Hunter 40170 Installation And Operation Manual page 30

4-wire Heat/Cool System
Jumper
G Rc
X
Fan
Heat/Cool
Relay
24V Supply
5-wire Heat/Cool System
Rc
G
Fan
Cool
Relay
24V Supply
Rh
Y
W
Cool
Heat Relay
Contactor
or Valve
Rh
Y
Cool
Heat
Contactor
24V Supply
0
W
Heat Relay
or Valve