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Protherm Medved 20 KLZ 17 kW (0010005748)

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Double gas boiler. The useful power of the model becomes 17 kW. With an efficiency level of 92%, the device consumes up to 4.1 cubic metres. natural gas per hour, operating at full capacity. The temperature control range of the hot water supply system is 40-70°C. The built-in boiler with a capacity of 110 liters deserves special mention, which saves energy costs for the preparation of hot water. The combustion chamber is open, the type of installation of the boiler is floor.
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Protherm Medved 20 KLZ 17 kW
Energy source:gas
Mount:floor, dual-circuit
Boiler power:17 kW, area ~ 128 m²
Combustion chamber:open, flue 130 mm
DHW temperature:from 40 °С, before 70 °С
Timer. Can run on propane. Heat exchanger made of cast iron. Unpretentiousness to the quality of water and gas.

Double gas boiler. The useful power of the model becomes 17 kW. With an efficiency level of 92%, the device consumes up to 4.1 cubic metres. natural gas per hour, operating at full capacity. The temperature control range of the hot water supply system is 40-70°C. The built-in boiler with a capacity of 110 liters deserves special mention, which saves energy costs for the preparation of hot water. The combustion chamber is open, the type of installation of the boiler is floor.

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All specifications
Specifications Medved 20 KLZ
Main
Energy sourcegas
Installationfloor
Typedual-circuit (heating and DHW)
Heating area128 m²
Additional equipment
Built-in water heater tank
DHW tank volume90 L
Technical specs
Heat output17 kW
Min. heat output12.1 kW
Power supply230 V
Power consumption130 W
Rated current0.5 А
Coolant min. T45 °С
Coolant max. T85 °С
Heating circuit max. pressure3 bar
DHW circuit max. pressure6 bar
Consumer specs
DHW min. T40 °С
DHW max. T70 °С
Performance (ΔT ~30 °C)12.4 L/min
"Summer" mode
Circulation pump
Control buseBus
Boiler specs
Efficiency92 %
Combustion chamberopen (atmospheric)
Flue diameter130 mm
Inlet gas pressure20 mbar
Max. gas consumption2 m³/h
Expansion vessel capacity10 L
Expansion vessel pressure3.5 bar
Heat exchangercast iron
Connections
Mains water intake1/2"
DHW flow1/2"
Gas supply3/4"
Central heating flow3/4"
Central heating return3/4"
Safety
Safety systemsgas pressure drop
water overheating
flame loss
draft control
power outage
water circulation failure
frost protection
More specs
Dimensions (HxWxD)1385x505x730 mm
Weight140 kg
Added to E-Catalogseptember 2010
P/N
0010005748

FAQ: 10 frequently asked questions about heating boilersAnswers to common questions in the section "heating boilers"
Information in model description is for reference purposes.
Before buying always check characteristics and configuration of product with online store manager
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"Serious" boiler that can work on different types of gas

Like other equipment of the Medved series manufactured by the Czech company Protherm, the Protherm Medved 20 KLZ boiler is designed for floor mounting. It has an open combustion chamber. Therefore, in the room where the device is installed, there must be excellent ventilation and the ability to connect to a chimney. But it is also possible to buy a turbo attachment, which will allow you to bring the pipe from the boiler out through the wall. This boiler can operate not only on methane, but also on bottled gas (propane).

Old-fashioned, but reliable and durable

All Bears have stainless burners and cast iron heat exchangers. On the one hand, cast iron is an advantage, because it is resistant to corrosion and does not burn through, so heat exchangers made of this material last for decades. The flip side of the coin is a lot of weight. This boiler, for example, weighs as much as 140 kg (two times more than similar equipment models with heat exchangers made of other metals). Therefore, it is not always possible to bring it to the top floor of an old house with narrow stairs.

Cast iron boilers heat up slowly, but keep heat for a long time. Due to the "inertia" they are not so sensitively tuned. But, nevertheless, the modulating burner allows you to control the output power of the boiler, adjusting it in the range from 70% to 100%. In addition, the equipment is equipped with a built-in mechanical timer (acting as a programmer), and its operation can be fully automated using thermostats (purchased separately).

Boiler for a private house, workshop or shop

The 17 kW Protherm Medved 20 KLZ boiler is suitable for a family of 3 to 4 people living in a house up to 128 square metres. Thanks to the presence of a 90 L boiler, there is enough hot water for everyone (especially since the device has a decent capacity of 12.4 L / min). Due to the reliability and simplicity of design, boilers of this brand are also often used to heat water in workshops and small workshops. Users especially note the undemanding nature of Protherm equipment in terms of gas quality and water hardness.

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Medved 20 KLZ