Installation; Safety; General Safety Instructions; Instructions, Standards And Regulations - Stiebel Eltron VRC-W 400 Utilisation Et Installation

iNSTallaTiON

Safety

iNSTallaTiON
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1

General safety instructions

We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
WARNING Electrocution
Do not reach into the interior of the appliance through
the "Outdoor air" connection when the power supply is
switched on.
7.2

Instructions, standards and regulations

WARNING Injury
!
In connection with the fire prevention regulations con-
cerning the installation of ventilation systems, observe
all country-specific regulations and requirements. In
Germany, these are particularly the building regulation
guideline on fire prevention requirements of ventilation
systems in its applicable version.
Note
Observe all applicable national and regional regulations
and instructions.
7.3 Operation of the appliance in buildings with
combustion equipment
The term "combustion equipment" used below includes, for exam-
ple, tiled stoves, fireplaces and equipment with gas combustion.
WARNING Injury
!
Ventilation units can generate negative pressure in the
dwelling. If combustion equipment is operating at the
same time, combustion exhaust gases can penetrate the
room where the combustion equipment is installed. It is
therefore important to observe a number of points for
simultaneous operation of a ventilation unit and com-
bustion equipment.
The engineering, installation and operation of the ventilation unit
and combustion equipment must be carried out in accordance with
national and regional regulations.
10 | VRC-W 400 (E)
7.3.1 Planning safety measures
Together with the relevant authorities, engineers plan the safety
measures that are required for simultaneous operation of a ven-
tilation unit and combustion equipment.
Alternate operation
Alternate operation means that, when the combustion equipment
is started, the mechanical ventilation system is switched off and/
or cannot be started. Alternate operation must be ensured by
appropriate measures, e.g. automatically enforced shutdown of
the ventilation unit.
Simultaneous operation
For simultaneous operation of combustion equipment and a me-
chanical ventilation system, we recommend choosing approved
room sealed combustion equipment (in Germany, with DIBt ap-
proval).
If open flue combustion equipment is operated in the dwelling
at the same time as a ventilation unit, combustion exhaust gases
must be prevented from penetrating the home as a result of pos-
sible negative pressure in the room.
The ventilation unit may only be operated in combination with
intrinsically safe combustion equipment. This combustion equip-
ment has, for example, a draught hood or an exhaust gas monitor
and is permitted to be operated in conjunction with ventilation
units. Alternatively, external, tested safety equipment can be con-
nected to monitor the operation of the combustion equipment.
For example, you can install differential pressure monitoring to
monitor the chimney draught and to switch off the ventilation unit
in the event of a fault.
The equipment for differential pressure monitoring must fulfil the
following requirements:
- Monitoring of the differential pressure between the connec-
tion piece to the chimney and the room where the combus-
tion equipment is installed
- Possibility of matching the shutdown value for the differential
pressure to the minimum draught requirement for the com-
bustion equipment
- Floating contact to switch off ventilation
- Optional connection of a temperature capturing device so
that differential pressure monitoring is only enabled when
the combustion equipment is in operation and so that un-
wanted shutdowns due to environmental influences can be
avoided
Note
Differential pressure switches that use the pressure
differential between the outdoor air pressure and the
pressure in the room where the combustion equipment
is sited as a response criterion are not suitable.
Note
We recommend installing and regularly maintaining a
carbon monoxide detector in accordance with EN 50291
for operation of any combustion equipment.
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