8
5
SC
8-2. Electrical Wirin
g
B1
I
n
door
un
it PCB
CRV
(CN91: WHT)
2P termi
n
al ba
s
e
I
n
door
un
it
S
y
s
tem co
n
troller
Acce
ss
ary co
nn
ector
Wire joi
n
t co
nn
ectio
n
B2
B
3
B4
B5
B6
U1
U2
How to connect electrical wirin
g
(1)
Co
nn
ect B1, B2 to i
n
door PCB CRV co
nn
ector
us
i
ng
acce
ss
ary 2P co
nn
ector. (*No polarity)
Total wire le
ng
th i
s
le
ss
tha
n
9
8
5 ft. a
n
d
s
ize i
s
AWG#1
8
.
(2)
Co
nn
ect B5, B6 to i
n
door
un
it 2P termi
n
al ba
s
e.
(*No polarity). Wire
s
ize i
s
AWG#1
8
.
Ba
s
ic wirin
g
B1:
B2:
B
3
:
Not be
us
ed
B4:
A
u
xiliary of i
n
ter-
un
it co
n
trol wiri
ng
B5:
B6:
Terminal
s
for remote monitorin
g
A1:
I
n
p
u
t for t
u
r
n
i
ng
o
n
air co
n
ditio
n
er
s
co
n
c
u
rre
n
tly.
A2:
I
n
p
u
t for t
u
r
n
i
ng
off air co
n
ditio
n
er
s
co
n
c
u
rre
n
tly.
A
3
:
Commo
n
i
n
p
u
t for t
u
r
n
i
ng
air co
n
ditio
n
er
s
o
n
or off.
A4:
ON operatio
n
s
tate i
n
dicator o
u
tp
u
t.
A5:
Alarm i
n
dicator o
u
tp
u
t.
A6:
Commo
n
i
n
dicator o
u
tp
u
t.
Ba
s
ic wirin
g
dia
g
ram of control wirin
g
A max. of 64 i
n
door
un
it
s
a
n
d
3
0 o
u
tdoor
un
it
s
ca
n
be co
nn
ected i
n
1
s
y
s
tem.
Up to 10
s
y
s
tem co
n
troller
s
ca
n
be co
nn
ected
i
n
1
s
y
s
tem.
Fi
g
. 8-3
Power
su
pply: DC12V *No polarity
To CRV co
nn
ector (CN91) o
n
i
n
door PCB
I
n
ter-
un
it co
n
trol wiri
ng
. (Low volta
g
e)
To i
n
door
un
it 2P termi
n
al ba
s
e (U1, U2)
*No polarity
I
n
ter-
un
it
co
n
trol wiri
ng
S
y
s
tem co
n
troller
RC1
1-1
RC2
RC
3
2-1
3
-1
Fi
g
. 8-4
A1
<Back
s
ide of
s
y
s
tem co
n
troller>
A2
A
3
A4
A5
A6
B6
B5
B4
B
3
B2
B1
05-354-1 PAC-i_II 2/13/06 6:37 PM Page 85