it does not require field calibration

Common indicators include the furnace failing to ignite despite a functional ignitor

Look for signs of "sooting" around the flue pipe transition

maintaining delivery setpoints regardless of fluctuating inlet pressures

Simplifies thermocouple wiring and diagnostics in complex combustion safety circuits

Resideo VR8304M2501 Valve 320074-702 it does not require fieldThe Resideo VR8304M2501 is a single stage gas valve engineered for precision in high capacity heating applications. This intermittent pilot dual automatic valve features a standard opening characteristic with a rated capacity of 240,000 BTU hr (at 1 in. wc p. d.), making it a reliable choice for commercial and residential appliances requiring robust fuel control. The VR8304M2501 operates on a 24VAC gas valve circuit and maintains a factory set 3. 5