Gas Connection - Viessmann VITODENS 200-W Technical Manual

Design information
B
200
Vitodens 200-W, 125 to 150 kW
A Reference point Vitodens top edge
B Area for power cables
4
Recommended leads/cables
2
NYM 3 G 1.5 mm
– Power cables (also for accessories)
– DHW circulation pump
Interlock switch
Install an interlock for open flue operation if an extractor (e.g. cooker
hood) is fitted any room that is part of the interconnected combustion
air supply.
For this, the internal extension H2 (accessories) can be used. This
switches the extractors off when the burner is started.
Power supply for accessories
The power supply for accessories can be provided directly at the con-
trol unit.
This connection is switched by the system ON/OFF switch.
If the total system current exceeds 6 A, connect one or more exten-
sions directly to the mains supply via an ON/OFF switch.

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.
Maximum test pressure 150 mbar (15 kPa).
We recommend installing a gas filter to DIN 3386 into the gas line.
VIESMANN
30
(cont.)
A
2-core min. 0.75 mm
– Extension AM1 or EA1
– Outside temperature sensor
– Vitotronic 200-H (LON)
– Extension kit for heating circuit with mixer
(KM BUS)
– Vitotrol 100, type UTDB (230 V)
– Vitotrol 200A
– Vitotrol 300A
– Vitocomfort 200
– Wireless base station
– Radio clock receiver
2
4-core 1.5 mm
or
3-core 1.5 mm
wire
– Vitotrol 100, type UTDB-RF (230 V)
– Vitotrol 100, type UTA
Where the boiler is installed in a wet area, the power supply connection
of accessories must not be made at the control unit.
Additional requirements when installing boilers operated with
LPG in rooms below ground level
According to TRF 1996 Vol. 2 – valid as of 1 September 1997 – an
external safety solenoid valve is no longer required when installing the
Vitodens below ground level.
However, the high safety standard derived from the use of an external
safety solenoid valve has proved to be valuable. We therefore recom-
mend the installation of an external safety solenoid valve when instal-
ling the boiler in rooms below ground level. This requires the internal
H1 extension.
2
2 without green/yellow
VITODENS 200-W