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5
T
yp
ical heat
p
um
p
with cool active reversin
g
valve and auxiliar
y
/emer
g
enc
y
heat.
T
yp
ical heat
p
um
p
with heat active reversin
g
valve and auxiliar
y
/emer
g
enc
y
heat.
T
yp
ical heat
p
um
p
with cool active reversin
g
valve and auxiliar
y
/emer
g
enc
y
heat.
Does not have se
p
arate wire for emer
g
enc
y
heat
(j
um
p
W2 & E
)
.
T
yp
ical heat
p
um
p
with cool active reversin
g
valve, auxiliar
y
/emer
g
enc
y
heat
and second sta
g
e of coolin
g
. S
y
stem fault indicator connected
(
L terminal
)
.
OB
9420 WIRING SAMPLE #1
Y1 E G W2CLRY2
9420 WIRING SAMPLE #2
CLRY2Y1EGW2OB
9420 WIRING SAMPLE #3
BY1 E G W2CL O
EG
RY2
Jumper
OB
9420 WIRING SAMPLE #4
CW2LRY2Y1
◆ Wiring Diagrams