Hydrolevel SF-400 Electronic Low Water Cutoff - 24V (Steam)

Reliable Electronic Operation Easy to Install Low Maintenance; No Blowdowns No Moving Parts to Wear or Stick Time Delay Prevents Burner Short Cycling Inexpensive to Own and Operate 15 Second Burner Off Delay 30 Second Burner On Delay Automatic Reset Low Water Indicating Light Direct Boiler Mounting Eliminates Blowdowns Operation: Burner circuit contacts open after 15 second delay in a low water condition. Delay prevents short cycling caused by momentary fluctuations in the boiler water level. Automatically reactivates burner circuit 30 seconds after water reaches the probe, allowing optional water feeder to raise water level above the probe. Hydrolevel low water cut-offs are electrically operated. A probe is installed in the boiler shell or external manifold and is connected to the control unit. Water is used as a conductor to complete the circuit between the probe and the boiler shell. When water is in contact with the probe, the circuit is completed; when the water level drops below the probe, the circui...