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1 1/4" threaded BSP element and Solar automatic reset thermostat pack
2 configurable digital inputs (Ext
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Replacement 2
Integrated motor protection
RESOL DeltaSol® BS/4 to suit Thermann Systems (1-3 sensors) - Replaced by DeltaSol® SLL valve 1 1/4" threaded BSP elementRESOL DeltaSol BS 4 to suit Thermann solar hot water systems (1 3 sensors) **The RESOL DeltaSol SLL controller is the replacement controller for the Resol DeltaSol BS 4, BS 2, BS Plus, AX and AL controllers.** The DeltaSol SLL is the smallest controller of the SL series. Its equipment is optimised for small and medium sized solar thermal and heating systems, 10 pre configured basic systems are available. The DeltaSol SLL is also the first controller
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