Ecobee EB-STATe3-02 Instruction Manual download pdf (Page 7)

Terminal descriptions

G Fan

Rc Cool transformer

Rh Heat transformer

O/B Heat pump reversing valve

Y Y1, Y2: Used for 1 - 2 stages of conventional A/C

or 1 - 2 stages of heat pump compressor

W W1, W2: Used for 1 - 2 stages of conventional heat

or 1 - 2 stages of auxiliary heat with heat pump

C 24VAC common

ACC Accessory (+/-): Used for dehumidiﬁers,

humidiﬁers, ventilators, HRVs or ERVs

Warning! ecobee3 is designed for 24VAC with a 2A

maximum current. Do not connect it to line (high)

voltage or millivolt systems.

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Ecobee EB-STATe3-02 Instruction Manual Page 7