Viessmann VITODENS 200 WB2A, Installation & Servicing Instructions Manual

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Appliance gas council numbers: 47-819-06 Vitodens 200 WB2A 26kW Combi
41-819-11 Vitodens 200 WB2A 26kW System
The Vitodens 200 is a fully automatic, wall hung, fan assisted balanced flue condensing system and
combination boiler for use with Natural Gas (G20) or Propane (G31). The appliance incorporates a
microprocessor based fully modulating gas control system with direct burner ignition.
The appliance features an attractive white enamelled casing with an inset control panel behind a drop
down door.
The Vitodens 200 provides central heating output between 8.0 kW (27,300Btu/h) and 24.7 kW
(84,300Btu/h) and instantaneous hot water at outputs between 8.0 kW (27,300 Btu/h) and 27.4 kW
(93,550 Btu/h). If required, the heat output can be range rated to suit the system requirements.
Heat output is controlled according to demand (in both domestic hot water and central heating mode)
by the modulating gas control. The appliance always gives priority to domestic hot water supply.
The appliance is designed for use with sealed primary water systems (only) and incorporates a
circulation pump, diverter valve assembly, pressure gauge, flow switch, DHW plate heat exchanger,
safety valve and CH expansion vessel. A separate DHW expansion vessel is not required.
Isolation valves are supplied for the heating service connections, a filling loop is included and an
automatic heating bypass is fitted to maintain an adequate flow rate through the boiler. Note that if
thermostatic radiator valves are installed we recommend that one radiator is fitted with lockshield
valves (normally in the bathroom).
If desired, the mounting bracket may be fitted and the system pipework and flue system completed
and pre-filled prior to the boiler being fitted.
Internal frost protection and an electronic control unit is fitted as standard equipment and the boiler
may be used with any suitable room thermostat and/or time clock in addition to the optional controls
available from Viessmann.
The boiler is supplied with a standard concentric air and flue duct system 125mm diameter (5 in),
which is suitable for a wall thickness of up to 360 mm (14 in) for a rear flue or 345 mm (13 3/5 in) for
a side flue with minimum clearances. The duct assembly is connected to the boiler by a
multidirectional turret, which can exit the boiler in any horizontal direction. Extension ducts may be
fitted up to a total length of 10 m (393 in).
A vertical outlet kit is also available for installation where an outside wall is not accessible and it is
necessary to fit the duct through the roof.
The appliance incorporates an electronic fault diagnosis system and display to facilitate rapid
identification of any fault conditions.
1 General Information
1.1 Appliance Description
3