HPT18-60 wire connections are:
Y --> Yellow
G --> Green
R --> Red
O --> Orange
W2 --> White
E --> black
C --> blue

Connecting on RTH3100C:

E --> black
Aux --> White
Y --> Yello
G --> Green
O --> Orange
L -->
R --> Red
B --> Black
C --> Blue

Change setup to 9 for electric Furnace but furnace is not kickiing. Any idea?