3.3 Technical information UltraGas®(250D-700D)
Type (250D) (300D) (400D) (500D) (600D) (700D)
• Nominal output 80/60 °C with natural gas 1kW 25-228 25-278 39-370 44-462 51-556 51-648
• Nominal output 40/30 °C with natural gas 1kW 28-250 28-300 44-400 49-500 57-600 58-700
• Nominal output 80/60 °C with propane 3kW 31-226 35-276 63-370 78-454 80-546 95-636
• Nominal output 40/30 °C with propane 3kW 34-250 39-300 70-400 87-500 91-600 109-700
• Nominal load with natural gas 1kW 26-232 26-282 40-376 45-470 52-566 53-660
• Nominal load with propane 3kW 32-232 36-282 65-376 80-470 84-566 100-660
• Working pressure heating maximum/minimum bar 5.0/1.0 5.0/1.0 5.0/1.0 5.0/1.0 5.0/1.0 6.0/1.0
• Working temperature maximum °C 90 90 90 90 90 90
• Boiler water content l 412 388 719 682 636 857
•Minimum water ow l/h 000000
• Boiler weight (without water content, incl. casing) kg 766 818 1268 1344 1448 1730
•Boiler efciency at full load at 80/60 °C
(related to net/gross caloric value) % 97.9/88.2 97.8/88.1 97.9/88.2 97.9/88.2 98.0/88.3 98.2/88.5
•Boiler efciency at partial load 30% (according to EN 303)
(related to net/gross caloric value) % 108.1/97.4 108.0/97.3 108.1/97.4 108.1/97.4 108.0/97.3 108.0/97.3
•Standard efciency (according to DIN 4702 part 8) 40/30 °C % 109.6/98.7 109.6/98.7 109.7/98.8 109.7/98.8 109.7/98.8 109.8/98.9
(related to net/gross caloric value) 75/60 °C % 107.1/96.5 107.1/96.5 107.2/96.6 107.2/96.6 107.2/96.6 107.3/96.7
• Stand-by loss at 70 °C Watt 960 960 1060 1060 1060 1500
• Standard emission rate Nitrogen oxides mg/kWh 26 29 39 38 38 41
Carbon monoxide mg/kWh 3444910
• Content of CO2in the exhaust gas maximum/minimum output % 9.0/8.8 9.0/8.8 9.0/8.8 9.0/8.8 9.0/8.8 9.0/8.8
• Dimensions see table of dimensions
• Connections Flow/return DN DN 80/
PN 6
DN 80/
PN 6
DN 80/
PN 6
DN 80/
PN 6
DN 80/
PN 6
DN 125/
PN 6
Gas inches 1″ 1″ 1½″ 1½″ 1½″ 1½″
Flue gas Ø inside mm 254 254 306 306 306 356
•Gas ow pressure minimum/maximum
Natural gas E/LL mbar 18-80 18-80 18-80 18-80 18-80 18-80
Propane mbar 37-57 37-57 37-57 37-57 37-57 37-57
• Gas connection value at 0 °C/1013 mbar:
Natural gas E (Wo = 15.0 kWh/m3) Hu= 9.97 kWh/m3m3/h 23.1 28.2 37.6 47.0 56.6 65.2
Natural gas LL (Wo = 12.4 kWh/m3) Hu= 8.57 kWh/m3m3/h 27.0 32.9 43.9 54.8 66 76.1
Propane (Hu= 32.7 kWh/m3) m3/h 8.9 10.9 14.5 18.1 21.9 25.2
• Operation voltage V/Hz 230/50 230/50 230/50 230/50 230/50 230/50
• Control voltage V/Hz 24/50 24/50 24/50 24/50 24/50 24/50
• Minimum/maximum electrical power consumption Watt 44/336 44/494 44/286 44/448 46/690 49/660
• Stand-by Watt 18 18 18 18 18 18
• IP rating (integral protection) IP 20 20 20 20 20 20
• Sound power level
- Heating noise (EN 15036 part 1) (room air dependent) dB(A) 72 75 69 72 75 77
- Exhaust noise is radiated from the mouth (DIN 45635 part 47)
(room air dependent/room air independent dB(A) 68 70 65 68 69 74
•Sound pressure level heating noise
(depending on installation conditions) 2dB(A) 62 65 59 62 65 67
• Condensate quantity (natural gas ) at 40/30 °C l/h 21.7 26.5 35.3 44.2 53.2 61.3
• pH value of the condensate pH approx. 4.2 approx. 4.2 approx. 4.2 approx. 4.2 approx. 4.2 approx. 4.2
•Flue gas system: requirements, values
Temperature class T120 T120 T120 T120 T120 T120
Flue gas mass ow kg/h 383 468 624 780 940 1082
Flue gas temperature at nominal output and operation 80/60 °C °C 69 71 69 70 71 69
Flue gas temperature at nominal output and operation 40/30 °C °C 48 49 48 49 49 46
Volume ow rate combustion air Nm3/h 286 349 465 582 701 807
Feed pressure total at the combustion air/ue gas pipe Pa 60 60 60 60 60 60
Maximum draught/depression at ue gas outlet Pa -50 -50 -50 -50 -50 -50
1Data related to Hu. The boiler series is tested for EE/H-settings. With a factory setting of the Wobbe coefcient of 15.0 kWh/m3opera-
tion at a Wobbe coefcient of 12.0 up to 15.7 kWh/m3is possible without new settings.
2See also notes at “Engineering”.
3Data related to Hu. UltraGas®(250D-700D) can also be operated with propane.
• Boiler ow resistance see diagrams.
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