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Comprasion
Application
Therm 4000 S WTD 18 / Gas tankless water heater
Energy-efficient solutions for buildings

Brand:
Bosch Home Comfort
How it works
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About solution
Bosch Therm 4000 S WTD 18 Gas tankless water heater will pleasantly surprise you with its features:
- Power modulation in the range from 15 to 100%
- Separate control of power and water flow
- Water heater with closed combustion chamber
- The water heater switches on automatically when water flow is detected
- The minimum required operating water pressure is 0.3 atm
- LCD with intuitive graphical user interface
Technical equipment
- Electronic ignition
- Automatic maintenance of temperature and water flow rate when the water pressure in the water supply system changes
- Ionization electrode for flame control
- Temperature limiter that protects the heat exchanger from overheating
- Stepless modulated fan with speed control sensor
- Automatic detection of flue length and required fan speed via control panel function
- Draught control device with automatic shutdown of the column
- Atmospheric gas burner made of stainless steel with the possibility of switching to LPG operation
Properties
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Burner ignition system
automatically
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Energy efficiency class
A
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Nominal thermal power, min/max, kW
4,8-31,6
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Nominal thermal load, min/max, kW
5-34
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Permitted natural gas pressure, mbar
13
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Natural gas consumption, at maximum capacity, m3/h
3.6
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LPG consumption, at maximum capacity, kg/h
2.6
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Outlet water temperature, C
35-60
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Hot water flow at ΔT = 25 K, l/min
18
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Minimum working pressure, bar
0.1
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Flue gas temperature, at maximum capacity, °С
170
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Mass flow of flue gases at maximum power, kg/hour
85
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External diameter of the flue pipe, mm
60/100
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Permitted pressure of liquefied gas (propane/butane), mbar
30