Product Description - Viessmann VITODENS 300-W Technical Manual

Vitodens 222-W

2.1 Product description

The Vitodens 222-W is a particularly space-efficient, wall mounted,
gas condensing storage combi boiler for high DHW demands. The heat
cell is comprised of the proven stainless steel Inox-Radial heat
exchanger, the modulating MatriX cylinder burner and the automatic
Lambda Pro Control combustion controller.
The integral 46 litre stainless steel loading cylinder offers the same
DHW convenience as a separate 150 litre DHW cylinder with internal
indirect coils. DHW is available immediately at the required tempera-
ture and with high consistency, even simultaneously at different draw-
off points. Apart from the loading cylinder, nearly all vital system com-
ponents such as heating water expansion vessels, pumps and safety
valves are integrated and fully fitted. All that with a total weight of only
60 kg (3.2 to 19.0 kW) and in a casing that fits into a standard kitchen
unit width of 600 mm.
The Vitodens 222-W is the ideal product, particularly in new build, as
it can be installed before the screed is put down.
Recommended applications
■ Detached and terraced houses
■ New build (e.g. pre-fabricated houses and housing association
projects): installation in utility rooms and attics
■ Modernisation: Replacement of system boilers, floorstanding atmos-
pheric gas boilers and oil/gas boilers with DHW cylinders below.
Benefits at a glance
■ Standard seasonal efficiency [to DIN]: up to
98 % (H ) [gross cv] / 109 % (H ) [net cv]
s i
■ Durable and efficient thanks to the Inox-Radial heat exchanger
■ Modulating MatriX cylinder burner with a long service life thanks to
stainless steel MatriX gauze – resistant to high temperature loads
■ High DHW convenience: NL (performance factor) up to 1.5 (corre-
sponds to a separate DHW cylinder with approx. 150 litre capacity)
■ Energy-saving high efficiency circulation pump (compliant with
Energy Label A)
■ Easy-to-use Vitotronic control unit with plain text and graphic display
VITODENS
A Inox-Radial heat exchangers made from stainless steel - for high
operational reliability, a long service life and high heating output
on a very small footprint
B Loading cylinder made from stainless steel
C Modulating MatriX cylinder burner with intelligent Lambda Pro
Control combustion controller for clean combustion and quiet
operation
D Integral diaphragm expansion vessel
E Variable speed combustion air fan for quiet and economical oper-
ation
F Integral, variable speed high efficiency circulation pump
G Plate heat exchanger
H Gas and water connections
K Digital boiler control unit
■ The programming unit of the control unit can also be fitted on a wall
mounting base (accessories)
■ Lambda Pro Control combustion controller for all gas types – saves
on costs, with inspection interval extended to 3 years
■ All system components, such as loading cylinder, (heating water)
expansion vessel, pumps and safety valves are fully fitted.
Delivered condition
Wall mounted gas condensing boiler with Inox-Radial heat exchanger,
integral loading cylinder made from stainless steel, modulating MatriX
cylinder burner for natural gas and LPG to DVGW Code of Practice
G260 [Germany], AquaBloc with multi connect system, and variable
speed high efficiency circulation pump.
With diaphragm expansion vessel for heating water.
Fully plumbed and wired. White epoxy-coated casing.
Packed separately:
Vitotronic 100 for constant temperature mode
or
Vitotronic 200 for weather-compensated operation.
Preset for operation with natural gas. A conversion within gas groups
E/LL is not required. The conversion to LPG is made at the gas valve
(a conversion kit is not required).
Accessories required (order separately)
Installation aid with:
■ Fixings
■ Valves/fittings
■ DHW safety valve
■ Boiler drain & fill valve
■ Gas shut-off valve with thermally activated safety shut-off valve
For installation either on finished or unfinished walls.
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VIESMANN
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