Low Water Cut Off Switch Boiler

Maximum inlet water temperature 120 f 49 c maximum vessel pressure 35 psi 2 5 kg cm2 primary low water fuel cut off protection and pump control for commercial and industrial steam boilers motorized valve controller low water cut off high water cut off and alarm actuator for boilers vessels and tanks.

Low water cut off switch boiler.

Mcdonnell miller low water cut offs are specially designed to protect steam and hot water boilers from the hazards of a low water condition. This probe style low water cutoff features patented dualvision technology external led s and simplified wiring for easy installation and testing and automatic manual reset mode and are available in 24vac or 120vac models. Install the float type low water cutoff if provided in conjunction with the gauge glass as shown in figure 6 3. A low water cutoff is a mechanical device usually a float switch that is used to turn off the burner or shut off fuel to a boiler to prevent it from running once the water drops below a certain point.

In operation they will interrupt the electrical current to the firing device if the water in the system drops below the boiler manufacturer s minimum safe water level. Low water cut off level control. Nys rule 4 13 4 d 4 14 4 b and 4 5 9. For cast iron boilers the feed water shall not be introduced through openings or connections used for relief water column or water level gage glass.

In operation they will interrupt the electrical current to the firing device if the water in the system drops below the boiler manufacturer s minimum safe water level. Mcdonnell miller low water cut offs are specially designed to protect steam and hot water boilers from the hazards of a low water condition. Refer to figure 6 2 for tapping location. The needed repairs can range from re tubing to total destruction of the unit if it is overheated.

Install the optional probe type low water cut off into the 3 4 tapping on the right side of the boiler. A low water cutoff is a maintenance must. Safgard 550 commercial hot water boiler low water cut off 120 vac standard el1214 3 4 npt probe by hydrolevel hydrolevel 1100 safgard low water cut off for gas hot water boilers 24v 3 7 out of 5 stars 5. The taco low water cutoff provides accurate and dependable protection for all types of boilers from small residential hot water boilers to large industrial steam units.

A check valve shall be installed in a city water feed line for steam boilers. In the event of low water the low water trips will trip the burner or fuel flow for solid fuel boilers and shut down the forced draft fan.