Bryant TSTATBBNQ001 User's Information Manual page 16

Sample Wiring Diagrams
2 Wire, 1 Stage Gas Heat
POWER
GAS OR
ELECTRIC HEAT
W
Y
B
O
G
R
Page 15
Residential Gas or Millivolt units.
2 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.