Install Instructions

72
13 Diagrams
BOX DEPICTS
OPTIONAL ITEMS
INTEGRATED
CONTROL
X2-1
GAS VALVE
GAS VALVE
RELAY
X5-7
X5-16
X5-8
X5-15
1
2
4
5
TR2
X1-7
FLAME ROD
SPARK
ROD
BLOWER
CONNECTION
BOARD
INLET
SENSOR
OUTLET
SENSOR
FLUE
SENSOR
INTEGRATED
CONTROL
RUN-TIME
CONTACTS
RIBBON CABLE
X7
CN2-2
X4-6
CN2-3
X4-13
CN2-4
X4-7
CN2-5
X4-14
FLUE
SENSOR
X5-4
X5-12
X5-5
X5-13
X5-14
X5-6
S2
S1a
S1b
S3a
S3b
7
8
9
10
ALARM
CONTACTS
OUTLET
SENSOR
X2-2
NOTES:
1. Where possible, switches are shown without utilities (gas, water or
electricity) connected to the unit. As such, actual switch states may
vary from those shown on diagrams depending upon whether utilities
are connected or a fault condition is present.
2. See wiring diagram for additional notes.
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
HIGH VOLTAGE SPARK LEADCAUTION
X5-2
X5-11
X5-10
AIR PRESSURE
SWITCH
BLOCKED
DRAIN SWITCH
CN2-7
X4-10
LOUVER
RELAY COIL
24VAC
LOUVER
PROVING SWITCH
CN2-8
X4-4
CN2-1
X4-5
LWCO
ENABLE
SWITCH
CN2-10
X4-12
CN2-6
X4-8
CN3-4
CN3-2
CN3-3
CN3-1
24 VAC
CONNECTION BOARD
120 VAC
24 VAC
120VAC
X1-6
F2
3.15A
F1
5A
INTEGRATED CONTROL
JUNCTION BOX
X1-1
DHW PUMP
RELAY
24V DC
SUPPLY
F3
.8A
X5-1
X5-9
X1-2
TERMINAL STRIP
120V SUPPLY "N"
3
BLOWER
21
DHW PUMP
RELAY
NEUTRAL
GROUND
TERMINAL STRIP
120V SUPPLY "L"
L
IN
JUNCTION BOX
4
2
FLOW
SWITCH
S4
X6-10
X6-14
TANK
SENSOR
1
5
6
3
O-TEMP
HEX
SWITCH
286-501
MODELS ONLY
X4-11
X5-5
DHW PUMP
CONTACTS
L
OUT
DHW
PUMP
X4-3
LADDER DIAGRAM
LBL20408 REV A
DOOR
TEMP
SW
Figure 13-1 Ladder Diagram
Installation & Service Manual