Lennox 12HPB Series Installation Instructions Manual page 5

12HPB and Blower Unit
Thermostat Designations
(Some connections may not apply.
Refer to specific thermostat and indoor unit.)
Indoor
Thermostat
Unit
power
R R
common
C
C
1st. stage aux. heat
W1
W1
W2
W3
indoor blower
G G
reversing valve
O
compressor
Y1
Figure 5
Typical Wiring Field Wiring Diagram
*
*
Figure 4
Outdoor
Unit
power
R
common
C
1st. stage aux. heat
W1
O
Y1
Page 5
* may be optional
Outdoor Unit and Blower Unit
Thermostat Designations
(with emergency heat)
(Some connections may not apply.
Refer to specific thermostat and indoor unit.)
Indoor
Thermostat
Unit
power
R
common
C
emergency heat
E
W1
W1
1st. stage aux. heat
W2
W3
indoor blower
G
reversing valve
O
compressor
Y1
Figure 6
Outdoor
Unit
power
R
R
common
C
C
em.
heat rly
outdoor t'stat
W1
1st. stage aux. heat
G
O
Y1