68
Installation & Operation Manual
10
Ladder diagram
LBL20083 REV B
CN5
-1
1
X6
-1
X6
-1
3
CN5
-5
L
O
UVER REL
A
Y
CN4
-5
X3
-1
CN4
-6
X3
-2
CO
NNECT
IO
N
BO
ARD 1
X6
-7
CN5
-1
RUNT
IM
E
CO
NT
ACT
S
X6
-1
6
CN5
-7
X6
-2
CN5
-8
X1
3
-1
CN5
-9
X6
-6
CN5
-3
X6
-1
5
CN5
-1
0
X6
-1
1
CN5
-1
2
X6
-1
4
CN5
-4
X8
-5
CN6
-4
X6
-1
0
X8
-1
5
CN6
-9
X7
-8
CN6
-5
X7
-4
CN6
-1
0
X8
-7
CN6
-7
X8
-1
7
CN6
-3
X8
-6
CN1
-7
3
W
A
Y
VAL
V
E
CO
NNECT
IO
N BO
ARD 1
ST
AG
E 1
/
ENABL
E
ST
AG
E 2
ST
AG
E 3
ST
AG
E 4
TA
N
K
TS
TA
T
LOU
V
E
R
P
R
OV
IN
G
OP
E
N
24V
C
O
M
CL
O
S
E
+
-
+
-
A
B
0-1
0
V
RAT
E
OU
T
P
U
T
CASCADE
0-1
0
V
BM
S
INP
U
T
CN5
-6
X8
-1
9
CN1
-5
X8
-1
4
CN1
-6
X8
-1
3
CN1
-2
OU
T
D
OOR
SENSO
R
S5
2
ND PO
O
L
SUPPL
Y
SENSO
R
S8
SYST
E
M
/
PO
O
L
SUPPL
Y
SENSO
R
S6
SYST
E
M
/
PO
O
L
RET
U
RN
SENSO
R S7
CO
NNECT
IO
N
BO
ARD 2
X8
-3
X4
-3
X4
-1
X8
-1
0
X4
-2
X8
-2
0
CN1
-1
X6
-3
CN1
-3
X6
-1
CN1
-2
X6
-2
X8
-1
1
BO
IL
ER
PO
O
L
A
B
SHI
E
L
D
MO
D
B
U
S
RT
U
MO
D
B
U
S
INT
E
RF
A
C
E
BO
ARD
DI
SPL
AY BO
ARD
CO
M
P
UT
ER
X4
X1
1
AI
R PRESSURE
L
O
W
G
AS PRESS
HIG
H
G
A
S
PRESS SW
IT
CH
X6
-1
2
X6
-5
IN
L
E
T
SENSO
R S
2
X8
-2
O
U
T
L
ET
SENSO
R S
1
X8
-8
2
ND O
U
T
L
ET
SENSO
R S
9
X8
-1
X8
-1
6
CN1
-8
+
-
SYST
E
M
PUM
P
SPEED I
N
PUT
CN1
-1
TA
N
K
SENSO
R
S4
X8
-1
2
CN6
-6
CASCADE
SHI
E
L
D
CN6
-1
CO
NNECT
IO
N
BO
ARD 1
CO
NNECT
IO
N BO
ARD 2
BL
O
C
KED F
L
UE
X8
-1
8
CN6
-8
10
K
20
K