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Therm 4000 S WTD 18 / Gas tankless water heater

Energy-efficient solutions for buildingsBosch Home Comfort

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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

    Gas flow boiler

  • Burner ignition system

    automatically

  • Energy efficiency class

    A

  • Nominal thermal power, min/max, kW

    4,8-31,6

  • Nominal thermal load, min/max, kW

    5-34

  • Permitted natural gas pressure, mbar

    13

  • Natural gas consumption, at maximum capacity, m3/h

    3.6

  • LPG consumption, at maximum capacity, kg/h

    2.6

  • Outlet water temperature, C

    35-60

  • Hot water flow at ΔT = 25 K, l/min

    18

  • Minimum working pressure, bar

    0.1

  • Flue gas temperature, at maximum capacity, °С

    170

  • Mass flow of flue gases at maximum power, kg/hour

    85

  • External diameter of the flue pipe, mm

    60/100

  • Permitted pressure of liquefied gas (propane/butane), mbar

    30

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