18

WIRING DIAGRAMS

8

TypicalLennox HP19, HP20 Heat Pumps

THERMOSTATTERMINAL BLOCK
HEATPUMPPCB
R
V-VR
M
Y
E
F
R
X
Y1 Y2 W2 E GO B L C

TypicalLennox Heat Pumps (also see other Lennox diagrams)

THERMOSTATTERMINAL BLOCK
HEATPUMPPCB
R
R
Y
W1
E
G
O
L
C
Y1 Y2 W2 E G O B L C

TypicalLennox HP21 Heat Pump

THERMOSTATTERMINAL BLOCK
HEATPUMPPCB
R
R-VR
Y1
W1
E
F
O
L
X
Y1 Y2 W2 E G O B L C
cont.
19

TypicalLennox HP22 Heat Pump

THERMOSTATTERMINAL BLOCK
HEATPUMPPCB
R
R-VR
M
Y2
Y
E
F
R
X
L
Y1 Y2 W2 EGO B L C

TypicalWeathertron Heat Pumps

THERMOSTATTERMINAL BLOCK
HEATPUMPPCB
R
R
Y
W-U
G
O
B
T
X2
Y1 Y2 W2 E GO B L C

TypicalTrane Heat Pumps

THERMOSTATTERMINAL BLOCK
HEATPUMPPCB
R
R
Y
W
X2
G
O
F
B
Y1 Y2 W2 E G O B L C
CAPPED
CAPPED
User
Supplied
Jumper
WIRI NG DIAGRA MS
8cont.