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Boiler DEFRO SIGMA E 20 kW

NN: 02700 / 02681
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Specification/boiler type Unit 12 16 20 24 36 48
Power range [kW] 3,6 - 12 4,8 - 16 6 - 20 7,2 - 24 10,8 - 36 14,4 - 48
Boiler class according to PN-EN 303-5 [-] 5
Heating area [m2] 1,9 2,3 2,7 3,1 4,3 5,2
Area of heated rooms [m2] to 220 to 260 to 290 to 350 to 450 to 600
Basic fuel [-] eco-pea coal of grain size 5-25 mm
Fuel class [-] biogenic fuel - A
Fuel tank capacity [kg] ∼165 ∼191 ∼266
Fuel consumption [kg/h] 1,8 2,2 2,9 3,5 5,2 7,1
Optimum thermal efficiency [%] ∼90,1-90,7
Max. permissible operation pressure [bar] opened system 1,5 / closed system 2,5
Required flue gas draught [mbar] 0,22 0,24 0,26 0,28 0,31 0,34
Exhaust temperature
for nominal power
for minimum power

[ºC]
[ºC]

89 - 124
64 - 71
Flue gas stream
for nominal power
for minimum power

[g/s]
[g/s]

6,8
1,6

8,6
3,1

12,0
3,6

14,4
5,5

20,9
8,0

30,4
12,5
Max. temp. of water on supply [ºC] 65 / 80
Return water temperature min. [ºC] 55
Temperature control range [ºC] 45 - 80
Boiler weight [kg] 400 449 515 523 657 728
Boiler water tank capacity [l] 88 104 110 124 170 200
Chimney section [cm x cm]
[Ømm]
14 x 14
160

15 x 15
170

17 x 17
195

19 x 19
225
Minimum chimney height [m] 5 6 7 7,5 9 10
Supply [V/Hz] 230V/50Hz
Maximum power consumption [W] 123 140
Width [mm] 1360 1380 1460
Depth [mm] 1065 1110 1210
Height [mm] 1405 1535 1685
Diameter of supply and return Dn   1 1/2"
Diameter of trigger pipe   1/2"
Diameter of flue [mm] 159 178 194
Maximum permissible ambient temperature [ºC] 50
Working pressure of the coil [bar] 2/6
DEFRO SIGMA E

 

typ / dimension A B C D E F G H I J K L pos. 6 pos. 7 pos. 8
20 130 920 Ø 178 1280 1385 1405 865 115 1110 605 640 1360 G 1 1/2" G 1 1/2" G 1/2"

FUNCTIONS IMPLEMENTED BY THE CONTROLLER

  • innovative ADAPTIVE CONTROL control system using turbine flow meter ensuring optimum selection of fan and feeder operation parameters
  • archive of last twenty alarm conditions of the boiler
  • possibility to export temperatures history to external memory (USB)
  • possibility to operate with exhaust fan module.
  • control of fan and auger conveyor
  • control of actuator of mixing valve as a standard
  • weekly programs
  • control of central heating and domestic hot water pump
  • control of two additional pumps
  • possibility to connect room controller with RS or conventional communication
  • possibility to connect DEFRO GSM module
  • possibility to connect new version of DEFRO Internet module allowing remote change of boiler operation parameters (access to user and service menu)
  • possibility to control two additional valves using DEFRO MZ modules
  • servicing of motoreducer with reverse operation (not applicable to PZ version)

CONTROLLER EQUIPMENT

  • large colour graphical display
  • touch panel
  • adjustable inclination of the screen, from 45° to 105°
  • temperature sensor for central heating, domestic hot water, valve, additional, flue gas and external temperature
  • temperature protection (thermal overload relay)
  • temperature sensor for auger (protection)
  • housing made of high quality materials resistant to high and low temperatures
controller

controller K1P v4 with colour touch panel servicing four pumps /central heating, domestic hot water, circulation, floor pump/. Servicing of mixing valve. Possibility to control using GSM or INTERNET (optional extra); adjustable angle of position of control panel

5 years of warranty

5 years of warranty for heat exchanger tightness; 2 years for the remaining components and efficient operation of the boiler;

Steel P265GH

heat exchanger made of certified boiler steel;

 
efficiency 90%

High heat efficiency up to 90% due to increased heat recovery from exhaust

closed system NZ version

NZ version adapted for installation in closed system, reinforced design, cooling coil pipe installed (optional extra)

Śruba z jednego elementu

screw of fuel feeder made of one piece;

 
retort burner

combustion chamber with highly effective retort burner;

boiler door’s opening

change of direction of boiler door’s opening (does not apply to incandescent interior door);

ADAPTIVE CONTROL

ADAPTIVE CONTROL control - adjustment of boiler operation based on air flow through the heat exchanger;

 
mechanical cleaning

F version- system for mechanical cleaning of heat exchanger

Energy-saving motoreducer

Energy-saving motoreducer with high efficiency with automatic reverse in case of locking of fuel feeder;

opening sensor

sensor indicating opening container’s cover;

 

Product specification

Power output 20 kW
Exhaust gas pipe diameter 178 mm
Weight 515 kg
Efficiency 90.1 - 90.7 %
Boiler class (303-5:2012) 5
Ecodesign yes
Size of heated surface 290 m²
Water capacity 110 L
Slow combustion 92 h
Boiler heating surface 2.7 m²
Height 1405 mm
Width 1380 mm
Exhaust pipe distance measured from the floor to its base 920 mm
Depth 865 mm
Depth with exhaust pipe 1110 mm
Max. water temperature 80 °C
Max working pressure 1.5 / 2.5 bar
Silo volume 165 dm³
Required chimney draught 26 Pa
Minimum chimney section 16 x 16 cm²
Min. chimney height 7 m
Outlet and inlet size 1 ½” inch
Min. incoming water temperature 55 °C
Power supply 230V / 50Hz
Flue gas temperature 89 - 124 °C

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