![](http://pdfasset.owneriq.net/9/9e/99e091f3-bb91-44ff-963d-5befc707ecfe/99e091f3-bb91-44ff-963d-5befc707ecfe-bg24.png)
36-37
WIRING DIAGRAMS
5-wire Heat/Cool System
X - No Connection
THERMOSTAT
G
W
Y
RHRC
Heat Relay
or Valve
Heat
24V Supply
Fan
Relay
Cool
Contactor
Cool
24V Supply
THERMOSTAT
G
W
Y
RHRC
Heat/Cool
24V Supply
Fan
Relay
Heat Relay
or Valve
Cool
Contactor
Jumper
4-wire Heat/Cool System
X
O/B
X
O/B
B99A p30-40 2/7/03 9:59 AM Page 7