Gas Connection - Viessmann VITODENS 200-W Type B2HA Technical Manual

Design information
However, the high safety standard derived from the use of an exter-
nal safety solenoid valve has proved to be valuable. We therefore
recommend the continued installation of an external safety solenoid
valve when installing the Vitodens in rooms below ground level. This
requires the internal H1 extension.

Gas connection

Gas installations must only be carried out by a registered gas fitter
authorised by the relevant gas supply utility.
Connect and size the mains gas according to TRGI 2008 or TRF
1996 [or local regulations].
a Connect the mains gas according to ÖVGW-TR Gas (G1) and
the regionally applicable Building Regulations.
Max. test pressure 150 mbar (15 kPa).
We recommend installing a gas filter to DIN 3386 in the gas line.
Thermally activated safety shut-off valve
According to paragraph 4, section 5 of the FeuVo 2008 [check local
regulations], thermally actuated gas shut-off devices that shut off the
gas supply if the external temperature exceeds 100 °C must be
installed in combustion equipment or in gas supply lines immediately
upstream of the combustion equipment. These valves must isolate
the gas supply for at least 30 minutes up to a temperature of 650 °C.
This is intended to prevent the formation of explosive gas mixtures in
the event of a fire.
The gas shut-off valves supplied with the Vitodens are equipped with
integral thermally activated safety shut-off valves.
4
Minimum clearances
Maintain a clearance of 700 mm in front of the Vitodens or the DHW
cylinder for maintenance purposes.
Wall mounting Vitodens 200-W, 49 to 99 kW (single boiler)
The enclosed screws and rawl plugs are only suitable for concrete.
For other construction materials, use fixing materials that are suita-
ble for 100 kg loads.
VIESMANN
52
(cont.)
Sizing recommendation, gas flow switch
In supply areas with H below 8.6 kWh/m
IB
pliant with category I , determine a fictitious rated heat input. This
2N
fictitious rated heat input results from the rated heat input (Q
the gas appliance, multiplied by a factor of 1.14 (ratio H
Use this fictitious rated heat input to select the gas flow switch and
design the pipework to TRGI 2008 [check local regulations].
Vitodens rated heating output
kW
49
60
80
99
120 - 150
The selection recommendation for the gas flow switch does not neg-
ate the requirement for sizing the pipework correctly, including the
gas flow switch.
No maintenance clearances are required to the left or right of the
Vitodens.
3
and gas appliances com-
) of
NB
8.60/7.55).
IB
Gas flow switch
GS 10
GS 10
GS 16
GS 16
not required
VITODENS 200-W