User Manual
Installation & Operation Manual
12 Diagrams (continued)
Figure 12-3 Wiring Diagram
BOX DEPICTS
OPTIONAL ITEMS
OUTLET
SENSOR
N
o
tes:
1. All
w
i
r
i
ng
m
ust be i
ns
talled i
n
accordance
wi
t
h: local, st
at
e, provincial
and
nat
i
onal
co
d
e
requirement
s
per
eit
her N.E.
C
.
i
n
USA or
C.
S
.
A.
i
n
Canada
.
2. If
any origi
nal equipm
ent w
i
re as supplied
with
t
he
a
pp
liance must be
r
eplaced, it m
ust be
r
epla
c
ed
wit
h
wi
re havi
ng
sam
e
wir
e
gauge
(AWG) and
r
at
ed
for a
m
i
nim
um
o
f
105
°
C. Exceptions
:
Repl
ac
em
ent high vo ltage
spar
k
lead and
ribbon
cables m
ust be purchase
d fr
om
the fac
t
ory
.
Use of a
non-
appr
oved
spar
k
l
ead
or
r
i
bb
on
cables can
l
ead to
oper
at
ional
problem
s
w
hich coul
d
r
es
ul
t i
n
non-repai
rable
dam
age to the
i
nt
egr
at
ed cont
r
oller
or ot
he
r
c
om
ponent
s.
3. Act
ual
c
onnector
block
l
ocati
ons
m
ay
var
y
f
rom
t
hose
shown
on
diagram
s.
Ref
er to act
ual
component
s for
pr
oper
connector
block locati
o
n
s
when using
diagrams to tr
oubleshoot unit
.
CN3
CN2
RS485
S
HI
ELD
SHIELD
C
ASCADE
TANK
SENSOR
OUTDOOR
SENSOR
SYS
TEM
SENSOR
EXTERN
AL
C
ONTROL
RS485
S
HI
ELD
SHIELD
MOD BUS
CN3-
16
CN3-
15
CN
3-
1
4
CN
3-
13
CN
3
-
12
CN
3-
11
CN
3-
1
0
CN
3-9
CN
3-8
CN
3-
7
CN
3-6
CN
3-
5
CN3-4
CN
3-
3
CN
3-
2
CN3-1
EN
ABLE
TANK
THER
MOSTAT
TANK
THER
MOSTAT
HEX
1
FLO
W
SW
I
TCH
H
EX
2
FLOW
SWI
T
C
H
LOU
VER
PR
OVI
N
G
RUNTIME
CO
NTACTS
ALAR
M
CON
T
A
CTS
CN2-1
CN
2-2
CN2-3
CN
2-
4
CN
2-
5
CN
2-
6
CN2-7
CN
2-
8
CN
2-
9
CN2-1
0
CN
2
-
11
CN
2-12
CN
2
-
13
CN2-14
C
N4
CN1
CN
1-
10
CN
1
-
2
CN1-
9
CN
1-11
CN1-
3
CN1-
4
CN1-5
CN
1
-
6
CN1-
13
CN
1
-
14
CN1-
12
CN1-
15
CN
1-16
CN
1
-
8
CN
1-7
CONNECTION BOARD
JUNCTION
BOX
RELAY
BOARD
K1
K2
K3
X8
MOD
BUS
KI
T
X4
X6-
6
X6-
1
LOW
WATER
CUTOFF
B
O
A
RD
J3-1
J
3-
2
J3-3
J
3-
4
J3-5
J3-6
J2-1
J2-2
J
2-
3
X6
-
2
X6-
9
X6-
10
BLOWER
G
R
231
W
12
4
5
3
X3-
2
X3-
2
X
3
-
4
X3-
1
X3-
3
X3-
4
X3-
1
X
3
-
3
X6-
9
X6-
10
J3-1
TEST
SWITCH
PROBE
X2-
2
X2-
1
X1-
7
X2-
2
X2-
1
X1-
7
X1-4
X1-2
X1-
3
X1-
6
X1-
5
X1-
8
X1-
1
X
5
-
5
X5-
13
X5-
6
X5-
12
X5-
7
X5-
14
X5-
3
X5-
8
X5-
1
X5-
2
X5-
9
X1-
4
X1-
3
X1-6
X5-
7
X5-
14
X5-
3
X5-
8
X5
-
1
X
5
-
2
X5-
9
X4
X8
ON/OFF
SWI
TCH
GND
GND
GN
D
GN
D
SYSTEM
PUMP
BO
I
LER 1
BOILER
2
L
N
120V SU
PPLY
HW PUM
P
RELAY
I
NLET
SENSOR
FLUE
SENSOR
I
NLET
SENSOR
OUTLET
SE
NSOR
FLUE
SENSOR
BLOCKED
DRA
I
N
HI
-
LIMIT
G
AS
VALVE
G
AS
VALVE
SPA
RK
RO
D
G
CAUTION
HIGH VO
LTAGE SPARK LEAD
BLOWER
231
1
2
45
3
X5-
5
X5-
13
X5-
6
X5-
12
X1-
8
X1-
1
X
1
-
5
G
RW
SPAR
K
ROD
G
CAUTION
HIGH VOLTAGE SPARK LEAD
120 VAC
LOW VOLTAGE
HIGH VOLTAGE
CONTROL
MODULE 1
CON
TRO
L
MODULE
2
CM 1 PC INTERFACE
PC INTERFACE
X3
X5
RESE
T
X5-
4
X5-
10
X5-
4
X5
-
10
AP
S
FLAP
VALVE
FLAME ROD
F
LA
ME
R
OD
4 CONDUCTOR
S
GY
W
T
BR
OR
PK
RD
RD
PR
PK
GY
W
T
O
R/
BK
R
D
PR
R
D
PR
PR
OR
/
BK
BK
OR
OR
/
BK
BR
PR
RD
PR
RD
RD/
W
Y
B
K
Y/
BK
W
/
BK
RD
/
BK
BK/
RD
PK
PR/
BK
B
L
/
BK
GR/
BK
OR/BK
BK
W
T/BK
RD
RD
GR
BK
W
GY
BR/
W
W
/
R
D
Y
BK
Y
W
RD
B
K
PR
BL
GY
OR
BK
W
T
R
GR
W
BK
GY
PR
BR
OR
OR
BR
B
R
P
R
PR
+
-
10VDC
C
M 2 PC
INTERFACE
CN1-
1
PK
AUTO RESET LIMIT
HI
-
LIM
I
T
APS
FLAP
VALVE
AU
TO
RES
ET
LI
MI
T
X6-
8
X6-
8
X6-
7
LOUVER
CONTACTS
R1
R2
LOUVER
X6-
5
X6-
5
ALAR
M
CON
T
A
CTS
LOW GA
S
PRESSURE
SWI
TCH
HIGH GAS
P
RESSUR
E
1
HI
GH
G
AS
PRESSURE
2
LOU
VER
RELAY
2
LOUVER
RELAY
1
LOUVER
RELAY
1
BL
BL
O-TEMP
HEX
S
W
O-TEM
P
HEX
SW
W
I
RING DIAGRAM
LBL20045 REV M
65