
6
Installer Guide
Humidification or Dehumidification
Humidification
System
DEHUM/
HUM
Dehumidification Terminal
on Equipment
Dry Contact and Aux Output
12
11
10
9
8
7 6 5
4
3
2
1
Accessory control such
as a Sprinkler System
Accessory such as a
Time Clock or door switch
R
C
AUX
DEHU
M
HUM
W3
W2
W1/O/B
G
Y1
Y2
REMOTE
/
OUTDOOR
DRY CONTAC
T
R
C
AU
X
DEHU
M
HU
M
W3
W2
W1/O/B
G
Y1
Y2
REMOTE
/
OUTDOOR
DR
Y
CONTAC
T
Ventilation control
Residential & Commercial
Heat Pump
with
O Reversing Valve
5 Wire, 1 Stage Cooling, 1 Stage Heat
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
G Fan
Residential & Commercial
Heat Pump
with
O Reversing Valve.
8 Wire, 2 Stage Cooling, 4 Stage Heat
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
Setup Step 31 is set to 2
(Number of Compressor Stages)
Residential & Commercial
Heat Pump
with
O Reversing Valve
6 Wire, 1 Stage Cooling, 2 Stage Heat
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
W2 Aux Heat
G Fan
Residential & Commercial
Heat Pump
with
O Reversing Valve.
7 Wire, 2 Stage Cooling, 3 Stage Heat
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
Setup Step 24 is set to 2
(Number of Compressor Stages)
1
GAS
O
GAS/EL
ELEC
B
HP
ON
23
1
GAS
O
GAS/EL
ELEC
B
HP
ON
23
1
GAS
O
GAS/EL
ELEC
B
HP
ON
23
1
GAS
O
GAS/EL
ELEC
B
HP
ON
23
Heat Pump Systems with Dual Fuel
Dry Contact and Aux Output
12
11
10
9
8
7 6 5
4
3
2
1
Accessory
such as
Time Clock
or door switch
R
C
W2 W3 HU
M
DEHUM AU
X
W1/O/B
G
Y1
Y2
REMOTE/ OUTDOO
R
DRY CONTACT
PSP4273_Installer man.indd 6
PSP4273_Installer man.indd 6
6/9/21 11:23 AM
6/9/21 11:23 AM