Installation / Operation Instruction Manual

Page 26
Bradford White Corp
Figure 16. Wiring Diagram, Boiler.
- +
ST.1 6V
PUMP STATUS SWITCH
ST.2 6V
+ -
NO
C
NC
1 P
SENSOR
P2 P1 2 1
3 4 2 1
BL
Y
Y
Y
R
NO
C
TB1
L1
PUMP
PUMP LOAD MUST NOT EXCEED 5 AMPS.
BL R BK
FIELD WIRING
O  O n
1 2 3 4 5
3.6
2.0
0.4
SWITCHED 120 VAC TO PUMP
120 VAC L
DHW CALL COM CALL
HEAT CALL
OUT
COM
SYS
BOILER SENSOR
4 3 2 1
POWER
HEAT CALL DHW CALL
WWSD
CURVE/
SETP O INT
CONNECTOR SHOWN FROM REAR OF BOARD
BKW
IGNITOR
V/W
R/BK
R/BK
BK
R
Y
Y
FIELD
FIELD
+24
-24 -24
R/BK
BLY
R
BL/W
Y
BL/R
W W
Y/BLK
GY/V
BK
GY/BK
GY/BK
V/W
V/W
BR/R
BR/BK
BR/BLK
BR/BLK
R
BK
R/BK
BR/BK
BR/R
Y
R
G
G
GG
BK
W
W
W
POWER
BKBK
BK BK
BK
BK
BK BK
BL/R
BL/R
BK
STAGE 2
GAS VALVE
STAGE 1
GAS VALVE
IGN/FS
E0253400
VAL
IGN
240
L1 PSW GND
F1 F2 24
VAC
TH
FC
+
-
IGN
120
L2
HIGH
TEMPERATURE
LIMIT
MANUAL RESET
RELAY
FOR
2-STAGE
FLOW SWITCH
FIELD
INTERLOCK
L2
+24
W
MANUAL RESET
TEMPERATURE LIMIT
SWITCH
FOR SIZE 200 ONLY
PRESSURE
SWITCH
AIR
BOX/BURNER
VENT STACK
PRESSURE
SWITCH
BLOWER
TRANSFORMER
115 VAC INPUT
24 VAC OUTPUT
BL/R
24V
115V
F1
BL/R
FUSE
W
OUT DOOR
SENSOR
NOTES:
DOTTED LINES ARE FOR TWO STAGE ONLY.1. PUMP MAY BE FIELD-SUPPLIED2. REMOVE JUMPER BETWEEN 1 & P1 IN LWCO3.
Y
Y
BL
BL/R
OPTIONAL
LWCO
(SEE NOTE 3)
6
SYSTEM SENSOR
R
(WHEN USING SYSTEM SENSOR)
STAGE 2 STAGE 1
3
8
7
CTL
BD
4
RELAY
6
GAS
VALVE
GAS
VALVE
IGN CTL
VAL
FLOW
SW
PRSW
BURNER
IGN CTL
PSW
IGN CTL
TH
CNTRL
BD
FIELD
INTERLOCK
T T
CNTRL
BD
24
CNTRL
BD
24V-
CNTRL
BD
PUMP
STATUS
SW
FUSIBLE LINK
MODEL 200
ONLY
MANUAL
RESET
HIGH LIMIT
VENT STK
PR SW
+24
IGN CTL
24V
BLOWER
IGN CTL
F2
IGN CTL
F1
MAIN PWR SW 120 VAC
HSI IGNITOR
IGN CTL
L2
IGN CTL
IGN/FS
IGN CTL
IGN/120
IGN CTL
L1
120 VAC
120 VAC
CLASS 2 50 VA TRANSFORMER
PUMP
(IF EQUIPPED)
24 VAC+24
1
W
CNTRL
BD
24V+
IGN CTL
GND
BK
R
BK
H2358200B
BLACK BK
BROWN BR
RED R
ORANGE O
YELLOW Y
GREEN G
BLUE BL
VIOLET V
GRAY GY
SLATE S
WHITE W
WIRE
COLOR
DESIGNATION
SEE WIRE DIAGRAM E23486
5.E Wiring Diagrams.