SR21L Working Station User Manual Brief Introducing

●The SR21L is a compact, pre-assembled pump station for split-pressurized solar water-heating systems. It includes an integrated controller (typically SR258 or SR288), a circulation pump (often WILO), a safety valve, a flow meter, and a manometer.
●It’s designed to prevent gravity circulation via check valves and manual air bleeding, enabling safe and efficient heat transfer between the solar collectors and storage tank.
●The housing is well-insulated to reduce heat loss, and it’s built for easy installation and maintenance.