Ochsner TERRA 6, Operating And Installation Manual

Page: 14 / 92

INSTALLATION | Preparing to install the appliance
14 www.ochsner.com | 982001-TERRA-M2-M4-EN04.1
9.2 Preparing the heat source system
We recommend installing the heat source system or brine
circuit using shallow laying, deep trench laying or geother-
mal probes.
Sizing and routing the brine circuit (heat source system)
is the system installer’s responsibility and must be carried
out in compliance with OCHSNER guidelines.
9.2.1 Geothermal collectors
i
Information
If the appliance, the brine lines, the pipe fixings
and the wall conduits are not installed correctly,
structure-borne sound can be transmitted to the
building.
»
Ensure that the brine lines are installed in a
way that provides structure-borne noise atten-
uation. The system installer carrying out the
work is responsible for this.
Extraction capacity for shallow laying (acc. to VDI 4640):
Soil conditions Max. spec. extrac-
tion capacity at
1800 h/a [W/m²]
Max. spec. extrac-
tion capacity at
2400 h/a [W/m²]
Dry, non-cohesive
soil
10 8
Cohesive soil, moist 25 20
Water-saturated soil,
sand/gravel
40 32
Extraction capacity for deep trench laying (acc. to VDI
4640):
Soil conditions Max. spec. extraction capacity at
1800 h/a
[W/m], deep trench
Cohesive soil, moist 100
Water-saturated soil,
sand/gravel
125
Extraction capacity for geothermal probes (acc. to VDI
4640):
Soil conditions Max. spec. extrac-
tion capacity at
1800 h/a [W/m]
Max. spec. extrac-
tion capacity at
2400 h/a [W/m]
Dry sediment 25 20
Shale, slate 45 35
Firm rock with high
thermal conductivity
84 70
Substratum with high
groundwater flow
65-80 55-65
»
Carry out the connection to the brine circuit in such a
way that flushing or venting of the brine circuit is pos -
sible at any time.
»
Avoid routing the lines in the vicinity of bedrooms.
The heat transfer medium can produce noise emis-
sions in the brine lines under certain operation
conditions.
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Information
Ensure that the flow velocity in the pipe network
does not exceed 0.8 m/s, as this can cause in-
creased noise emissions.
For reliable operation, observe a temperature dif-
ferential of 3 K between the evaporator inlet and
outlet.
9.2.2 Preparing the wall conduits
For the brine lines, ensure that there is an appropriate
and system-specific wall conduit through the exterior wall
of the building.
»
Ensure that the wall conduits are constructed in an
appropriate, plant-specific manner.
»
Take the construction of the wall (tiles, concrete) into
account.
»
Take the prevailing groundwater situation into
account.
Material damage
Inadequate wall conduits can cause significant
damage to property, due to water penetrating the
building or stonework (seepage, condensation,
flood water). Where the wall conduits are created
below ground level, the breach must be appropriate
to local conditions at the site (e.g. non-accumulat-
ing or accumulating seepage water, groundwater
under pressure).
»
Use a suitable pipe liner or wall sleeve for the
wall conduit.
»
Tie the external end of the wall conduit in to
the external waterproof seal of the building.
»
Ensure that the pipe liner is arranged with a
slight fall (at least 2%) to the outside.
»
On both the outside and inside edge of the
wall, use appropriate ring seals to seal the
space between the wall sleeve and the brine
lines passing through.
Material damage
PU foam is not suitable as a sealant for the pipe
liner.