Install Instructions

98
Installation & Service Manual
FIRE TUBE
™
Figure 14-4 Boiler Models Only: Wiring Diagram (Standard)
14 Diagrams
DISPLAY
Notes:
1. All wiring must be installed in accordance with: local, state, provincial and national code requir
ements 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 purchase
d from the factory. Use of a non-approved spark le
ad
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.
LABEL,WIRING,NKB
100274861 REV B
X1-7
1 2 3 4 5
G
R
R
W
R
T
W
BK
Y
BL
BLOWER
-T
HIGH LIMIT SENSOR S1b
OPERATING SENSOR S1a
INLET SENSOR S2
FLUE SENSOR S3a
FLUE SENSOR S3b
BK
Y
GAS VALVE
@24VAC
SPARK
ROD
TRANSFORMER
TR2
G
HIGH VOLTAGE SPARK LEADCAUTION
FLAME SENSOR
P/BK
Y
W/R
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
BOX DEPICTS
OPTIONAL ITEMS
CONNECTION BOARD
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
X-7
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
-T
-T
-T
-T
R/BK
W/BK
GY
PR
1 2
G
3
JUNCTION
BOX
X1-3
X1-4
X1-2
X1-5
X1-6
X1-8
X1-1
OR
BR
PR
W
O
AIR PRESSURE SWITCH
SYSTEM
SENSOR
OUTDOOR
SENSOR
TANK
SENSOR
CASCADE
A
B
SHIELD
SHIELD
1
2
3
4
5
6
7
8
9
10
X6
CN5
TANK
THERMOSTAT
11
12
13
14
15
16
17
18
CN3-5
X4-12
X4-10
X4-9
X4-8
X4-5
X4-4
X4-3
X4-1
BK
BK
BK
BK
AUX LIM
HEAT/LOOP
DEMAND
BK
BK
24 VAC
COM
LOW
WATER
CUT OFF
CN6-1
CN6-2
CN6-3
CN6-4
CN3-7
CN3-6
CN3-4
CN3-3
CN3-2
CN3-1
BK
BK
CN3-8
CN1
CN2
CN3
O/BK
P
BK
120V
SUPPLY
DHW
PUMP
BOILER
PUMP
L
N
GND
G
BOX DEPICTS
OPTONAL ITEMS
SYSTEM
PUMP
G
G
G