Wall-mounted gas combination boiler Vaillant
Add to selection
General information
Ordercode YESSS
7551-8530 
Product code
0010021937
EAN code
4024074807804
Product group
Wall-mounted gas combination boiler
Brand
Vaillant
Product specifications
Material heat exchanger
Stainless steel
Closed version
Yes
Nominal power, 80-60 °C
25.1 kW
Heating capacity adjustable
Yes
Burner controller, modulating
Yes
Max. supply temperature (operating temperature)
75 °C
Nominal power tap water
30 kW
Built-in pump circuit
Yes
Built-in pressure gauge
Yes
Built-in weather-dependent controller
No
Built-in expansion vessel
Yes
Height
720 mm
Width
440 mm
Depth
338 mm
Connection supply
External thread metric
Outer pipe diameter supply
26.44 mm
Connection return
External thread metric
Outer pipe diameter return
26.44 mm
Connection, fuel
Other
Outer pipe diameter fuel
20 mm
Connection, air supply
Sleeve
Nominal duct width, air supply
100 mm
Connection, flue
Sleeve
Nominal duct diameter, flue
60 mm
Cold tap water connection
External thread metric
Nominal diameter cold tap water
3/4 inch (20)
Outer pipe diameter cold tap water
26.44 mm
Hot tap water connection
External thread metric
Nominal diameter hot tap water
3/4 inch (20)
Outer pipe diameter hot tap water
26.44 mm
Water heating energy efficiency (Nwh)
99 %
Capacity profile
XL
Useful heat emission at nom. heat emission, operation at high temperature (P4)
25.026 kW
Useful efficiency at nominal heat emission, operation at high temperature (n4)
88.4 %
Supplementary electricity consumption at full load (ELmax)
0.08 kW
Supplementary electricity consumption in standby-mode (Psb)
0.002 kW
Condensing
Yes
Frequency
50 Hz
Product information