and Miller outdoor units

Three-Speed Versatility: Adjustable motor speeds allow you to match the pump performance to the specific requirements of single or multi-zone systems

Performance Restoration: Essential for maintaining thermal efficiency and preventing heat loss during the combustion process

Common Questions What is the difference between the A19BAF-1 and other A19 series controls

Direct Replacement Logic: Serves as the official successor to the BT180

Siemens Building Technology VXG44.15-4 Valve Body 320720-756 and Miller outdoor unitsThe Siemens Building Technology VXG44. 15 4 Valve Body is a high performance 1 2 inch 3 way seat valve engineered for precision fluid control in closed circuit HVAC systems. Rated with a 4. 6 Cv flow capacity (4. 0 Kvs), this bronze (CC491K) valve body is designed to handle chilled water and low temperature hot water applications with a maximum operating pressure of PN16 (232 psig). The unit features external metric threaded connections (ISO 228 1)