Evosta 2 Sol by DAB is a wet rotor electronic circulator designed for the circulation of water in domestic and residential thermal solar collector heating systems. It is equipped with a permanent magnet synchronous motor and electronics with variable frequency drive that automatically adapts the performance to the actual requirements of the system, to save energy and protect against water hammer action. Evosta 2 Sol is designed to ensure simple configuration: a sequential key can be used to scroll between the operating modes. All the models have a brass air vent plug and enable manual release of the motor shaft. Threaded suction and delivery ports. Techno polymer impeller. Cataphoretically-coated cast iron pump body, stainless steel motor casing. IPX5 protection, energy efficiency index EEI = 0.20.

APPLICATIONS

Low energy consumption electronic pump for hot water circulation in all types of solar heating systems.

ADVANTAGES

EVOSTA 2 SOL is the new range of DAB circulators that combines the strength of the mechanical circulator with the benefits of the electronic circulator.

Thanks to the permanent magnet synchronous motor, the frequency converter and the energy efficiency index of EEI = 0.20, as well as the IPX4 protection class

and the integrated breather plug, the EVOSTA 2 SOL family ranks as one of the best products in the category in terms of performance and reliability. The range

of EVOSTA 2 SOL circulators is the perfect substitute for old three-speed circulators due to its compact size and all-round performance.

The product is also extremely user-friendly, with a single key for sequential setting and direct access to the motor shaft for unlocking this when necessary.

CONSTRUCTION FEATURES

Cast iron pump body with cataphoresis paint coating and wet rotor motor. Steel motor casing, technopolymer impeller. Ceramic motor shaft on ceramic bushings lubricated by the pumped liquid. Stainless steel rotor liner, stator liner and closing flange. Graphite thrust ring. EPDM seal ring and brass air breather plug.

Thanks to the internal protection of the motor, the pump does not require overload protection.

CONTROL PANEL

The functions of the EVOSTA 2 SOL circulators can be modified at the control panel on the cover of the electronic control device. The pump has nine settings that can be selected using the MODE button

Six illuminated segments on the display indicate the settings of the pump. The EVOSTA SOL PWM version can be controlled from an external control unit using

the PWM (Pulse Width Modulation) digital signal. The setpoint of the adjustment curve can be of the following types:

- Proportional pressure

- Constant speed.

This is set through the PWM signal duty cycle, applied according to the VDMA Einheitsblatt 24244 standard “Wet runner circulating pumps – Specification of

PWM control signals”.

Moreover, a PWM signal on the output of the board indicates the operating mode of the circulator, as specified below.