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65
Installation & Operation Manual
12 Diagrams (continued)
Figure 12-2 Wiring Diagram
39
36
35
33
32
31
30
29
26
25
23
22
21
20
19
FLUE SENSOR (S10)
FLUE SENSOR
OUTLET SENSOR (S1)
OUTLET SENSOR (S9)
6
5
3
2
1
9
10
11
12
13
15
16
1
2
3
Notes:
diagrams to troubleshoot unit.
ALARM
CONTACTS
CONTACTS
TANK
THERMOSTAT
LOUVER
PROVING
AUX
SWITCH 1
AUX
SWITCH 2
SHIELD
SHIELD
A
B
BAS
OPTION
RATE
OUT
BOILER
PUMP OUT
SENSOR
SENSOR
TANK
SENSOR
OUTDOOR
SENSOR
BMS
IN
PUMP IN
SHIELD
SHIELD
A
B
CASCADE
BL
R
OR
OR
BL
BK
BR
R
HIGH LIMIT
SWITCH
R
R
R
PR
BL
R
BL
R
BR
W
OR
OR/W
P
W
BL
BK
OR
OR/BK
OR/BK
TEST
SWITCH
LWCO
PROBE
OR
OR
LWCO RESET
GPS1
GPS2
BR
OR
BLOCKED FLUE
SWITCH
PR
BLOCKED DRAIN
SWITCH
BK
ENABLE
INLET SENSOR
R
W
"X5"
BLOCK WIRING
IS MODEL
DEPENDENT
BK
T
BL
R/W
R
W
BR
L
N
GND
120V
ON/OFF
SWITCH
GND
GAS VALVE
(SMALL)
GAS VALVE
(LARGE)
BK
W
PR
T
OR
OR
BL
R
BL
G
BLOWER
BLOWER
R
BK
W
T
BK
FLAME SENSE 2
FLAME SENSE 1
SPARK
GENERATOR
SPARK ROD
FLUE DAMPER
TRANSFORMER
FLUE DAMPER
TRANSFORMER
BL
R
R
R
P
BK
BL
OR
BL
BK
BOILER PUMP
CONTACTOR
CONTACTOR
DHW PUMP
CONTACTOR
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
OR
AIR VALVE
PRESSURE SWITCH
OR/BK
OR
AIR VALVE
OR/W
BL
OR/R
M
1
M
1
23
USB
INTERFACE
X11
R
BL
E
GND
LG CON BRD
BAS
DISCONNECT POWER
BEFORE SERVICING
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
OPTIONAL USB/WIFI
EXTENSION CABLE
OPTIONAL
ETHERNET CABLE
SW1
USB CABLE
WIFI
DONGLE
COMMUNICATION
CONTROL BOARD
R
PR