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11 Wiring diagram
78
3
2
1
P
2
45
OUTDOOR
SENSOR
SYSTEM
SUPPLY
SENSOR
SYSTEM
RETURN
SENSOR
TANK
SENSOR
(-)
(+)
0-10VDC
CASCADE
CABLE
Tx
Rx
RS232C
(-)
(+)
LOUVER
PROVING
TANK
T'STAT
REMOTE
ENABLE
INLET
SENSOR
FLUE
SENSOR
OUTLET
SENSOR
BLOCKED
DRAIN
SWITCH
AUTO-RESET HIGH-LIMIT
CONNECTION
BOARD
X4
X5
X6
X7
X8
X1
X2
X3
INTEGRATED CONTROL
OPERATOR
INTERFACE
SYSTEM PUMP
RELAY
DHW
PUMP RELAY
BOILER
PUMP
RELAY
BLOWER
RELAY
FLOW
SWITCH
P
O/R
W
GAS
VALVE
BR
R/O
R/BK
3
2
1
1
2
W
PR
O/R
O/BK
PR
O/R
Y
3
2
1
1
2
LOUVER
RELAY
ON/OFF
POWER
SWITCH
BK
3
2
1
PR/
BK
HI-LIMIT
1 2 3 4 5 123
COMBUSTION
BLOWER
LWCO
PROBE
IGNITER
120VAC ALARM
1
2
1
2
W
BK/R
VENTILATION
FAN
W
BK/R
GY GY
123
456
7 8
10 11
12
13 14
O/R
W
O
PR
Y
Y
PR/
BK
BR
PR
GY
P
GY
W/BK
PR
BR
Y
BL
Y
BK
Y
Y
W
O
BL
GY
O
BK/R
R/BK
R/O
W
BK
O
O/BK
Y
R
G
R
W
CHASSIS
GROUND
R
BK
O
R/O
BL
O/BK
O
W
W/BK
BK/W
BK/R
R/BK
BR
BR/W
W
PR
O/W
Y
W
BL/W
BK
W
O
GY
GY
BL/
BK
R
T/
W
P
Y/
BL
G
W
T
~~~~~
~~~~~
~~~~~
R
~~~~~
~~~~~
~~~~~
O/R
R/O
R/BK
O
O/BK
GY
GY
BK/W
W
BR/W
O/W
BL/BK
BL
O/R
P
PROOF OF CLOSURE
PROOF
CLOSE
VALVE
n/a
n/a
n/a
n/a
O
BL
O/BK
BL/W
BL/R
PR/BK
Y
R/W
BR
W/BK
W
BL
GY
T
PR
T/W
R
BL/BK
Y/BL
P
G
P/BK
BK
CHASSIS
GROUND
"X5"
BLOCK'S
WIRING IS
MODEL
DEPENDENT
WATER HEATER ONLY
NOTE
CONNECTIONS FOR FIELD INSTALLED
ITEMS. SEE I&O MANUAL FOR DETAILS.
LOW VOLTAGE
120 VAC
GROUNDING
DOTTED BOX DEPICTS
OPTIONAL OR FIELD
SUPPLIED ITEMS
LBL2365 REV A
Notes:
1. All wiring must be installed in accordance with: local, state, provincial and national code
requirements per either N.E.C. in USA or C.S.A. in Canada.
2. If any original equipment wire as supplied with the appliance must be replaced, it must be
replaced with wire having same wire gauge (AWG) and rated for a minimum of 105°C
3. Actual connector block locations may vary from those shown on diagrams. Refer to actual
components for proper connector block locations when using diagrams to trouble shoot unit.
3
2
1
3
2
1
HI-GAS PRESSURE SWITCH
PR
BR
P
PR
BR
PK
3
2
1
3
2
1
3
2
1
P
LO-GAS PRESSURE SWITCH
WIRING LEGEND
WARNING:
This appliance may be
connected to one or
more branch circuits.
To prevent electrical
shock, ensure all
branch
circuits are de-energized
before attempting to
service this equipment.
Y/BL
BL
G
W/R
Y
R/W
O/R
PR
BR
P
Y/W
T
R
GY
P/BK
BK
BR/W
W
O
PR/BK
Y
W/BK
BL/R
BR
R/W
W
GY
T
O
BL
GY
T
P
R/W
W/R
BR/W
PR
R
Y/W
O/R
Y
BR
Y/BL
O
BR
3
4
2
1
1
2
3
456
1
2
3
456
789
1
2
3
456
BL
G
G
9
15 14 13
12 11
10
987
654
321
6
14
13
4
17
18
9
11
16
7
10
5
8
3
15
12
1
2
6
5
2
1
4
8
7
3
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BK/W
120V
G
O/BK
O
Y
VALVE RELAY
BL
120VAC
BOILER
SUPPLY
BOILER
PUMP
SYSTEM
PUMP
RUN-TIME
CONTACTS
LOUVER
CONTACTS
DHW
PUMP
GROUND
LINE
NEUTRAL
LINE
PUMP
LINE
PUMP
LINE
PUMP
LINE
OUT
LINE
OUT
LINE
OUT
ALARM
CONTACTS
WARNING:
To avoid possible
shock hazard,
disconnect power
before servicing.
R/O = RED WITH ORANGE TRACER
COLOR DESIGNATIONS
EXAMPLE OF STRIPED WIRE
W = WHITE
BK = BLACK
PR = PURPLE
BL = BLUE
P = PINK
O = ORANGE
T = TAN
Y = YELLOW
BR = BROWN
G = GREEN
GY = GRAY
R = RED
3
4
2
1
14
13
16
11
4
3
8
2
7
6
17
18
15
5
12
1
19
20
10
9
79 8
7 8 9
6
1
3
W/BK
15
BK BL Y
G
BR/W
3
2
1
BL/W
BL/R
3-WAY
VALVE
BOILER
O/PR
O/BR
11 1012
10 11 12
87 9
10 12
11
3
2
1
5
4
6
BK/R
W
O/PR
O
3
2
1
5
4
6
O/BK
O/BR
W
O/BK
O/
BK
O/PR
W
O/
BR
SILENCE
SWITCH
W
3
2
1
5
4
6
OO/BK
ALARM JUMPER
ALARM RELAY
O/R
PR
5
10
9
8
6
11
12
4
3
7
2
1
15
10
3
9
13
11
12
5
16
8
7
6
14
1
4
2
BL/W
MANUAL RESET
TEST
O
BK
BK/R
BK/R
1
2
3
4
5
6
123
2
3
5
6
PR
T
LOW WATER CUTOFF – 24V
LWCO
JUMPER
PR
O
BL/W
O/BK
Y
T
BL
41
1
2
3
4
5
6
O/BK
BL
O
4
5
6
1
2
3
O
T
Y
BL
T
AIR SWITCH
G
BL
11 Wiring diagram
Installation & Operation Manual