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WIRING DIAGRAMS
4-wire Heat/Cool System
5-wire Heat/Cool System
Jumper
Wallplate
Terminals
Fan
Relay
Cool
Contactor
Heat Relay
or Valve
24V Supply
Heat/Cool
Rh
Rc
Y/O
W/B
Y1
G
X
X
System
Selector
STD
HP
–
No Jumper
Wallplate
Terminals
Fan
Relay
Cool 24V
Supply
Heat Relay
or Valve
Heat 24V
Supply
Rh
Rc
Y/O
W/B
Y1
G
Cool
Contactor
X
System
Selector
STD
HP
–
X - No Connection