22
Possible Wires What They Control
R or V or VR RH and RC Single power for HEAT and COOL
RH or 4 RH Power for HEAT (RH not connected to RC
jumper clip removed)
RC RC Power for COOL (RH not connected to RC
jumper clip removed)
W W 1st stage HEAT or 1st stage auxiliary heat
W2 W2 2nd stage HEAT or 2nd stage auxiliary heat
W3 W3 3rd stage HEATING
Y Y COOL control or 1st stage compression for heat pump
Y2 Y2 2nd stage COOL control or 2nd stage compression
for a heat pump
G or F G FAN control
C or X C 24VAC power (to power thermostat)
NOTE: TRANE uses B for this connection
H H External Humidifier
DH DH External De-Humidifier
B B Heat pump changeover (cool to heat, powered
in heat) For more details see B/O
O O Heat pump changeover (heat to cool, powered
in cool) For more details see B/O
B/O IMPORTANT: If there are both B and O wires (Trane
and American Standard heat pump products) DO NOT
CONNECT B to B terminal. Instead, connect B to C
terminal. If not a Trane or American Standard product,
tape off B.
E n/a Emergency heat (do not connect, tape off)
L n/a System monitor (do not connect, tape off)
T n/a Outdoor sensor (do not connect, tape off)
Wiring Reference Table
RH
RH
RC
W
W2
A
Y
Y2
G
C
A
A
O/B
O/B
O/B
Element
Terminal
Vivint Element Installation Guide
Wiring Diagrams
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