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Polski Producent KotłówPolish manufacturer
D E F R O *
360 Defro

Optima HG

5th grade: 19, 25, 32 kW
Energy efficiency class: A+
Fuel: firewood - humidity ≤ 20%
Optional equipment - for an additional fee: OPTIMA HG controller, leveling feet, mechanical exchanger cleaning system, boiler maintenance tools
Polish product, manufactured within the European Union. Polish product, manufactured within the European Union.

3-year warranty for the tightness of the heat exchanger, 2 years for other components and efficient operation of the boiler.

Heat exchanger made of certified high-quality boiler steel;

High thermal efficiency above 92% thanks to increased heat recovery from exhaust gases;

OPTIMA HG controller with support for a buffer, 3 pumps, a mixing valve and an exhaust fan;

The boiler is designed for installation in a closed system;

Two-stage combustion technique - fuel gasification and pyrolysis

Ceramic catalysts stabilizing the combustion process;

Exhaust fan eliminating the problem of chimney draft and stabilizing the operation of the boiler;

Mechanical heat exchanger cleaning system;

The HG boiler uses a two-stage combustion technique – fuel gasification followed by pyrolysis, meaning the combustion of the generated gases. The primary fuel is firewood. The boiler’s heat exchanger is made of high-quality certified boiler steel with a thickness of 6–8 mm and consists of two chambers arranged one above the other – the upper chamber serving as the fuel hopper and the lower chamber combining the functions of the combustion chamber and ash pan. A grate positioned between the chambers ensures excellent wood gasification and easy ash removal.

The wood gasification process allows full utilisation of the energy stored in the fuel and ensures compliance with strict emission standards. Combustion is regulated by an innovative controller with a touch display. The HG boiler is equipped with a built-in exhaust fan that prevents smoke from escaping into the boiler room. The boiler can be installed in a closed system.

Dear Customers,
we would like to remind you that the high-standard wood gasification boilers manufactured by our company are not equipped with an emergency (auxiliary) grate or an ignition chamber, nor are they designed for the installation of components enabling combustion outside the automatic combustion zone.
Only the fuels specified by the Manufacturer in the Boiler User Manual may be used.
Any modifications made to adapt the boiler for burning fuel outside the automatic combustion chamber are illegal, void the warranty, and may pose a danger to the health and life of the user.

 

Boiler output

kW

19

25

32

Fuel

–

hardwood logs – birch – Ø12 cm,

moisture content 15–20%

ZUM list identification number

–

KZ-600121

KZ-400122

KZ-200123

Fuel loading chamber capacity 1

kg

~14

~24

~27

Efficiency at nominal output

%

92,3

92,2

92,4

Energy efficiency class

–

A+

Max. permissible operating pressure

bar

3,0

Required flue draught

mbar

0,17

0,17

0,18

Max. flow water temperature

°C

70/90

Boiler weight

kg

430

510

540

Boiler water capacity

l

95

110

120

Flow and return connection diameter

inch

G 1½”

Flue outlet connection diameter

mm

Ø 130

Ø 130

Ø 130

Min. safe capacity of buffer tank 2

l

700

1200

1400

Loading opening dimensions

mm

380×400

380×400

380×450

 

OPTIMA HG

FUNCTIONS PERFORMED BY THE CONTROLLER

  • exhaust fan control
  • mixing valve actuator control
  • buffer pump control
  • DHW pump control
  • additional pump control
  • possibility of connecting a room regulator with RS or traditional communication
  • possibility of connecting the ST-65 GSM module
  • possibility of connecting the ST-505 ETHERNET module
  • possibility of controlling two valves using additional modules
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