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360 Defro

DBE Optima

Boiler power: 12kW (operating range 4/8/12 kW) 24 kW (operating range 8/16/24kW)
Supply voltage: 3 x 400 V, 230 V power supply available for 8-12 kW models
Max temp.: 80 °C
Guarantee: 2 years
Efficiency: 99,6 %
Degree of electrical protection: IP20
Standard equipment: Operation of the mixing valve and additional central heating pump, weekly boiler operation programmer, Control of the central heating/domestic hot water pump, Domestic hot water heating priority, pump protection, protection against freezing of the system, cooperation with the room regulator, wired weather sensor
Optional equipment - for an additional fee: Switching solenoid valve for domestic hot water, Temperature sensor. domestic hot water for the tank, Defro Internet wifi module, i-2 Plus controller, i-3 Plus controller, ST-292 v3 controller, ST-292 v2 controller, ST-294v2 controller

The DBE OPTIMA electric boiler is an advanced heating device that ensures maintenance-free and safe operation The design of the boiler allows it to operate without emitting exhaust gases, which makes it one of the safest devices dedicated to central heating and hot water systems.

It does not emit any pollutants or gases dangerous to the environment. The installation of the device itself is relatively simple and does not require large financial outlays. The boiler can function as the main heat source, especially in houses with good thermal insulation and underfloor heating operating at a low temperature. It may become the best option to choose.

It can also function as a supporting heat source for a solid-fuel boiler, a condensing boiler, a fireplace or even a heat pump in more difficult winter conditions. The boiler efficiency of 99.6% allows you to quickly obtain the desired temperature in the room. Electric boilers from Defro are an ideal solution for cooperation with a PV installation. Thanks to the solutions used in them, you can increase the level of auto consumption in a controlled way, which allows you to significantly shorten the payback time of the investment in a photovoltaic installation. With full control over the boiler thanks to a mobile application that allows you to control the boiler functions at any time from your smartphone.

 

Advantages of the DEFRO DBE OPTIMA boiler:

  • safe and ecological
  • modulation of maximum boiler power
  • daily and weekly boiler operation programmer
  • optional Wifi control
  • optional cooperation with the DHW exchanger
  • selection of boiler power from 4 to 24kW
  • cooperation with the PV installation
  • operation of the mixing valve and additional central heating pump
  • electricity consumption programmer
  • work in open and closed central heating systems
  • perfect for use with underfloor and radiator heating
  • antifreeze system
  • anti-stop system
  • advanced cooling system for boiler components
  • operating range from 5 to 80°C
  • ideal for cooperation with another heat source (heat pump, gas boiler, solid fuel boiler and fireplace)

Parameter unit of measureDEFRO DBE OPTIMADEFRO DBE OPTIMA
Operating rangeV4,0/8,0/12,08,0/16,0/24,0
Rated power of one phase (one heater) kW4,0 8,0
Rated power of three phases (all heaters)kW12,024,0
Power supply single-phase networkV 1 × 230V/50Hz
Power supplythree-phase networkV3 × 400 V / 50 Hz3 × 400 V / 50 Hz
Fuses single-phase networkA1 × 63
Fusesthree-phase networkA3 × 203 × 40
Nominal current consumption single-phase networkA1 × 52,2
Nominal current consumptionthree-phase networkA3 × 17,43 × 34,8
Minimal cross section power cord single-phase networkA3 × 10,0
Minimal cross section power cordthree-phase networkA5 × 4,05 × 10,0
Maximum allowable impedance of the power supply network Ω0,270,13
Maximum working pressure MPa (bar)0,15 (1,5)0,15 (1,5)
Capacity of the expansion vessell66
STB setting °C9090
Boiler safety valve setting MPa (bar)0,3 (3,0)0,3 (3,0)
Boiler weightkg2728

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