32
GRc Rh W
Heat 24V
Supply
Heat Relay
or Valve
X
Jumper
3-wire Heat Only System
Fan
Relay
GRc Rh W
Heat 24V
Supply
Heat Relay
or Valve
X
Jumper
3-wire Heat Only System
Fan
Relay
GRc Rh Y
Cool
Contacter
Cool 24V
Supply
X
Jumper
3-wire Cool Only System
Fan
Relay
GRc Rh Y
Cool
Contacter
Cool 24V
Supply
X
Jumper
3-wire Cool Only System
Fan
Relay
Wiring diagrams, cont.