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 circuit opens. Hydrolevel controls provide contacts to de-energize the burner circuit in a low water condition.Reliable Electronic...

120volt Hot Water Boiler Low Water Cut Off. Compact DesignAutomatic ResetBurner Circuit Test ButtonPower and Low Water LED Indicators Interrupts power immediately in a low water condition. Automatically restarts burner on return of water level. Features test button, onboard indicating lights and easy to follow installation instructions. Model 1100 includes plug-in wire harness with labeled quick-connect terminals. ...

Hydro Level 400 24volt Steam Boiler Low Water Cut Off. 15 Second Burner Off Delay 30 Second Burner On Delay Automatic Reset Low Water Indicating Light Direct Boiler Mounting ? Eliminates Blowdowns 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 ...

120volt Manual Reset Steam Boiler Low Water Cut Off. 15 Second Burner Off Delay 30 Second Burner On Delay Automatic Reset Low Water Indicating Light Direct Boiler Mounting ? Eliminates Blowdowns 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 ...

120volt Manual Reset with 30 Second Delay Hot water Boiler Low Water Cut Off. Manual Reset with 30 Second Delay and Power Outage ProtectionBurner Circuit Test Button (500 Series only) LED Indicating Lights Meets ASME CSD-1 Requirements for SecondaryCut-Offs on Commercial Steam Boilers Interrupts power immediately in a low water con-550 120 VAC dition. Burner circuit locks-out if water remains below probe for 30 seconds. Manual reset will not trip due to power failures. Test button checks...