Non Condensing Gas Wall Hung Boiler 24KW HWB-A81

Features and Advantages

•The expansion vessel is built at the side. The unit has remarkable advantage of compact size.  It is well accepted in places where space is at premium.

All components used are reliable, and the maintenance is convenient. 

•Program controlled operating system makes the combi boiler simple to use, and has the advantages of energy saving, stability and safety;

•Superior combustion chamber heat insulation board and efficient heat exchanger combined to produce remarkable heat insulation and heat exchange,  jointly improve thermal efficiency and save gas; at the same time, this helps to reduce the surface temperature of adjacent components and prolong the service life;

• The closed heating water circulation system is strictly separated from the sanitary water, suitable for single-story or duplex floor heating, and also makes the heating system less prone to scaling, corrosion, etc;

• Low noise operation make the user enjoy quiet and intimate warmth.

Control Board

Technical Data

Model	HWB-A81-18P HWB-A81-18D	HWB-A81-24P HWB-A81-24D	HWB-A81-28P HWB-A81-28D
Fuel Type	Natural gas /LPG /Town gas
Rated gas pressure(Pa)	2000(Natural gas) /2800(LPG) /1000(Town gas)
Rated heat load(kW)	18	24	28
Heat efficiencty at rated heat load	≧90%	≧90%	≧90%
Power supply	AC220-50Hz	AC220-50Hz	AC220-50Hz
Rated electric power (W)	110	110	120
Water proof protection	IPX4	IPX4	IPX4
Central Heating
Rated output capacity (kW)	16.2	21.6	25.2
Water temperature range (℃)	Radiator: 30-80; Underfloor heating: 30-60
Heating area (sq.M）	50-120	80-180	120-220
Water pump lift（m)	5	5	6
Water pressure for heating system (MPa)	0.05-0.3	0.05-0.3	0.05-0.3
Expansion tank volume (L)	6	6	6
Expansion tank preload （MPa）	0.1	0.1	0.1
Heating system circuit	Sealed and forced
Domestic Hot Water
Flow rate △T=30℃(kg/min)	7.5	10	11.7
DHW temperature range(℃)	30-60
Applicable water pressure(MPa)	0.04-0.8	0.04-0.8	0.04-0.8
Min.Startup flow rate(L/min)	2.5	2.5	2.5
Min.turnoff flow rate(L/min)	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
Net weight (kg)	32.8	33	35
Normal working noise (dB)	<45	<45	<45
Exhaust type	Balanced forced draught
Ignition	Pulse automatic ignition
Temperature control method	Gas proportional modulating
Product Dimension (mm)	670*410*215	670*410*215	670*410*215
Carton Size (mm)	770*480*320	770*480*320	770*480*320