Gas Alphatherm Sigma BT 18U 18.5 kW double-circuit

Weight: 36 kg
Equipment: Display
Description: Type of heating boiler: gas, max. heating power: 18.50 kW, number of circuits: double-circuit, location: wall-mounted, fuel: natural gas, liquefied gas, type of combustion chamber: closed, type of power supply: single-phase,
Peculiarities: Air vent, built-in expansion tank, built-in circulation pump, pressure gauge, safety valve, connector for external control, thermometer, water filter
Control: Electronic
Dimensions WxHxD: 420x700x255mm
Installation: Wall-mounted
Efficiency: 92.4 %
Fuel: Natural gas, liquefied gas
Mains voltage: Single-phase
Thermal power: 7.80 - 18.50 kW
LPG consumption: 1.59 kg/hour
The combustion chamber: Closed
Max. water pressure in the DHW circuit: 6 bar
Max. water pressure in the heating circuit: 3 bar
Temperature in the DHW circuit: 35 - 57 °С
Heat carrier temperature: 45 - 78 °С
Thermal load: 9 - 20.50 kW
Expansion tank volume: 6 l
Burner: Gas
Coaxial chimney diameter: 60/100 mm
Gas connection: 3/4"
Branch pipe for connecting the DHW circuit: 1/2"
Heating circuit connection: 3/4"
Connection of a separate chimney diameter 80 mm: Yes
Permissible LPG pressure: 37 mbar
Nominal pressure of natural gas: 20 mbar
Natural gas consumption: 2.17 cu. m/hour
Number of circuits: Double-circuit, bithermic heat exchanger
Primary heat exchanger material: Copper
Type of heating boiler: Gas, convection
Hot water capacity at t 25°C: 10.1 l/min
Hot water capacity at t 30°C: 8.43 l/min
Hot water capacity at t 35°C: 7.22 l/min
Hot water capacity at t 40°C: 6.32 l/min
Hot water capacity at t 45°C: 5.3 l/min