Wiring Diagram (Combi) - Cadet 40-120 Installation And Service Manual

15
Diagrams
Figure 15-4 Wiring Diagram (Combi)
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
SYSTEM
SENSOR
OUTDOOR
SENSOR
DHW OUTLET
SENSOR
ROOM
T'STAT
DHW FLOW
SWITCH
FLOW
SWITCH
AUX LIMIT
SWITCH
LOW
WATER
CUT OFF
Y
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.
88
DISPLAY
CONNECTION BOARD
CN5
1
2
3
4
5
-T
6
CN3
7
8
9
10
11
12
13
14
CN2-1
24 VAC
CN2-2
COM
CN2-3
CN2-4
SEE NOTE 5
OJ2
SEE NOTE 4 OJ1
BK BK BK BK BK BK
BK BK BK BK BK BK
PR W/BK P/BK GY R/BK O/BK P
O
INTEGRATED
CONTROL
X7
X6
CAUTION
CN4
TR2
X1-7
X1-3
O R
JUNCTION
BOX
X1-2 B R
X1-6
B K
X1-5
W
X1-8
G
X1-1
W
B K
R
1
BLOWER
1 2 3
BK
X5-7
R
BK
X5-16 T
X5-8
W
X5-15
B K
X5-9 Y
X5-1 B L
Y BK
Installation & Service Manual
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
HIGH VOLTAGE SPARK LEAD
SPARK ROD
G
FLAME SENSE
DHW
G
PUMP
W
B K
BOILER
G
PUMP
W
L
120V
GND
SUPPLY
N
G
TRANSFORMER
2 3
4 5
WIRING DIAGRAM
LBL20298 REV C