| Gas connection on appliance |
1/2" |
| Heating system connection, flow/return on appliance |
3/4" |
| Safety valve discharge pipe connection (minimum): |
15 mm |
| Condensate drain pipe (minimum) |
18.4 mm |
| Flue gas/air duct system connection |
60/100 mm |
| Gas inlet pressure for natural gas (G20) |
2 kPa (20 mbar) |
| Maximum flue gas temperature (80 °C / 60 °C) |
89 °C |
| Minimum flue gas temperature (80 °C / 60 °C) |
72 °C |
| Minimum gas volume flow at 15 °C and 1,013 mbar, G20 |
0.38 m³/h |
| Maximum gas volume flow in heating mode at 15 °C and 1,013 mbar, G20 |
2.54 m³/h |
|
Maximum gas volume flow in domestic hot water (DHW) mode at 15 °C and 1,013 mbar, G20
|
2,54m³ |
| Nominal efficiency in partial power mode (30%) |
107.40% |
| NOx class |
6 |
| Weighted NOx emission (Hs), G20 |
35.1 mg/kWh |
| CO emissions |
121.65 ppm |
| Net weight |
25.2 kg |
| Power |
|
| Nominal heat output range at P 50/30 °C |
3.8 ... 25.5 kW |
| Nominal heat output range at P 60/40 °C |
3.7 ... 24.6 kW |
| Nominal heat output range at P 75/55 °C |
3.5 ... 23.4 kW |
| Maximum domestic hot water heat input (Qmax) (Hi) |
24 kW |
| Flue gas mass flow rate at minimum heating output (P min) |
1.7 g/s (6.12 kg/h) |
| Flue gas mass flow rate at maximum heating output (P max) |
10.9 g/s (39.24 kg/h) |
| Nominal heat input range for heating |
3.6 ... 24 kW |
| Heating |
|
| Maximum heating system temperature |
75 °C |
| Maximum temperature control range |
35 ... 75 °C |
| Maximum operating pressure (MWP) |
0.3 MPa (3 bar) |
| Nominal heating water flow rate through the boiler (ΔT = 20 K) |
1,008 l/h |
| Approximate condensate volume at nominal load (pH value between 3.5 and 4) 50/30 °C |
2.40 l/h |
| Residual pump head (at nominal circulating water flow) |
0.0207 MPa (0.2070 bar) |
| Expansion vessel capacity of heating system |
8 l |
| Domestic Hot Water (DHW) |
|
| Minimum water flow rate |
1.7 l/min |
| Specific hot water flow rate D (ΔT = 30 K) |
11.5 l/min |
| Permissible operating pressure |
0.03 ... 1 MPa (0.30 ... 10 bar) |
| Recommended supply pressure |
0.03 MPa (3 bar) |
| Hot water outlet temperature range |
35 ... 55 °C |
| Electrical |
|
| Rated voltage |
230 V |
| Rated frequency |
50 Hz |
| Permissible supply voltage |
195 ... 253 V |
| Built-in fuse (slow-blow) |
T2/2 A, 250 V |
| Maximum power consumption |
90 W |
