64
12
Diagram
-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
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
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
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
X6-1
X6-2
X6-3
Y
G
R
R
P
BAS
BOARD
Y
G
R
O
W
L
B
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
T
X6-6
BLOCKED DRAIN
SWITCH
K
B
X8-3
X8-8
X8-2
X8-4
INLET SENSOR
OUTLET SENSOR (S9)
OUTLET SENSOR (S1)
FLUE SENSOR
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
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
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
480V 30
N
2 3
1
1 2
4 5
3
WIRING DIAGRAM
100273957 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
G
L3
480V
TRANSFORMER
4
K
P
PR
PK
Y
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
X3-2
X3-4
X6-1
X6-11
X3-1
X6-2
X6-14
X6-10
X6-13
X3-3
ALARM
CONTACTS
RUN-TIME
CONTACTS
TANK
THERMOSTAT
LOUVER
PROVING
24 VAC LOUVER
RELAY COIL
GROUND
OPEN SWITCH 1
CLOSE SWITCH
24 VAC
OR
OR
BK
BK
L
B
T
R
T/BK
Y
R
B
ENABLE
R
W
3 WAY
VALVE
X6-7
X6-16
R
P
R
B
X6-4
HIGH LIMIT
SWITCH
R
W
Installation & Operation Manual
Figure 12-3 Wiring Diagram_5.0 Model