PREX N ASH

Standard design pressure: 12 bar version; 14.8 bar version.

Assembly temperature: 191.7°C (12 bar ver.); 200°C (14.8 bar vers.).

These modern-concept and high-efficiency generators have been designed and developed in compliance with European Directive 2014/68/UE (PED) and the most recent national and European standards on pressurised recipients.

Deep penetration plate/plating welding, with the flues first enlarged using a pipe expander, then welded to the tube plate.

The furnace is amply sized in terms of diameter and length to allow limited heating loads.

The PREX N ASH generators are fitted with stainless steel turbulators positioned inside the flue to prevent formation of a stationary layer on the surface and consequently improve heat exchange.

Suitable insulation of the boiler body using highdensity mineral wool protected by stainless steel plate limits heat loss to the surrounding environment.

The door is insulated on the inside with a suitable layer of refractory concrete and covers the entire heated surface of the tube plate.

The parts subject to pressure are all welded by qualified and IIS approved personnel, according to EN standards.

Front door with reversible opening (right and left) and closing system with micrometric adjustment on the front of the boiler.

The water circuit can be inspected through a manhole at the top of the boiler and a hand opening ring at the bottom.

The boiler drain can be located on either side (R or L).

Maintenance guaranteed by easy access to the furnace and the tube bundle through the door and the removable smokebox.



CERTIFICATION

• CE mark in accordance with the following directives
• Pressure Equipment (2014/68/UE)
• Low Voltage (2014/35/UE)
• Electromagnetic Compatibility (2014/30/UE)

ACCESSORIES AVAILABLE ON REQUEST

Control panel with PLC for specific communication needs to BMS or supervision systems

Pipe stub for instrument connection able to house all boiler control and safety instruments, available in different configurations.

Economiser: a water-flue gas heat exchanger that increases efficiency by up to 5%. Its configuration and position are defined based on customer requirements.

Economiser connection complete with return pipe extension, circulating pump with on-off valves and mechanical connection to the economiser performed directly at our facilities.

System for up to 24 hours’continuous unsupervised operation.

System for up to 72 hours’continuous unsupervised operation.

Burner: brand and type chosen based on customer specifications.

Perforated burner plate based on customer specifications.

Ladder and walkway for safe access to the walkable platform on top of the boiler.

Rear smokebox completely lined with high density mineral wool insulation.

Vertical flue connection.

Pressurised expansion vessel.

FAIL SAFE minimum level probes.

B.E.C.S. (Boiler Electronic Configurable System): the B.E.C.S. control system consists of a PLC fitted with high performance Touch Panel colour operator interface. The interface can be used to manage operation of the Boiler-Burner-Central Heating System.