1. Solar Control Instructions An overview of how to program the BS Plus solar controller for various solar thermal system designs Table of Contents Page Arrangement Description 1 The solar controller’s operation 2 Monitoring temperatures 3Arr-1 PSI Pressure-glycol system 4Arr-1 DB Drainback system 5Arr-2 PSI Pressure-glycol tank-to-tank heat transfer 6Arr-2 DB Drainback tank-to-tank heat transfer 7Arr-2 DBX Drainback with internal coil (2 pumps) 8Arr-10 PSI Pressure glycol with 3-eay diverter valve 9Arr-5 PSI Pressure glycol 3-way divert valve to pool 10 Direct loop solar tank heating 11 Closed-loop glycol filling instructions 12 Installation/filling for closed-loop drainback HTP Rod Hyatt National Solar Products Manager rod.hyatt@htproducts.com (508) 542-9830rod.hyatt@htproducts.com

12. Closed-loop glycol filling instructions