Electrical Connections; Field Wiring - Trane 8B1A026M2PSAB Installer's Manual

Electrical Connections

Make wiring connections to the unit as indicated on enclosed wiring diagram. As with all gas appliances using electrical power, this furnace shall
be connected into a permanently live electric circuit. It is recommended that furnace be provided with a separate "circuit protection device"
electric circuit. The furnace must be electrically grounded in accordance with local codes or in the absence of local codes with the National
Electrical Code, ANSI/NFPA 70 , if an external electrical source is utilized. The integrated furnace control is polarity sensitive. The hot leg
of the 120V power supply must be connected to the black power lead as indicated on the wiring diagram.
Refer to the SERVICE FACTS literature and unit wiring diagram attached to furnace.

Field Wiring

Two Stage
Thermostat
Furnace
W1 W1
R
G
B
Y2 Y2
Y1 Y1
O
Two Stage
Thermostat
Furnace
W2 W2
W1 W1
R
G
B
Y2 Y2
Y1 Y1
O
HP
18-CE14D1-1A-EN
FIELD WIRING DIAGRAM FOR S8B1 / S8X1 SINGLE STAGE
HEATING THERMOSTAT, ONE / TWO STAGE AC OR HEAT PUMP
Outdoor Unit
(No Transformer)
X2
HP
R
R HP
B
G
Y2
B
Y1
O
HP
FIELD WIRING DIAGRAM FOR S8X2 TWO STAGE
HEATING THERMOSTAT, ONE / TWO STAGE AC OR HEAT PUMP
Outdoor Unit
(No Transformer)
X2
HP
R
HP
R
B
G
Y2
B
Y1
O
HP
O
F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n
NOTES:
1) HP = Wiring used for Heat Pump systems.
2) Y1 and/or Y2 must connect from the thermostat to the IFC
for proper airflow.
3) A/TCONT824 thermostats do not require the use of X2.
4) Y2 not available for S8B1.
NOTES:
1) HP = Wiring used for Heat Pump systems.
2) Y1 and/or Y2 must connect from the thermostat to the IFC
for proper airflow.
3) Remove Y1 - O jumper on IFC for HP systems.
4) If the thermostat does not have W2, or there are not enough
conductors jumper W1 to W2 at the IFC.
5) A/TCONT824 thermostats do not require the use of X2.
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