this unit is engineered for systems ranging from 2 to 10 tons

restoring the direct spark ignition sequence essential for safe fuel combustion

The stainless steel construction of the burner tubes provides superior resistance to thermal stress and corrosion during long heating cycles

never leave a limit switch bypassed during operation as it is the primary safety against a cracked heat exchanger

preventing seal degradation in steam or chemical applications

Robertshaw 710-502 Gas Valve 30067439-890 this unit is engineered forThe Robertshaw 710 502 Gas Valve is an industry standard millivolt gas valve specifically engineered for low capacity heating applications where space is at a premium. This unit features a 1 2 inch inlet and outlet and is factory calibrated for 3. 5 inch WC (Water Column) for natural gas operation, though it is compatible with liquid propane when utilizing the correct conversion components. As a "snap acting" control, it provides reliable millivolt