Solar controller DeltaSol® SLL

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.


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

Inputs: 4 inputs for Pt1000, Pt500 or KTY temperature sensors, 1 V40 impulse input
Outputs: 2 semiconductor relays, 1 potential-free extra-low voltage relay, 2 PWM outputs
PWM frequency: 1000 Hz
PWM voltage: 10.5 V
Switching capacity:
1 (1) A 240 V~ (semiconductor relay)
1 (1) A 30 V= (potential-free relay)
Total switching capacity: 2 A 240 V~
Power supply: 100 – 240 V~ (50 – 60 Hz)
Supply connection: type Y attachment
Standby: 0.66 W
Temperature controls class: I
Energy efficiency contribution: 1 %
Mode of operation: Typ 1.B.C.Y
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
VBus® current supply: 60 mA
Functions: operating hours counter, tube collector function, thermostat function, pump speed control, heat quantity measurement, adjustable system parameters and optional functions (menu-driven), balance and diagnostics function, function control according to VDI 2169
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication/Display: System-Monitoring-Display for system visualisation, 16-segment-display, 8 symbols for indication of the system status, control lamp (Lightwheel®)
Operation: 4 push buttons and 1 adjustment dial (Lightwheel®)
Ingress protection: IP 20 / DIN EN 60529
Protection class: I
Ambient temperature: 0 … 40 °C
Pollution degree: 2
Dimensions: 110 x 166 x 47 mm

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