the 998-0520-00 is an INT69 SC2 Diagnose module

Natural gas applications typically require a larger orifice

It's designed for straightforward installation

ensure the flow direction arrow on the body matches the system's water flow to prevent backflow preventer installation errors

Key Benefits for Technicians: Universal Coil Compatibility: Operates on both 24 VAC/DC and 120-277 VAC

Danfoss 193B-1536 4 Way Valve 30067439-890 the 998-0520-00 is an INT69The Danfoss 193B 1536 4 Way Valve is a high performance rotary mixing valve engineered for precision temperature control in hydronic heating and cooling systems. Built with a DZR brass valve body (Dezincification Resistant), this 2 inch valve provides exceptional durability in closed loop applications using water or up to 50% glycol concentrations. With a significant flow capacity of 46. 8 Cv and 2" FNPT threaded connections, it is designed for high