Install Instructions

Figure 14-2 Ladder Diagram
LADDER DIAGRAM
100329773 REV B
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.
BOX DEPICTS
OPTIONAL ITEMS
24 VAC
CN5-6
CN5-12
CN5-11
X4-2
X4-10
X4-11
INTEGRATED
CONTROL
LOUVER
RELAY COIL
24VAC
LOUVER
PROVING SWITCH
CN5-4 X4-4
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
CAUTION HIGH VOLTAGE SPARK LEAD
BLOWER
CONNECTION
BOARD
INLET
SENSOR
OPERATING
FLUE
SENSOR
INTEGRATED
CONTROL
SHIELDED RIBBON CABLE
X7
0-10V
+
-
A
B
SHIELD
SHIELD
13
6
2
1
SILENCING
SWITCH
ALARM BELL
S6
S4
S5
BMS
CN6
X6
CN6
X6
CN6
X6
CN6
X6
CN6 X6
CN6
X6
CN6
X6
CN5-2
X4-6
CN5-9
X4-13
CN5-1
X4-7
CN5-8
X4-14
CN6
X6
CN6
X6
CN6
X6
HIGH LIMIT
FLUE
SENSOR
X5-4
X5-12
X5-5
X5-13
X5-14
X5-6
0-10V
+
-
0-10V
+
-
0-10V
+
-
IN
A
B
SHIELD
SHIELD
CN6
X6
CN6
X6
CN6
X6
CN6
X6
CN6
X6
CN8-1
X6-1
CN8-2
X6-2
CN8-3 X6-3
X4-1
X9-2
X4-2
X9-1
X4-3
X9-3
S2
S1a
S1b
S3a
S3b
21
22
26
27
23
24
30
31
32
33
35
36
37
38
39
40
41
42
43
44
3
4
1
2
M
O
D
B
U
S
29
34
9
5
6
7
8
X2- 2
CN5-3
X4-5
3A
CN5-13
X4-9
CN5-7 X4-1
11
CN5-10 X4-12
CN5-14 X4-8
CN5-5
X4- 3
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
X5- 2
X5-11
X5-10
AIR PRESSURE
SWITCH
BLOCKED
DRAIN SWITCH
CONNECTION BOARD
19
17
15
13
10
LWCO
CN7-3
CN7-2
CN7-4
CN7-1
24 VAC
HEAT/LOOP
DEMAND
HEAT/LOOP
DEMAND
3
2
1
HEAT/LOOP
DEMAND
TANK
THERMOSTAT
HIGH GAS
PRESSURE
SWITCH
LOW GAS
PRESSURE
SWITCH
20
18
16
14
9
12
FLOW
SWITCH
120 VAC
120VAC
TERMINAL STRIP
120V SUPPLY "L"
ON / OFF
SWITCH
X1- 6
X1- 2
F2
NEUTRAL
TERMINAL STRIP
120V SUPPLY "N"
3.15A
F1
A
INTEGRATED CONTROL
GROUND
JUNCTION BOX
BOILER
PUMP
DHW
PUMP
SYSTEM
PUMP
BOILER
PUMP
CONTACTS
DHW
PUMP
CONTACTS
SYSTEM
PUMP
CONTACTS
L
IN
L
OUT
PUMP RELAYS
X1-1
12
BLOWER
SYSTEM PUMP
RELAY
DHW PUMP
RELAY
BOILER PUMP
RELAY
SYSTEM PUMP
RELAY
DHW PUMP
RELAY
BOILER PUMP
RELAY
24V DC
SUPPLY
F3
.8A
X5-1
X5-9
X1-3
X1-4
3
OPTIONAL
ETHERNET CABLE
E
GND
SW1
J2
J9B
J9A
J12
J4
OPTIONAL USB/WIFI
EXTENSION CABLE
LCD
DISPLAY
24V
J3
J11
COMMUNICATION
CONTROL BOARD
WIFI
DONGLE
DAMPER RELAY
M
12
3
FLUE DAMPER
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
SYSTEM
SENSOR
OUTDOOR
SENSOR
TANK
SENSOR
CASCADE
SYS PUMP
IN
BLR PUMP
OUT
RATE
OUT
MODBUS
ALARM
CONTACTS
RUN-TIME
CONTACTS
RELAY
BLOWER
RELAYBLOWER
6.3
OUTLET SENSOR:
OUTLET SENSOR:
14 Diagrams (continued)
79
Installation & Operation Manual