Gas Boiler
Item No.: | High Efficiency Series |

Features & Benifits:
*High efficiency up to 96.2%
*Environment-friendly, significantly reduces NOx and CO emission
*Easy operation with large LCD display
*Programmable weekly timer & temp. setting
*20 protective functions ensure maximum safety
*Applicable for both radiator heating system and floor heating system
Technical Data
Model | SL28-B3 | SL28-B5 | Unit |
Fuel | NG/LPG/Town Gas |
| |
C.H. system | |||
Rated input capacity (heat load) | 30 | KW | |
Rated output capacity | 28 | KW | |
Min.C.H. heat input | 6.2 | KW | |
Min.C.H. heat output | 6.5 | KW | |
Min.DHW heat input | 6.2 | KW | |
Min.DHW heat output | 6 | KW | |
Heat efficiency (100%/30% heat load) | 93/104.6 | % | |
C.H. system working pressure | 0.05~0.3 | Mpa | |
Max. C.H. flow temperature | 90 | ºC | |
Adjustable C.H. flow temperature range(± 3ºC) | 40~85(floor heating 35~60) | ºC | |
Rated power | 141 | W | |
Protection class | IPX4D |
| |
Expansion Vessel Volume | 8 | L | |
Expansion Vessel Pre-charge Pressure | 0.1 | Mpa | |
Heating area( for reference only) | 80~280 | sq.M | |
Power supply | ~220V/50Hz |
| |
Fuel(NG 12T) consumption (for reference only) | 0.6~3.1 | m/h | |
Fuel(LPG 20Y) consumption (for reference only) | 0.8~2.6 | kg/h | |
Weight(boiler only) | 55 | kg | |
DHW system | |||
Max working pressure | 0.6 | Mpa | |
Min working pressure | 0.03 | Mpa | |
DHW flow @△T=25K | 16.6 | kg/min | |
Adjustable DHW flow temperature range | 35~60 | ºC | |
Min DHW flow rate | 2.5 | kg/min | |
flow rate at constant temp. | >6 | kg/min | |
Limited flow | 12 | kg/min | |
Rated Fuel Gas Pressure | |||
NG rated pressure | 2000 | Pa | |
LPG rated pressure | 2800 | Pa |