RESOL BS/4 Solar Hot Water Complete Pump Station
**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 of its category to offer the automatic function control according to the VDI 2169 directive. Additionally, it is equipped with a potential-free extra-low voltage relay for backup heating demand and a V40 flowmeter input for heat quantity measurement.
Features:
- Microbuttons for quick access to the manual mode and the holiday function
- 3 relay outputs (incl. 1 potential-free extra-low voltage relay)
- 4 inputs for Pt1000, Pt500 or KTY temperature sensors
- 1 V40 impulse input
- 2 PWM outputs for the speed control of high-efficiency pumps
- 10 basic system layouts to choose from
- Automatic function control according to VDI 2169
- Heat pump demand (optional)
Complete pump stations are great value, they include:
- Grundfos 15-20 CIL2 OEM Circulating Pump
- RESOL SLL controller (sensor controller - 20m x roof sensor, inlet, tank)
- AVG or AW pumps unions (subject to availability)
- AVG or AW solar rated non return valve (subject to availability)
- AVG Flow meter
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- Quality pump station cover that can be fitted to a wall or it is moulded to fit onto the side of your tank
- Thermal heat paste and roof sensor joiners
- Minor programming required when setting up the controller instructions included.
Features of the pump station are:
- Easier installation
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- UV Stabilised
- Suitable for retro fit
