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.
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