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LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The "R" terminal is the hot terminal and the "C"
terminal is grounded.
"G" terminal or pins 6 and 1 of P2 are the fan inputs.
Both must be energized for proper fan operation. This
is done automatically in the factory installed climate
control options. If the climate control option is
abandoned and connections are made directly to P2 both
pins 6 and 1 of P2 must be energized for proper
operation.
"Y" terminal or pin 7 of P2 is the compressor input.
"B" terminal or pin 8 of P2 is the reversing valve input.
The reversing valve must be energized for heating
mode.
"R" terminal or pin 10 of P2 is 24 VAC hot.
"C" terminal or pin 11 of P2 is 24 VAC grounded.
"L" terminal or pin 12 of P2 is compressor lockout
output . This terminal is activated on a high or low
pressure trip by the compressor control module. This
is a 24 VAC output.
VIEWED FROM PIN END
Manual 2100-419E
Page
20 of 48
"W2" terminal or pin 9 of P2 is second stage heat (if
equipped). If the unit is equipped with an optional hot
water coil plenum box the water valve will be connected
to this terminal.
"O1" terminal of pin 5 of P2 is the ventilation input.
This terminal energizes any factory installed ventilation
option.
FIGURE 14
BLOWER MOTOR LOW VOLTAGE
WIRE HARNESS PLUG
MIS-1285
L
O
W
V
O
L
T
A
G
E
C
O
N
N
D
D
C
C
O
N
T
F
a
n
O
n
y l
C
o
o
n i l
g
M
o
d
e
H
e
t a
P
u
m
p
H
e
t a
n i
g
2
n
d
S
a t
g
e
H
e
t a
n i
g
f i (
e
m
p
o l
e y
) d
V
e
i t n
t a l
o i
n
VIEWED FROM PIN END
E
C
T
O I
N
S
F
O
R
R
O
L
E
n
r e
i g
e z
G
E
n
r e
i g
e z
, Y
G
E
n
r e
i g
e z
, Y
, G
B
E
n
r e
i g
e z
, G
W
2
E
n
r e
i g
e z
, G
O
1
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