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2-wire Heat Only
Jumper
X
X
X
Wallplate
Terminals
Rh
Rc
Heat 24V or
Millivolt Supply
HeatRelay
orValve
X
Y/O
W/B
Y1
G
System
Selector
STD
HP
–
X - No Connection
Single-stage
Heat Pump
Jumper
X
OR
Heat
Mode
Cool
Mode
Connect to Proper Reversing
Valve Terminal.
System
Selector
STD
HP
–
Wallplate
Terminals
Rh
Y/O
W/B
Rc
G
Fan
Relay
Reversing
Valve
Compressor
Contactor
Y1
Heat Pump
24V Supply
wiring diagrams, cont.