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5.9 Heat source brine connection
The sizing and installation of the brine collector is
the responsibility of the installer and is to be car-
ried out according to OCHSNER guidelines. The
heat source connection is to be executed in such a
way that the brine circuit can be flushed and/or
bled at any time. The amount of heat carrier fluid
required is to be calculated beforehand. This is a
product of the pipework length and pipe dimen-
sion as well as the heat pump water content The
heat carrier fluid is to be poured into a clean con-
tainer in one pour and well stirred.
Ethylene glycol in a mixture of 25%-30% by volume
is to be used as anti-freeze, this providing protec-
tion down to –12 to –15°C.
The anti-freeze fluid must not be mixed with ag-
gressive raw water (pH-value below 7.0), distilled
water
or rain water.
NOTE:
As the protection against corrosion de-
creases in the course of time, a two-
yearly water quality check is recom-
mended
The frost protection, the pH-value, as well as the
rest alkalinity are to be checked. This check is to
be carried out with a representative quantity (for
instance. 3x 1/4l). The correct mix relationship is
to be tested with a refractometer. The filling is to
be carried out in such a way as to ensure the
proper bleeding of the system
In order to ensure a reliable operation,
a temperature difference of 3K
between the evaporator (heat source)
flow and return
is to be maintained.
The flow rate in the pipe-network must
not exceed 0.8 m/s. (noise/resistance).
BA OCHSNER AQUA TERRA_EN_V01.1.docx
5.10 Flow rate metering brine
The flow rate meter is part of the heat pump and
must be installed by the system installer according
to the OCHSNER installation guidelines. Please ob-
serve the instructions in the installation manual
for flow rate measuring meters. If the flow rate
meter is either not installed, or incorrectly in-
stalled, OCHSNER will not undertake the commis-
sioning of the system.
OCHSNER accepts no liability for possi-
ble damage which may occur if the flow
rate meter is either not installed, incor-
rectly installed, sized or wired up.
Fig. 14: Flow meter installation in heat source brine system
5.10.1 Collection shaft
If a collection shaft is to be installed, a
lined conduit with a slope towards the collecting
shaft
is to be used.
Fig. 15: Collection shaft
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