Crown Boiler BWF Series Installation Instructions Manual page 32

9. Wiring (continued)
L1
Internal
Junction
Box
Overcurrent
Protection /
Disconnect
(By Installer)
Service Switch
(optional)
(By Installer)
Auxiliary
Limit
Jumper
24VAC
Jumper
Input
P4 P5
1 6
Boiler
Limit
Temperature
Sensor
P7-1
P7-2
P7-3
P8
2
DHW
24V DHW Thermostat
(By Others)
32
On/Off
System Circulator
Line Input
P1
3
On/Off
DHW Circulator
On/Off
Fan
IDL 1200
LWCO
3 4
P5
Flame
4
Rollout
1
2
Switch
LWCO
Sensing
Circuit
P8 P5 P5 P9
1
7 9
24V CH Thermostat
(By Others)
Figure 9.4: Wiring Ladder Diagram
Connection Diagram Other Side
Power Supply
120 / 60 / 1
(By Installer)
Boiler Control
System Circulator
P1
4
DHW Circulator
(Supplied by Others)
P1
5
Fan
1 2
P2
5
24V Transformer
Boiler Control
Burner
Demand
Contacts
C NO
P5 P5
3 1
Pressure
Switch
P3
1 2 3
1 2 3
EnviraCOM
Internal
Junction
Box
Neutral
P2 P1
3 1
P4
2
Proof of
Gas
Pilot
Valve
Contacts
MV
P1
P5 2
5
PV
P5
P5
2
MV/PV
8
Pilot
Spark Rod &
Flame Sense
T1
1
Ladder Diagram Legend
120 VAC, Internal Control Wiring
120 VAC Wiring
Low Voltage, Internal Control Wiring
Low Voltage Wiring
Wire Nut
Plug Connection
Screw Terminal
109836-01 - 04/20
L2 GND
J-Box
GND
Screw
Pilot
Assembly
109843-01