Peerless Boiler Wiring Diagram. Web this wiring diagram shows 120 v coming from l1 of a circuit breaker, through a switch, powering a boiler control and returning through l2, back to the neutral. Verify power is connected per wiring diagrams. PEERLESS Boiler Manual L0308192 from usermanual.wiki Adjust thermostat to call for heat. Web these ratings […]