Install Instructions

97
Installation & Service Manual
FIRE TUBE
™
14 Diagrams (continued)
Figure 14-3 Boiler Models Only: Ladder Diagram (Standard)
24 VAC
-T
-T
-T
-T
-T
TANK
SENSOR
OUTDOOR
SENSOR
DISPLAY
120VAC
NEUTRAL GROUND
120V SUPPLY "L"
120V SUPPLY "N"
INTEGRATED CONTROL
JUNCTION BOX
SYSTEM
PUMP "L"
SYSTEM
BOILER
PUMP
PUMP
F1
F2
F3
6.3A
3.15A
0.8A
SYSTEM
PUMP
RELAY
BOILER PUMP
RELAY
24VDC
SUPPLY
CONNECTION BOARD
INTEGRATED
CONTROL
INTEGRATED
CONTROL
CONNECTION BOARD
X1-6
X1-3
X5-9
X5-1
X4-3
CN3-2
120 VAC
24 VAC
4
-
6NC3-6NC
CN6-1
CN6-2
11
14
16
13
15
12
CN3-5 X4-8
CN3-8
X4-12
CN3-7 X4-10
CN3-3 X4-4
AIR PRESSURE
SWITCH
X5-2
X5-10
X5-11
X2-2
GASVALVE
X2-1
X5-7
X5-16
X5-8
X5-15
1
2
4
5
BLOWER
TR2
SPARK ROD
HIGH VOLTAGE SPARK LEADCAUTION
OPERATING
SENSOR S1a
HIGH LIMIT
SENSOR S1b
INLET
SENSOR S2
FLUE
SENSOR S3a
FLUE
SENSOR S3b
X5-6
X5-4
X5-12
X5-5
X5-13
X5-14
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 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.
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
LWCO
1817
CN3-1 X4-1
CN3-4 X4-5
X1-2
X1-1
1
2
3
BLOWER
LABEL, LADDER,NKB
100273312 REV C
UNUSED
GAS VALVE
RELAYS
X7
SHIELD
CASCADE
A
B
SHIELD
2
3
4
5
6
1
7
8
9
10
X6
CN5
X6
CN5
X6
CN5
X6
CN5
X6
CN5
X6
CN5
X6
CN5
DHW
PUMP
X1-4
DHW
PUMP
BOILER
PUMP
RELAY
DHW
PUMP "L"
BOILER PUMP "L"
X1-5
X1-8
19
20
TANK
THERMOSTAT
HEATLOOP
DEMAND
SYSTEM
SENSOR
AUX SWITCH