Diagrams; Ladder Diagram (Standard) - Cadet 40-120 Installation And Service Manual

15

Diagrams

Figure 15-1 Ladder Diagram (Standard)
120VAC
X4-3
CN1-5
SYSTEM
SENSOR
OUTDOOR
SENSOR
SENSOR
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.
4. Jumper OJ1 should be cut for standard altitude and connected for high altitude.
5. Jumper OJ2 should be connected for standard (non-combi) operation and cut for combi operation.
120V SUPPLY "L"
INTEGRATED CONTROL
BOILER PUMP
X1-6 RELAY X1-2
F1
5A
X1-3
DHW PUMP
RELAY X1-1
F2
3.15A BLOWER
RELAY
X1-8
F3
24VDC
0.8A
SUPPLY
X5-9 X5-1
120 VAC
CONNECTION BOARD
24 VAC
11 FLOW SWITCH
ROOM T'STAT
7
TANK T'STAT
9
AUX SWITCH
13
SEE NOTE 5
OJ2
SEE NOTE 4
OJ1
DISPLAY
X5-6
INLET -T
SENSOR S2
X5-4
OPERATING -T
SENSOR S1a
X5-12
HIGH LIMIT -T
SENSOR S1b
X5-5
FLUE
-T
SENSOR S3a
X5-13
FLUE -T
SENSOR S3b
X5-14
CONNECTION
BOARD
CN4
1
2
CN4
3
4
CN4
5
TANK
6
CN4
NEUTRAL
JUNCTION BOX
120V SUPPLY "N"
BOILER
BOILER
PUMP "N"
PUMP "L"
BOILER
PUMP
DHW
DHW
PUMP "N"
PUMP "L"
DHW
1
2
PUMP
BLOWER
3
LWCO
CN1-14
C N 2 4 - C N 2 3 -
12
CN1-10 X4-12
CN2-1 CN2-2
24 VAC
CN1-7
8
CN1-12 X4-10
10
CN1-4
14
CN1-6
CN1-13
DRY FIRE
SWITCH
INTEGRATED
AIR PRESSURE
SWITCH
CONTROL
GASVALVE
BLOWER
SPARK ROD
X6
CAUTION
X6
X6
X6
Installation & Service Manual
GROUND
CHASSIS
GROUND
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
INTEGRATED
CONTROL
X4-8
X4-1
X4-4
X4-2
X4-9
X5-2
X5-10
X5-11
X2-2
X2-1
1
X5-7
2 X5-16
4 X5-8
X5-15
5
TR2
X1-7
FLAME ROD
HIGH VOLTAGE SPARK LEAD
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
LADDER DIAGRAM
LBL20277 REV C
85