Heat Pump Systems - Daikin DT4273C Owner's Manual & Installation Manual

Installation Instructions
Sample Wiring Diagrams

Heat Pump Systems

5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial Heat Pump with
'O' Reversing Valve
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
G Fan
GAS/EL
O
GAS
7 Wire, 2 Stage Cooling, 3 Stage Heat
Residential & Commercial Heat Pump with
'O' Reversing Valve.
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
GAS/EL
O
GAS
(Number of Compressor Stages set to 2)
HP
B
ELEC
HP
B
ELEC
with Dip Switch Positions
6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential & Commercial Heat Pump with
'O' Reversing Valve
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
W2 Aux Heat
G Fan
GAS/EL
O
GAS
8 Wire, 2 Stage Cooling, 4 Stage Heat
Residential & Commercial Heat Pump with
'O' Reversing Valve.
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
W3 4th Stage Heat
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
GAS/EL
O
GAS
(Number of Compressor Stages set to 2)
80
HP
B
ELEC
HP
B
ELEC