Source 1 S1-TBSU22HN Owner's Manual And Installation Instructions page 18

Installation Instructions
Explanation of Thermostat Jumpers
Jumpers are located on the back of the thermostat
GAS/ELEC RV=O GAS
J1 J2 J3
HEATPUMP RV=B ELEC
GAS/ELEC GAS/ELEC
This jumper configures the thermostat to control a conventional
gas/electric system or a heat pump. If your system is anything
J1
OR
other than a heat pump, leave this jumper set for GAS/ELEC.*
HEATPUMP HEATPUMP
*For some commercial heat pumps, this jumper will need to
be set for GAS/ELEC. Consult the commercial heat pump literature.
RV=O RV=O When J1 is configured to control a heat pump, this jumper (J2)
must be set to control the appropriate reversing valve. If RV=O
J2
OR
is chosen, the W1/O/B terminal will energize in cooling. If RV=B
is chosen, the W1/O/B terminal will energize in heating.
RV=B RV=B
When J1 is set for GAS/ELEC:
GAS GAS
This jumper (J3) controls how the thermostat will control the
J3
Fan (G) terminal in heating mode. When GAS is chosen, the
OR
thermostat will not energize the Fan (G) terminal in heating.
When ELEC is chosen the thermostat will energize the fan in
ELEC ELEC
heating.
GAS/ELEC
J1 J2
HEATPUMP
C
AUX
OUTDOOR
SENSOR
REMOTE
SENSOR
DRY
CONTACT
Page 10
RV=O GAS
J3
RV=B ELEC
R
G
W1/O/B
W2
Y1
Y2
W3
HUM
DEHUM