Key Benefits Proven Safety: Integrated pressure switch input and flame sensing ensure the gas valve only opens when the ignition source is verified

Key Benefits: Full Bridge Design: Optimized 17

F and high-impact analog output test points for direct flame signal readings

The mechanical spring return ensures the application returns to a predefined safety position during a power loss

The 24V synchronous motor is designed for easy field replacement

Resideo TK300-15 Tank R-448A Key Benefits Proven Safety: IntegratedThe Resideo TK300 15 is a professional grade hydronic expansion tank engineered for closed loop heating systems. Designed to serve as a Sparco Trol external tank, this unit effectively absorbs the internal pressure surges and water volume expansion inherent in hydronic cycles. Featuring a deep drawn steel shell and a heavy duty butyl EPDM diaphragm, the TK300 15 provides superior gas retention and prevents the air to water contact that leads to