Low Water Cut Off Switch Boiler

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.

Low water cut off switch boiler.

A check valve shall be installed in a city water feed line for steam boilers. Our low water cut offsread more. Install the float type low water cutoff if provided in conjunction with the gauge glass as shown in figure 6 3. 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. Low water cut off level control. 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. If a boiler is dry fired burned without water in it it can suffer rupture or catastrophic failure.

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. 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. The needed repairs can range from re tubing to total destruction of the unit if it is overheated. A low water cutoff is a maintenance must.

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. Install the optional probe type low water cut off into the 3 4 tapping on the right side of the boiler. 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. 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.

This shuts down the heat input. Mcdonnell miller low water cut offs are specially designed to protect steam and hot water boilers from the hazards of a low water condition.