Furnaces with feeding screw eco pea-fired

U-RET boiler

15-34 kW
  • Heating furnace with the conveying screw
  • Modern and fully automated device equipped with the proven burner for combustion small fractions of hard coal in the form eco-pea coal and dust as well as with the additional and enlarged chamber adapted to traditional burning e.g. wood, coal.
  • The process of burning is controlled by the microprocessor driver of highest generation regulating among others blower function, feeder, blending valve, circulation pump, container of hot water with the “summer – winter” function, that is heating functional water up in the summer.Equipped with the weather sensor.
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Basic Information

PRODUCT DESCRIPTION

Structural advantages

  1. Thermal insulation aesthetically carried out from the technical mineral wool placed in cassettes of galvanized and powder sheeting – combines traditional and modern colors.
  2. Convection channels in the upper part formed in the “shelves” shape influencing on the longer vitality and high efficiency of the boiler.
  3. Corps of the boiler is made of approved steel welded in the cover of gas guaranteeing perfect quality.
  4. Additional water grate (made from approved heavy-walled pipes ensuring the long permanence), adapted for combustion diverse solid fuels.
  5. Radiator plate – so-called deflector, managing afterburning of combustible gasses and distributes the exhaust fumes evenly to the convection channels.
  6. Universal structure allows to change the side of installing the fuel feeder.
  7. Fitted thermometer with the capillary used to measure the temperature in the boiler in case of the electricity lack.
  8. Front cleaning hole allowing for the convenient access to convection channels.
  9. Fuel tank about great capacity allows to multiday loading.
  10. Wide access panels, furnace and ash door have universal fastenings enabling the simple exchange of opening direction to the right or left. Access panels, furnace and ash door with the fitted thermal plate reducing losses of the heath.
  11. Outside cover securing the fan and layout of the coaling.

Fuels

Basic
  • eco-pea coal
  • fine coal
  • pellets
Substitute
  • coal (nut type)
  • wood

Price list

Check price list
Moc nominalnaWielkość powierzchni ogrzewanejCena nettoVATCena brutto
15 kWdo 150 m²7 512,20 zł1 727,80 zł9 240,00 zł
23 kWdo 230 m²8 089,43 zł1 860,57 zł9 950,00 zł
34 kWdo 340 kW8 918,70 zł2 051,30 zł10 970,00 zł

Specifications

U-RET boiler
Technical data U-RET 15-34 kW
Type U-RET
15
23
34
Nominal powerkW
15
23
34
Power rangekW
12÷18
18÷27
27÷40
Approximate heated area
do 150
do 230
do 340
Fuel bunker capacitykg
156
170
240
Thermal efficiency at the nominal power%78÷81
Fuel typebasicHard coal of eco-pea coal product, type 32.1 or 31.2 about granulation 5 ÷ 25 mm, calorific value 25 MJ/kg, temperature of melting the ash above 1450oC and sinterability ratio RI < 10.
substituteHard coal of fines product, type 32.1 or 31.2 class 25/12 about temperature of melting the ash above 1450oC and sinterability ratio RI < 10.
Water capacityl
58
80
128
Boiler weight without waterkg
308
376
458
Size of access hole
height
mm
225
225
225
width
310
362
362
Depth of furnacemm
277
377
490
Width of furnacemm
310
362
452
Max. temperature of wateroC
90
Min. temperature of return and water supplyoC
50/60
Combustion timedays
2-5
Maximum working pressureBar
1,5
Test pressureBar
2,5
Required flue gas draftPa
15÷20
15÷25
Required stack heightm
6
8
Required stack hole cross-sectioncm²
196
254
380
ø
160
180
220
Dimensions of flue cross-section
ø
mm
160
Power consumption (230V/50Hz)W
180

 

Dimensions

U-RET boiler

U-RETunit15 kW23 kW34kW
Amm144514451545
Bmm139013901485
Cmm485536 635
Dmm11431157 1255
Emm287335395
Fmm470570 685
Gmm585685790
Hmm11751175 1280
Imm240244 235
Jmm15801690 1890
aø1″1″ 1″
bø1,5″2″2″

Control

U-RET boiler

ST – 480 controller

Functions performed by the controller:

  • Control of the fan and feeding screw or piston feeder
  • CH pump control
  • DHW pump control
  • Control of the floor pump
  • Control of the circulation pump
  • Control of the mixing valve actuator
  • The possibility to connect a room regulator with RS or traditional communication
  • The possibility to connect the ST-65 GSM module
  • The possibility to connect the ST-500 ETHERNET module
  • The possibility to control two valves with the use of additional ST-61 v4 lub ST-430 RS

Controller’s equipment:

  • Large graphic display facilitating the controller’s operation
  • CH temperature sensor
  • DHW, floor temperature sensor
  • Valve and return temperature sensor
  • External sensor (without cable)
  • Feeder temperature sensor (protection)
  • Thermal protection
  • Power supply cable
  • Pump power supply cables
  • Single-module panel casing for the boiler’s installation or in a metal casing

Video

U-RET boiler

Gallery

U-RET boiler