstream mounting or ON for downstream or differential mounting). Please see
the APPENDIX for 'Various HVAC Configurations for Monitor Installation' configurations.
Figure 10: Inside of the FS-245-C FILTERSCAN WiFi monitor
15 to
24V AC
Do not connect
Color 1
Color 2
AC/DC
AC/DC