Ventilator (2-Wire Set Up): Step 2 Diagram - Ecobee ecobee4 Install Manual

VENTI L ATOR (2-WI RE SETUP)
Step 2: Wire the ventilator as shown below.
NOTE
During setup, select 2-wire (ACC+, ACC-) accesory on the
thermostat screen.
R G (HI/LO)
ERV/HRV
R
H
C
W1
W2
ACC-
ACC+