Terminals 1 and 2 provide 24V power

reducing unnecessary service calls for simple thermal fluctuations

Why is my solenoid valve humming or buzzing

and typical rooftop unit (RTU) configurations

refer to the A4TXV series or verify with the equipment’s data plate to ensure matching pressure/temperature curves

Siemens Building Technology 658-0052 Valve R-22 Terminals 1 and 2 provideThe Siemens Building Technology 658 0052 Valve is a professional grade 1 2 inch 3 way changeover valve engineered for precise fluid management in hydronic HVAC systems. Designed as part of the Siemens Powertop series, this valve features a 2. 5 Cv flow coefficient and a quick opening flow characteristic, making it an ideal choice for 4 pipe radiant panel applications and terminal unit control. The 658 0052 is strictly a non mixing changeover valve,