Solar Control InstructionsAn overview of how to program the BS Plus

solar controller for various solar thermal system designs

Table of ContentsPage Arrangement Description

1 The solar controller’s operation2 Monitoring temperatures3 Arr-1 PSI Pressure-glycol system4 Arr-1 DB Drainback system5 Arr-2 PSI Pressure-glycol tank-to-tank heat

transfer6 Arr-2 DB Drainback tank-to-tank heat transfer7 Arr-2 DBX Drainback with internal coil (2

pumps)8 Arr-10 PSI Pressure glycol with 3-eay diverter

valve9 Arr-5 PSI Pressure glycol 3-way divert valve to

pool10 Direct loop solar tank heating11 Closed-loop glycol filling instructions12 Installation/filling for closed-loop

drainback

HTP Rod Hyatt National Solar Products Manager rod.hyatt@htproducts.com (508) 542-9830

Closed-loop glycol filling instructions