Solid fuel boiler with automatic loading STALMARK DUO PID 26 kW

This boiler stands out for its versatility, as it allows the feeder to be installed on either the right or left side, making it easy to adapt to individual user requirements. Its compact side design ensures convenient access for adjusting operating parameters.

Structural Features

The DUO-PID boiler is equipped with two combustion systems:

• A modern cast iron retort burner.
• A classic chamber with a fixed water grate.

Casing

The casing is made of a bent-welded construction with a water jacket, manufactured from certified boiler steel with a thickness of 6 mm.

Operating Principle

Combustion is achieved through the automatic feeding of fuel into the cast iron retort burner via a screw feeder. The process is supported by forced air supply. The built-in cast iron deflector, located above the burner, promotes more complete gas combustion and even heat distribution.

Chimney and Damper

The chimney, set at a 45° angle, ensures efficient gas exhaust. The adjustable damper controls the draft level, preventing excessive depressurization.

Water Grate

Allows the use of large-fraction fuel (from 4 cm) and ensures the boiler operates even during power outages, provided the heating system is properly designed.

Boiler Control

The standard configuration includes an ST-750 TECH controller with a PID algorithm and a flue gas temperature sensor.

Main controller functions:

• Air supply management.
• Control of four pumps (heating, domestic hot water, underfloor heating, circulation).
• Management of a single valve actuator.
• Compatibility with three-way and four-way valves, as well as Internet and GSM control modules.

Advantages of the STALMARK DUO-PID Boiler

• Heat exchanger made of certified steel.
• Cast iron burner with a thickness of 6–8 mm and screw fuel feeding.
• 90% efficiency and high combustion effectiveness.
• Two combustion systems: automatic and traditional.
• Chimney set at a 45° angle for optimal gas exhaust.
• Universal door and the ability to install the feeder on either side.
• Support for summer operation mode.
• Controller with PID regulation and remote control capability via Internet/GSM.