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59
Installation & Operation Manual
12 Diagrams (continued)
Figure 12-2 Wiring Diagram
-T
-T
-T
-T
-T
-T
-
T
-
T
-T
231
1
2
4
5
3
231
1
2
45
3
M
1
2
3
Notes
:
1. All w
i
ring mu
s
t be
installed in
acc
ordanc
e with: lo
cal,
state, provincia
l
and
na
t
ion
al
code req
uir
ements per either N.E.
C
. in USA
or C
.
S.A. in Canada.
2.
If any o
riginal equ
ipmen
t
wire
a
s
supplied
w
ith the
ap
pliance
must be re
placed, it
must be rep
l
a
ced
w
ith wir
e
ha
ving
same w
ire gauge
(
A
WG)
and rated fo
r a
mi
n
im
um of 105°C. Exceptions: R
eplacement hi
g
h
vo ltage
spark
l
e
ad and
ribb
on cables
must be
pu
rchased fr
om
the fa
c
tory. Use o
f
a non-appro
v
ed
spark lea
d
or ribbon cables can lead to
o
perat
ion
al
problems which could
r
es
u
l
t in
non-repaira
ble damage
to
the integrated controller or
other
components.
3
. A
ctua
l conne
ctor block locat
ions ma
y v
ary
fr
om
thos
e
show
n on
d
iagram
s.
Refer to a
c
t
ual c
omponents fo
r proper connect
or
blo
ck
location
s
when
u
s
ing
diagrams
to trouble
s
hoot unit.
WIRING DIA
G
RA
M
LBL20280 REV A
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
CN
1-11
CN1-6
CN1-9
CN1-8
CN
1-7
CN1-1
CN1-2
CN1-3
CN1-4
17
CN
3-6
CN6-2
CN3-7
CN3-14
CN6-1
CN3-13
CN3-12
CN3-11
CN3-10
CN3-9
CN3-8
CN6-3
18
1
9
20
21
22
23
24
25
26
2
7
28
29
30
31
32
33
34
35
36
37
38
39
40
CN3-1
CN
3-2
CN3-5
CN3-3
X
3-
2
X3-4
X
6-
1
X6-11
X3-1
X6-2
X
6-
14
X6-10
X6-13
X
6-
4
X3-3
X7-8
X
7-7
X8-14
X8-13
X8-12
X8-11
X
8
-15
X8-5
X8-6
X8-16
X8-7
X
8-17
X
8-
18
X8-1
ALAR
M
CONTACTS
RUN
-
TIME
CONTACT
S
T
ANK
THERMOSTA
T
LOU
VER
PROVING
24 VAC LOUVER
RELAY COIL
AUX
SWITCH
1
AUX
S
WITCH 2
SHIELD
SHIELD
A
B
MODBUS
OPTION
+
-
-
+
R
ATE
OUT
BOILER
PUMP OUT
SYSTEM
RETUR
N
SENSOR
SYSTEM SUPPLY
SEN
S
OR
0-10V
0-10V
TANK
SENSOR
OUTDOOR
SENSOR
+
+
-
-
0-10V
0-
10V
BMS
IN
SYSTEM
PUM
P IN
SH
I
E
LD
S
HIELD
A
B
CASCADE
R
R
RO
RO
LB
KB
RB
R
Y
RO
HI
GH
LIMIT
SWI
TCH
R
R
X6-1
X6-2
X6-3
Y
G
R
RP
MODBUS
BOARD
LB
R
LB
R
RB
W
RO
OR/W
P
W
L
B
KB
J
3-5
J3-4
J
3-6
LWCO
BO
ARD
J3-3
J
3-2
J
2-1
J
2-2
X6-3
RO
OR/BK
OR/
BK
TEST
SWITCH
LWCO
PROBE
RO
RO
LWCO
R
ESET
X
6-
5
GPS1 GPS2 GPS3
RB
RO
RO
X
6-
15
BLOWER
PROVING
SWITCH (
LARGE)
RO
X6-12
BLOWER PROVIN
G
SWITCH (S
M
ALL)
T
X13-1
BLOCKE
D
FLUE
S
WITC
H
RP
X
6-6
BLOCKED DRAIN
SWITCH
KB
ENABLE
X8-3
X8-8
X8-2
X
8-
4
X
8-
9
X
7-
1
X
7-
5
X7-2
X7-6
INLE
T
SENSOR
OUTLET SENSOR (S9)
OUTLET SENSOR (S1)
FLUE SENSOR
FLUE SE
NSOR (S10)
P
RE
-
M
IX SENSOR 1 (
S11)
PRE-M
IX SENSOR 1 (
S13)
PRE
-
M
IX SENSOR 2 (S12)
PRE
-MIX SENSOR 2
(S14)
R
W
X4-1
X4-2
X4-3
X8-2
0
X
8
-10
X
5-8
X
5-
7
X5-3
X
5-
9
X
5-
2
X
5-
4
X
5-1
0
X5-5
X5-41
X5-6
X5-12
X5-1
"X5"
B
LOCK
WIRIN
G
IS MOD
EL
D
EPENDA
NT
K
B
T
LB
W/R
R
W
YG
YG
R
B
T
X10-1
X
1-3
X
10-
4
X1-1
X
1
-12
X1-2
X
1-
4
X10-2
X10-5
X10-3
X10-6
X1-6
L
N
GND
120V
S
UPPLY
ON/OFF
SWI
TCH
G
N
D
GAS VALVE
(S
MAL
L)
GAS VALVE
(LA
R
GE)
K
B
W
RP
T
RO
RO
L
B
R
LB
X6-18
X
6-
8
X1-8
G
X6-9
X
6-
17
SMA
LL
BLOWER
RELAY
LARGE
B
LOWER
RELAY
X2-4
X13-2
X
13
-3
BLOW
ER
(SM
ALL)
BLOWER
(
LA
R
GE)
R
KB
YG
W
T
T
K
B/W
T
KB
BK/
W
W/G
R/W
BK/W
X2-3
X
1-
7
X
1-
10
X1-5
FLAME SENSE
2
FLAME SENSE 1
SPARK
GENERATOR
SPARK ROD
X2-5
FLUE DAMPER
TRANSFORMER
X
13-
4
FLUE DAMPER
24V
TRANS
F
OR
MER
L
B
R
R
R
P
KB
L
B
Y
R
O
BL
Y
BK
X1-2
X1-3
X1-1
INTEGRATED CONTROL
LARGE CONNECTION BOARD
SMALL CONNECTION BOARD
JU
NCTION
BOX
X
1
1
X4
CN3
CN
1
DU941
USB
INTERFACE
L
C
D
D
I
SPLAY
BOILER PUMP
C
ONTA
CTOR
SYSTEM
PUMP
CONTACTOR
DHW P
U
M
P
CON
T
ACTOR
KB
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
1.5A
EACH
MAX
Y/BK
CN3-4