Oil / Gas-fired boilers of cast iron
Series DRAGO DUAL

The boiler series Drago Dual, with limbs made of cast iron, meeting the demands of modern heating systems. The program includes 6 models with a rated thermal output range of 20 to 74 kW. On the boiler Drago Dual oil or gas burners can be connected. Optimum results are achieved with a blue flame burner. There is a flange for mounting the burner on the front of the boiler body. A spacious, easily removable door, facilitates cleaning of the deductions.

Due to the special design of the Gußglieder Drago dual boiler achieves high efficiency. The heat generated is optimally exploited by the three-pass, combustion chamber and exhaust flues. The glass wool insulation cases the boiler body completely and prevent unnecessary heat losses. The boiler body consists of members from the material EN - GJL - 150. Each element undergoes after the casting process various quality tests to ensure the quality, durability and performance of Drago dual boiler.

Standard design:

  • Cladding powder coated steel and glass wool insulation
  • Panel incl. Temperature Controller, safety temperature limiter and thermometer


Panel

  1. Temperature controller
  2. Lighted main switch
  3. Safety temperature limiter
  4. Control lamp heating circulation pump (yellow)
  5. Control lamp safety temperature limiter(red)
  6. Control lamp Burner in operation (yellow)
  7. Thermometer


External control panel WNH 22 BL

In external control panel WNH 22 BL installed:
Two-step control for sliding boiler operation with circulation pump logic, pump anti-lock protection, boiler startup, summer / winter automatic frost protection switch, mode switch, digital timer with perennial power reserve, 3 standard switching time programs, day u. Week program, boiler priority switching


technical Data:

Type: 23 33 43 53 63 73
Number of links 3 4 5 6 7 8
Firing (from KW) 24,0 33,0 43,0 53,0 63,0 73,0
Firing (to KW) 26,6 36,3 47,2 57,9 68,5 79,3
CE - registration No .: 51BQ3055
Efficiency at rated output in % 90,0 91,0 91,0 91,5 92,0 92,0
Exhaust gas temperature
in °C
210 190 188 202 181 175
Exhaust gas mass flow
in kg/h
40,0 53,2 69,3 83,1 97,7 114,5
CO² - content (gas fire) in % 9 - 9,7
CO² - content
(oil firing 1.4 E - 20 °) in %
12,5 - 13
Firebox length in mm 208 308 408 508 608 708
Heating gas side pressure loss in Pa 13 25 40 40 50 65
Boiler Water Content in ltr. 15,5 19,5 23,5 27,5 31,5 35,5
Water-side resistance
in kPa
4,8 5,6 6,0 7,1 10,0 11,2
Max. Operating pressure
in bar
4 4 4 4 4 4
Connection Forward / rewind Ø 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4"
Exhaust pipe Ø 150 150 150 150 150 150
Operating temperature
in °C
49-82 49-82 49-82 49-82 49-82 49-82
hole circle Burner connection Ø 150 150 150 150 150 150
Voltage in Volt/Hz 230/50 230/50 230/50 230/50 230/50 230/50
Boiler width in mm 450 450 450 450 450 450
Boiler depth in mm 400 525 625 700 800 900
Boiler height in mm 850 850 850 850 850 850
Weight in kg 125 151 177 203 229 255