Owner's Manual

EcoInsight Thermostat Installation Guide
3
Section 3: Wiring
Thermostat Backplate
• R (Power) is used for the main power supply.
o For high voltage installations, be sure to follow high-voltage safety procedures such as making sure
that the thermostat is inside an electrical box.
• C (Common) is used to connect the common wire.
• AUX (Auxiliary) connector can be used for several purposes, such as lighting control or a third fan speed.
• W1 (Heat)(Strip) is used for the Heat control.
• Switched Power 1 (W1/Y1) will connect to R as a same-voltage power supply, but is available as an
alternate voltage power supply if needed.
• Y1 (Cool)(Comp) will be used for cooling.
• G (Fan) will be used for the first fan speed, or the only speed when there is a single fan speed.
• (B)(G2)(Y2)(Changeover) is most often the second fan speed, but occasionally used to power a heat pump.
• Switched Power 2 (G/O/W2) is usually jumped to Switched power and/or R, but can be another alternate
power supply voltage.
• W2 (Y2)(G2)(G3)(Multi-speed) can be used for a second or third fan speed.