Bryant TSTAT Installation And Start-Up Instructions Manual page 6

DUAL FUEL
TWO-STAGE OR
VARIABLE SPEED
THERMOSTAT
FURNACE
R
24 VAC HOT
G
FAN
FURNACE
W/W1
COMPRESSOR
Y/Y2
HI
RVS COOLING O/W2
COMPRESSOR Y1/W2
LO
C
24 VAC COM
RVS HEATING
B
RVS SENSING
L
OUTDOOR
S1
SENSOR
CONNECTION
S2
Fig. 5—Two-Stage or Variable-Speed Furnace with
2-Speed Heat Pump
WIRING DIAGRAM NOTES:
1. Underlined letter on dual terminal indicates its usage.
For Example: O/W2 means O, O/W2 means W2.
Outdoor Temperature Sensor must be attached in all dual
fuel installations.
Jumper wire between O/W2 and L thermostat terminals
MUST be present.
2. Y1 and O connections to 2-stage furnaces MAY NOT
EXIST, or may be only a wire rather than a screw terminal.
TWO-SPEED
HEAT PUMP
R
R
G
W2
W/W1
Y/Y2
Y2
O
O
Y1
Y1
W2
W3
C
C
SEE NOTES 1 AND 2
OUTDOOR
TEMPERATURE
SENSOR
A95218
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