Technical data

2.3 Intended use
Vaillant gas-fired condensing boilers
VKK GB 806/3 -2806/3-E-H are constructed in accord-
ance with state of the art technology and recognised
safety regulations.
Nevertheless, there is still a risk of injury or death to the
user or others or of damage to the device and other
property in the event of improper use or use for which it
is not intended.
This unit is not intended for use by persons (including
children) having limited physical, sensory or mental ca-
pacities or who have inadequate experience and/or
knowledge, unless they are supervised by a person re-
sponsible for their safety or have been given instruc-
tions by him regarding the operation of the unit.
Children must be supervised to ensure that they do not
play with the unit.
The boiler is suitable for connection to sealed central
heating installations.
Any other or additional use is considered to be improp-
er. The manufacturer or supplier is not liable for any re-
sulting damage. The user alone bears the risk.
Use includes observance of the operating and installa-
tion manuals and all other applicable documents, as well
as adherence to the maintenance and inspection condi-
tions.
a
Caution!
Any improper use is forbidden.
2.4 Construction and function
The ecoCRAFT is a gas-fired condensing boiler which is
used as a heat producer for hot water central heating
installations up to 85 ºC.
It is suitable for operation in new installations and for
modernisation of existing heating installations in multi-
occupancy houses and in business units. The boiler is
suitable for connection to commercial heating control
systems, Vaillant controls and BEMS systems. The boiler
is suitable for connection to open-flue systems. Air for
combustion must be supplied in accordance with BS
6644. The boiler is suitable for connection to room
sealed flues „Type C“.
Equipment
- Modulation range, see Table 2.3
- Reduced environmental impact as a result of the
extremely low emission of toxic substances:
NOx <60 mg/kWh and CO < 20mg/kWh
- Compact high efficiency heat exchanger with NTC
sensor
- Modulating multi-port burner
- Class A gas valve
- Gas - air mixture regulation
- Electronically controlled fan
- Flow manifold with NTC sensor
- Return manifold with NTC sensor
- Safety temperature limiter (STL)
- Operating panel with multi-function display
- Flue gas temperature max. 80 °C
- Condensate collector
- Polypropylene siphon
- Internal frost protection function
- Interface for control of a modulating pump
- Internal cylinder temperature regulation
- Interface for temperature-based activation
- Adjustable boiler feet
Regulation range
Appliance type
Minimum Load Maximum Load
kW % kW %
VKK GB 806/3-E-H 14.0 17.5 80.0 100
VKK GB 1206/3-E-H 22.0 19.0 115.9 100
VKK GB 1606/3-E-H 27.0 17.0 160.0 100
VKK GB 2006/3-E-H 44.0 22.0 200.0 100
VKK GB 2406/3-E-H 48.0 20.0 240.0 100
VKK GB 2806/3-E-H 52.0 19.0 280.0 100
Table 2.3 Regulation ranges
5Installation and maintenance instructions ecoCRAFT - 0020055744_03
Description of the appliance 2