Ecoer EG910L - Page 4

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ESI Quick Start-up Guide
www.ecoer.com
01.2021Manufacturer reserves the right to change specifications or designs without notice.
Wiring Diagrams
ESI with Electric Heat Back-up + Other Brand Thermostat
R C
G
W1
W
O
Y
C
W2
Other 2-Stage
Thermostat
Optional
C
RH
RC
O
W1
G
Y1
W2
Y2
G2
R C
G
W1
W
O
Y
C
G2
G2
Optional
C
RH
RC
O
W2
G
Y1
W2
ESI with Electric Heat Back-up + EST01 (Type 9)
Refer thermostat install guide to hook up W1 and W2