While the spring itself is omnidirectional

Field Reliability: Robust construction holds up to the rigors of service vans and mechanical rooms

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

it prevents internal heat exchanger temperatures from exceeding safe operational limits

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

Robertshaw 710-502 Gas Valve 30067439-890 While the spring itself isThe 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