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> New hydrolevel 550 low water cut-off auto reset in box
New hydrolevel 550 low water cut-off auto reset in box
LOOK AT ALL OF MY HVAC CONTROLS AND PARTS!
* Model: Safgard 550 Low Water Cut-Off for Steam Boilers
* Manual Reset: Shuts down the burner in a low water condition. Requires manual reset if the water remains below the probe for 30 seconds. Power interruptions will not impact the manual reset feature. When power is restored, the control will return to the same state it was in prior to the interruption fully meeting ASME CSD-1 requirements.
* Test Button: Tests control operation without lowering the water level. Depressing the test button de-energizes the burner circuit and lights the low water indicating lamp.
* McDonnell and Miller 902M, PS-850M-120
* Reliable Electronic Operation
* Inexpensive to Own and Operate
* Date of Production: December 2006
* Brand New In Box - Factory Seal Still Affixed
* Compare On-Line at $152.95
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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.
