Lennox Merit 10HPB Series Installation Instructions Manual page 5

10HPB 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
10HPB and Blower Unit
Thermostat Designations
(with auxiliary heat)
(Some connections may not apply.
Refer to specific thermostat and indoor unit.)
Indoor
Thermostat
Unit
power
R
R
common
C C
emergency heat
E
1st. stage aux. heat
W1 W1
W2
W3
indoor blower
G G
reversing valve
O
compressor
Y1
Figure 6
*May be optional
Outdoor
Unit
power
R
common
C
1st. stage aux. heat
W1
O
Y1