Steel Gas Boilers of Direct Series

The Direct series boiler with a closed combustion chamber can operate with both open and closed heating systems with a working pressure of up to 1.5 atm.

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Description

Description

The model range is from 7 to 20 kW

The boiler requires no mains connection

The rectangular heat exchanger is made of 2 mm thick high-quality steel, complying with the European standard EN 10130:2006, the American standard ASTM A 1011 and the Russian GOST 16523-97 and GOST 9045-93

Equipped with original gas burner components and automatic safety controls as well as with а micro-flame injector burner

Corrosion-proof enamel coating (operating temperature up to 950°C) and treatment with an inhibitive compound protect the heat exchanger against aggressive factors and saline solutions

High efficiency due to increased heat exchange area and the use of innovative turbulator designs for maximum exhaust gas retention

Protection against boiler blowing out, overheating and soot formation, flame control

Coaxial smoke removal system that does not require a fixed flue

Observation window for main and pilot burner combustion control

Easy boiler maintenance due to the quick-detachable top panel

Parameter	Direct-7	Direct-10	Direct-12	Direct-16	Direct-20
Gas burner type	Gas burner type GGU-7PD	Gas burner type GGU-10PD	Gas burner type GGU-12PD	Gas burner type GGU-16PD	Gas burner type GGU-20PD
Automatic safety controls	Automatic safety controls 630 EUROSIT	Automatic safety controls 630 EUROSIT	Automatic safety controls 630 EUROSIT	Automatic safety controls 630 EUROSIT	Automatic safety controls 630 EUROSIT
Rated thermal input, kW	Rated thermal input, kW 7	Rated thermal input, kW 10	Rated thermal input, kW 12	Rated thermal input, kW 16	Rated thermal input, kW 20
Deviation of rated thermal input, %	Deviation of rated thermal input, % ±5%	Deviation of rated thermal input, % ±5%	Deviation of rated thermal input, % ±5%	Deviation of rated thermal input, % ±5%	Deviation of rated thermal input, % ±5%
Rated heat output, kW	Rated heat output, kW 6.3	Rated heat output, kW 9	Rated heat output, kW 10.8	Rated heat output, kW 14.4	Rated heat output, kW 18
Efficiency, %, min.	Efficiency, %, min. 90	Efficiency, %, min. 90	Efficiency, %, min. 90	Efficiency, %, min. 90	Efficiency, %, min. 90
Natural gas consumption, m³/h	Natural gas consumption, m³/h	Natural gas consumption, m³/h	Natural gas consumption, m³/h	Natural gas consumption, m³/h	Natural gas consumption, m³/h
- max.	- max. 0,78	- max. 1,12	- max. 1,34	- max. 1,78	- max. 2,23
- average	- average 0,39	- average 0,56	- average 0,67	- average 0,89	- average 1,12
Operating water pressure, MPa	Operating water pressure, MPa 0,15	Operating water pressure, MPa 0,15	Operating water pressure, MPa 0,15	Operating water pressure, MPa 0,15	Operating water pressure, MPa 0,15
Rated natural gas pressure, Pa	Operating water pressure, MPa, 1300
Exhaust gas temperature, °C, min.	Exhaust gas temperature, °C, min. 110	Exhaust gas temperature, °C, min. 110	Exhaust gas temperature, °C, min. 110	Exhaust gas temperature, °C, min. 110	Exhaust gas temperature, °C, min. 110
Maximum water temperature at the boiler outlet, °C	Maximum water temperature at the boiler outlet, °C 90	Maximum water temperature at the boiler outlet, °C 90	Maximum water temperature at the boiler outlet, °C 90	Maximum water temperature at the boiler outlet, °C 90	Maximum water temperature at the boiler outlet, °C 90
Coaxial flue diameter, mm	Coaxial flue diameter, mm 235	Coaxial flue diameter, mm 235	Coaxial flue diameter, mm 235	Coaxial flue diameter, mm 265	Coaxial flue diameter, mm 265
Coaxial flue length, mm	Coaxial flue length, mm 330-800	Coaxial flue length, mm 330-800	Coaxial flue length, mm 330-800	Coaxial flue length, mm 330-800	Coaxial flue length, mm 330-800
Connection dimensions of the nozzle at the interface with the gas supply system, inches	Connection dimensions of the nozzle at the interface with the gas supply system, inches ¹/₂"	Connection dimensions of the nozzle at the interface with the gas supply system, inches ¹/₂"	Connection dimensions of the nozzle at the interface with the gas supply system, inches ¹/₂"	Connection dimensions of the nozzle at the interface with the gas supply system, inches ¹/₂"	Connection dimensions of the nozzle at the interface with the gas supply system, inches ¹/₂"
Connection dimensions of the nozzles at the interface with the heating system, inches	Connection dimensions of the nozzles at the interface with the heating system, inches 1¹/₂''	Connection dimensions of the nozzles at the interface with the heating system, inches 1 ¹/₂"	Connection dimensions of the nozzles at the interface with the heating system, inches 1 ¹/₂"	Connection dimensions of the nozzles at the interface with the heating system, inches 2"	Connection dimensions of the nozzles at the interface with the heating system, inches 2"
Overall dimensions, mm	Overall dimensions, mm	Overall dimensions, mm	Overall dimensions, mm	Overall dimensions, mm	Overall dimensions, mm
- height	- height 645	- height 740	- height 740	- height 790	- height 790
- width	- width 425	- width 575	- width 575	- width 660	- width 660
- depth	- depth 317	- depth 345	- depth 345	- depth 400	- depth 400
Weight, kg, max.	Weight, kg, max.	Weight, kg, max.	Weight, kg, max.	Weight, kg, max.	Weight, kg, max.
- net weight	- net weight 36	- net weight 51	- net weight 51	- net weight 69	- net weight 69
- gross weight	- gross weight 38	- gross weight 53	- gross weight 53	- gross weight 71	- gross weight 71

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