12
Diagram
62
-T
-T
-T
-T
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. Exceptions: Replacement high vo ltage spark lead and ribbon cables must be purchased from the factory. Use of a non-approved spark lead
or ribbon cables can lead to operational problems which could result in non-repairable damage to the integrated controller or other components.
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 troubleshoot unit.
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CN1-12
CN1-5
CN1-10
CN1-11
CN1-6
CN1-9
CN1-8
CN1-7
CN1-1
CN1-2
CN1-3
CN1-4
17
CN3-6
CN6-2
CN3-14
CN6-1
CN3-13
CN3-12
CN3-11
CN3-10
CN3-9
CN3-8
CN6-3
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
CN3-1
CN3-2
CN3-5
CN3-3
X3-2
X3-4
X6-1
X6-11
X3-1
X6-2
X6-14
X6-10
X6-13
X6-4
X3-3
X7-8
X8-14
X8-13
X8-12
X8-11
X8-15
X8-5
X8-6
X8-16
X8-7
X8-17
X8-18
X8-1
ALARM
CONTACTS
RUN-TIME
CONTACTS
TANK
THERMOSTAT
LOUVER
PROVING
24 VAC LOUVER
RELAY COIL
GROUND
OPEN SWITCH 1
CLOSE SWITCH
24 VAC
SHIELD
SHIELD
A
B
BAS
OPTION
+
-
RATE
OUT
SYSTEM RETURN
SENSOR
SYSTEM SUPPLY
SENSOR
0-10V
TANK
SENSOR
OUTDOOR
SENSOR
+
+
-
-
0-10V
0-10V
BMS
IN
SYSTEM
PUMP IN
SHIELD
SHIELD
A
B
CASCADE
OR
OR
BK
BK
L
B
T
R
T/BK
Y
R
B
HIGH LIMIT
SWITCH
R
X6-1
X6-2
X6-3
Y
G
R
R
P
BAS
BOARD
Y
G
R
O
W
L
B
PK
R
P
R
BL/W
GY
Y
R/W
BL
J3-5
J3-4
J3-6
LWCO
BOARD
J3-3
J3-2
J2-1
J2-2
X6-3
R
O
K
B
/
R
O
K
B
/
R
O
TEST
SWITCH
LWCO
PROBE
R
O
R
O
LWCO RESET
X6-5
GPS1
GPS2
R
P
PR
X6-12
BLOCKED FLUE
OR
X6-6
BLOCKED DRAIN
SWITCH
R
B
ENABLE
X8-3
X8-8
X8-2
X8-4
INLET SENSOR
OUTLET SENSOR (S9)
OUTLET SENSOR (S1)
FLUE SENSOR
R
W
X4-1
X4-2
X4-3
X8-20
X8-10
X5-8
X5-7
X5-3
X5-9
X5-2
X5-4
X5-10
X5-5
X5-41
X5-6
X5-12
X5-1
"X5"
BLOCK WIRING
IS MODEL
DEPENDANT
K
P
PR
PK
BN
PR
R
X10-1
X1-3
X10-4
X1-1
X1-12
X1-2
X1-4
X10-2
X10-5
X1-6
ON/OFF
SWITCH
GND
GAS VALVE
(LARGE)
K
B
W
R
B
PR
R
O
OR/W
W
X6-18
X6-8
X1-8
G
X6-9
X6-17
BLOWER
R
K
B
Y
G
W
T
N
G
R/W
BK/W
X1-7
X1-10
X1-5
FLAME SENSE
SPARK
GENERATOR
SPARK ROD
24V
TRANSFORMER
W
BK
P
BL
Y
R
X1-2
X1-3
X1-1
INTEGRATED CONTROL
LARGE CONNECTION BOARD
SMALL CONNECTION BOARD
JUNCTION
BOX
X11
X4
USB
INTERFACE
BOILER PUMP
CONTACTOR
SYSTEM PUMP
CONTACTOR
DHW PUMP
CONTACTOR
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
1.5A EACH MAX
R/W BK
1
R
L1 L2 L3
240V 10
N
2 3
1
1 2
4 5
3
WIRING DIAGRAM
100273958 REV A
CN3-4
OPTIONAL
ETHERNET CABLE
E
GND
RIBBON CABLE
SW1
J2
8
43
J9
J17
J23
J12
J11
Y
J8
USB CABLE
OPTIONAL USB/WIFI
EXTENSION CABLE
J10
LCD
DISPLAY
BL
24V
J6
J7
COMMUNICATION
CONTROL BOARD
LG CON BRD
R
PR
GY
CN6-3
CN6-1
CN6-2
BAS
WIFI
DONGLE
3 WAY
VALVE
G
4
Y
X6-7
X6-16
R
P
R
B
Installation & Operation Manual
Figure 12-1 Wiring Diagram_2.5 & 3.0 Models