User Manual

Table Of Contents

Application Note #480

19 Technical Support — 800.523.9466

Two-Location Applications Using an Existing Switch

Settings

An existing 3-way mechanical switch may be used as a second-location control to activate lighting load from either location

after a simple rewire. Additional programming is required to work with a mechanical switch and can be found on page 20.

If using Companion Dimmer(s) for a 3-way application, additional programming is not required.

Wiring Prerequisites: 3-Way Wiring (Using 3-Way Mechanical Switch)

Note: Diagrams are for reference only. Refer to instruction sheet for proper wiring procedures.

WARNING: Shock Hazard. May result in serious injury or death. Turn OFF power at circuit breaker before installing

the unit.

Notes:

– Rewiring of existing switch is required; consult the instruction sheet for installation procedures.

– If switch is not rewired, it may result in abnormal behavior; consult your instruction sheet for wiring procedure.

– If the existing mechanical switch was rewired but the Two‑Location Applications Using an Existing Switch setting is

not changed to select the appropriate second location device, the Maestro® Sensor Dimmer may react abnormally. To

resolve, change this setting to the appropriate device.

Dimmer Line Side

Lighting Load

Neutral

Live

Different Color Screw

Black

No connection

Brass

Maestro®

Sensor Dimmer

3-Way Mechanical Switch

Blue

120 V~ 60 Hz

Ground

Dimmer Load Side