Sample Wiring Diagrams - Daikin DT4273C Owner's Manual & Installation Manual

Installation Instructions

Sample Wiring Diagrams

Conventional Heating and Cooling Systems
2 Wire, Heat Only
Residential & Commercial 1 Stage Heating
with no Fan.
The thermostat will not work with
2 wires. Either pull new wire or
purchase a model TSTATGAC0410
two-wire kit
GAS/EL
O
GAS
4 Wire, Cool Only
Residential & Commercial 1 Stage Cooling.
R 24VAC Power
C 24VAC Common
Y1 1st Stage Cool
G Fan
GAS/EL
O
GAS
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling,
with 1 stage Electric Heat.
R 24VAC Power
C 24VAC Common
W1/O/B 1st Stage Heat
Y1 1st Stage Cool
G Fan
GAS/EL
O
GAS
HP
B
ELEC
HP
B
ELEC
HP
B
ELEC
with Dip Switch Positions
3 Wire, Heat Only
Residential & Commercial 1 Stage Heating
with no Fan.
R 24VAC Power
C 24VAC Common
W1/O/B 1st Stage Heat
GAS/EL
O
GAS
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling,
with 1 stage Gas Heat.
R 24VAC Power
C 24VAC Common
W1/O/B 1st Stage Heat
Y1 1st Stage Cool
Fan
G
GAS/EL
O
GAS
8 Wire, 2 Stage Cooling, 3 Stage Heat
Residential & Commercial 2 Stage Cooling,
with 3 stage Gas Heat.
R 24VAC Power
C 24VAC Common
W1/O/B 1st Stage Heat
W2 2nd Stage Heat
W3/AUX 3rd Stage Heat
1st Stage Cool
Y1
Y2 2nd Stage Cool
G Fan
GAS/EL
O
GAS
79
HP
B
ELEC
HP
B
ELEC
HP
B
ELEC