71
Figure 13-1
Wiring Diagram
13
Diagrams
X1-7
OR
OR
BR
PR
OR
BR
BR
PR
PR
CN2-4
CN2-1
CN1-5
CN1-6
CN1-3
CN1-4
CN1-1
CN1-2
K1
K2
K3
RELAY
BOARD
ON/OFF
SWITCH
JUNCTION
BOX
BK
W
1 2 3 4 5
G
R
BK
W
3.5A
R
T
W
BK
Y/BK
BL
BLOWER
-T
HIGH LIMIT SENSOR S1b
OPERATING SENSOR S1a
INLET SENSOR S2
FLUE SENSOR S3a
FLUE SENSOR S3b
INTEGRATED
CONTROL
BK
Y
GAS VALVE
@24VAC
SPARK
ROD
TRANSFORMER
TR2
G
HIGH VOLTAGE SPARK LEAD
CAUTION
FLAME SENSOR
P/BK
Y
W/R
X1-3
X1-4
X1-2
X1-6
X1-5
X1-8
X1-1
X5-7
X5-16
X5-8
X5-15
X5-9
X5-1
X5-2
X5-10
X5-11
X5-4
X5-12
X5-6
X5-5
X5-13
X5-14
X2-2
X2-1
BLOCKED DRAIN SWITCH
O
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: Rep lacement high voltage 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.
WIRING DIAGRAM
LBL20426 REV C
BOX DEPICTS
OPTIONAL ITEMS
CN2-2
CN2-3
DHW
PUMP
BOILER
PUMP
SYSTEM
PUMP
120V
SUPPLY
L
N
GND
L
N
X-7
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
MODBUS BOARD
MTR-01
X6
-1
X6
-2
X6
-3
X6
-4
X9-1
X9-2
X9-3
X9-4
X4-1
X4-2
X4-3
X4-4
X5-1
X5-2
X1-1
X1-2
X1-3
BK
W
G
R BLG
-T
-T
-T
-T
SHIELD
GROUNDING
JUMPER
O
GY
G
R/BK
W/BK
GY
PR
1 2
G
3
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
P
O/BK
ALARM
CONTACTS
RUN-TIME
CONTACTS
24 VAC LOUVER
RELAY COIL
LOUVER
PROVING SWITCH
FLOW
SWITCH
TANK
THERMOSTAT
13
14
15
16
17
18
19
20
21
22
SYSTEM
SENSOR
OUTDOOR
SENSOR
TANK
SENSOR
CASCADE
A
B
SHIELD
SHIELD
0-10V
+
-
BMS
IN
0-10V
+
-
SYS PUMP
IN
0-10V
+
-
BLR PUMP
OUT
0-10V
+
-
RATE
OUT
MODBUS
OPTION
A
B
SHIELD
SHIELD
35
36
37
38
39
40
41
42
43
44
45
46
CONNECTION BOARD
CN8-3
CN8-2
CN8-1
GBLR
BELL JUMPER
ALARM BELL
SILENCING SW
IT
CH
HEAT/LOOP
DEMAND
3
HEAT/LOOP
DEMAND
2
HEAT/LOOP
DEMAND
1
CN6
X6
X4-11
X4-07
X4-14
X4-06
X4-13
X4-12
X4-5
X4-4
X4-8
X4-10
X4-9
X4-2
X4-1
x4-3
GAS PRESSURE
SWITCH
1
2
3
4
5
6
7
8
9
10
11
12
24 VAC RECIRC
PUMP RELAY COIL
CN1
CN2
CN4
DHW RECIRC
SENSOR
23
24
25
26
27
28
29
30
31
32
33
34
CN3
RIBBON CABLE
CONXUS
DU
BIC
DAMPER
RELAY
FLUE DAMPER
J3-5
J3-4
J3-6
LWCO
BOARD
J3-3
J3-2
J2-1
J2-2
TEST
SWITCH
LWCO
PROBE
LWCO RESET
T
PR
3
2
1
M
X5-3
CN5-12
CN5-1
CN5-9
CN5-2
CN5-10
CN5-16
CN5-11
CN5-3
CN5-8
CN5-4
CN5-15
CN5-13
CN5-6
CN5-14
CN5-7
CN5-5
R/BL
BR/W
P/BL
R/W
GY/BL
BL/BK
Y
BL/W
PR/BK
PR/W
O/BK
BK
BK/W
GY/W
P/W
O/BL
Y
BL
O/BK
O
Y
T
PR
FAN
RELAY
Installation & Operation Manual