FloAire PCU Filtration - Manual (Page 9)

9
Air Pressure Switch Option
Switches are preset from plant to .15” w.c. above the internal static pressure of the PCU with clean filters.
Air pressure switch is located in downstream filter module. Route wiring from hood control panel to PCU
using ½” conduit through quick seal located near lower right area of filter module containing switch. Use
existing conduit in module to route wires from exterior of module to switch. Install wiring according to
label above switch. Be sure all conduit fittings are tight. Once filters become clogged, switch closes
illuminating light in kitchen. User should then clean or replace filters as required.