User's Manual
58
Installation Instructions
Sample Wiring Diagrams
 with Dip Switch Positions
Conventional Heating and Cooling Systems
Residential & Commercial 1 Stage Heating 
with no Fan. 
2 Wire, Heat Only
The thermostat will not work with 
2 wires. Either pull new wire or 
purchase a model TSTATGAC-2W 
two-wire kit
Residential & Commercial 1 Stage Cooling. 
4 Wire, Cool Only
R 
C 
Y1 
G 
Residential & Commercial 1 Stage Cooling, 
with 1 stage Gas Heat. 
5 Wire, 1 Stage Cooling, 1 Stage Heat
24VAC Power
24VAC Common
1st Stage Heat
1st Stage Cool
Fan
Residential & Commercial 1 Stage Cooling, 
with 1 stage Electric Heat. 
5 Wire, 1 Stage Cooling, 1 Stage Heat
24VAC Power
24VAC Common
1st Stage Heat
1st Stage Cool
Fan
Residential & Commercial 2 Stage Cooling, 
with 3 stage Gas Heat. 
8 Wire, 2 Stage Cooling, 3 Stage Heat
24VAC Power
24VAC Common
1st Stage Heat
2nd Stage Heat
3rd Stage Heat
1st Stage Cool
2nd Stage Cool
Fan
R
C
W1/O/B
Y1
G
R
C
W1/O/B
Y1
G
R 
C 
W1/O/B 
W2 
W3/AUX 
Y1 
Y2 
G 
24VAC Power
24VAC Common
1st Stage Cool
Fan
GAS/EL HP
O
GAS
B
ELEC
GAS/EL
123
ON
HP
O
GAS
B
ELEC
GAS/EL HP
O
GAS
B
ELEC
GAS/EL HP
O
GAS
B
ELEC
GAS/EL HP
O
GAS
B
ELEC
123
ON
Residential & Commercial 1 Stage Heating 
with no Fan. 
3 Wire, Heat Only
24VAC Power
24VAC Common
1st Stage Heat
R 
C 
W1/O/B 
GAS/EL HP
O
GAS
B
ELEC
123
ON
123
ON
123
ON
123
ON
123
ON










