Intended Use; Construction And Function - Vaillant ecoCRAFT VKK GB SERIES Installation And Maintenance Instructions Manual

2.4

Intended use

Vaillant VKK GB 806/3 — 2806/3-E-H gas-fired condens-
ing boilers are constructed in accordance 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 unit is a heat producer for closed hot water 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.
2.5

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 heat-
ing control systems, Vaillant controls and BEMS sys-
tems. 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".
Installation and maintenance instructions ecoCRAFT 0020055744_08
Description of the appliance 2
Equipment
- Regulation range, see Table 2.3
- Reduced environmental impact as a result of the
extremely low emission of toxic substances:
see table 12.1
- Compact high efficiency heat exchanger
with NTC sensor
- Modulating multi-port burner
- Class A gas fitting
- Gas - air mixture regulation
- Electronically controlled fan
- Flow manifold with NTC sensor
- Return manifold with NTC sensor
- Safety thermostat (STL)
- Operating field with multi-function display
- Flue gas temperature max. 80 °C
- Condensate collector
- Siphon
- Internal frost protection function
- Interface for control of a speed-regulated pump
- Internal cylinder temperature regulation
- Interface for temperature-based activation
- Adjustable boiler feet
Regulation range
Minimum Loading
Unit type
kW
VKK GB 806/3-E-H 14.0
VKK GB 1206/3-E-H 22.0
VKK GB 1606/3-E-H 27.0
VKK GB 2006/3-E-H 44.0
VKK GB 2406/3-E-H 48.0
VKK GB 2806/3-E-H 52.0
Table 2.3 Regulation ranges
Maximum Loading
% kW %
17.5 80.0 100
19.0 115.9 100
17.0 160.0 100
22.0 200.0 100
20.0 240.0 100
19.0 280.0 100
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