Circulator & Burner Control Wiring Diagrams
Standard Wiring for Circulator with Boiler
Maintaining a Temperature of 180°
® | ® |
Low Voltage
120 Volts
20°160°
150°
15°140°
10° 
130° 120°
5°110°
Differential 
Temperature
LED
flashing green = calling for heat
solid green = at temperature
Pump/TT red = error | 24v |
Probe |
|
L1 Hot
24v
120 Volts
L2 Neutral | Switched Hot |
| Circulator |
Wiring for Burner Control L8148E
® | ® |
20°160°
150°
15°140°
10° 
130° 120°
5°110°
Differential 
Temperature
LED
flashing green = calling for heat
solid green = at temperature
Pump/TT red = error | 24v |
Probe |
|
Boiler
T
T
TV | W | T |
|
| Z |
| Transformer |
|
|
| |
| Thermostat |
| Switching Relay |
|
| C1 | C2 |
B1 | B2 |
| 120 Volt |
|
|
| |
| Burner |
|
|
L1 | L2 | Circulator |
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