A15 Combi Boiler is renowned for high reliability by utilizing tried and time-tested components. It comes with 4 capacity sizes 24kW, 28Kw，32kW, 40kW, available with two versions, bithermal exchanger version and double heat exchangers version.
FEATURES AND BENEFITS
TECHNCIAL DATA
| Model |
HWB-A15-24P HWB-A15-24D |
HWB-A15-28P HWB-A15-28D |
HWB-A15-32P HWB-A15-32D |
HWB-A15-40P HWB-A15-40D |
| Fuel Type | Natural gas /LPG /Town gas | |||
| Rated gas pressure(Pa) | 2000(Natural gas) /2800(LPG) /1000(Town gas) | |||
| Rated heat load(kW) | 24 | 28 | 32 | 40 |
| Heat efficiencty at rated heat load | ≧90% | ≧90% | ≧90% | ≧90% |
| Power supply | AC220-50Hz | AC220-50Hz | AC220-50Hz | AC220-50Hz |
| Rated electric power (W) | 110 | 120 | 120 | 150 |
| Water proof protection | IPX4 | IPX4 | IPX4 | IPX4 |
| Central Heating | ||||
| Rated output capacity (kW) | 21.6 | 25.2 | 28.8 | 36 |
| Water temperature range (℃) | Radiator: 30-80; Underfloor heating: 30-60 | |||
| Heating area (sq.M） | 80-180 | 120-220 | 160-260 | 250-380 |
| Water pump lift（m) | 5 | 6 | 6 | 7 |
| Water pressure for heating system (MPa) | 0.1-0.3 | 0.1-0.3 | 0.1-0.3 | 0.1-0.3 |
| Expansion tank volume (L) | 6 | 6 | 6 | 8 |
| Expansion tank preload （MPa） | 0.1 | 0.1 | 0.1 | 0.1 |
| Heating system circuit | Sealed and forced | |||
| Domestic hot water | ||||
| Flow rate △T=25℃(kg/min) | 12 | 14 | 16 | 20 |
| Flow rate △T=30℃(kg/min) | 10 | 11.7 | 13.7 | 16.7 |
| DHW temperature range(℃) | ||||
| Applicable water pressure(MPa) | 0.03-0.8 | 0.03-0.8 | 0.03-0.8 | 0.03-0.8 |
| Min.Startup flow rate(L/min) | 2.5 | 2.5 | 2.5 | 2.5 |
| Min.turnoff flow rate(L/min) | 2 | 2 | 2 | 2 |
| Connector | Heating/gas inlet: G3/4; DHW connector: G1/2 | |||
| Flue spec (mm) | Coxial double pipes Φ60-Φ100 | |||
| Flue pipe length (m) | 1 | 1 | 1 | 1 |
| Net weight (kg) | 33 | 35 | 35 | 39.5 |
| Normal working noise (dB) | <45 | <45 | <45 | <45 |
| Exhaust type | Balanced forced draught | |||
| Ignition | Pulse automatic ignition | |||
| Temperature control method | Gas proportional modulating | |||
| Dimension (mm) | 740*410*310 | 740*410*310 | 740*410*310 | 740*460*321 |
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