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We reserve the right to modify technical specifications without prior notice.
83050700aUK – Translation of the operating manual
© Alpha-InnoTec GmbH
area of use and
heat source requirements
Taking into consideration the ambient conditions, limits
of use and the relevant regulations, every heat pump can
be used in new or existing heating systems.
“Technical data / scope of delivery” overview,
Water temperature / Water quantity
The water in the extraction well of the heat source
system must have a minimum temperature of 7 °c all
year round and may not exceed a temperature of 25°c.
depending on the heat output required or its cooling
capacity as a relevant variable for dimensioning the heat
source, a minimum water rate is required, which must
be provided by the heat source as a continuous output.
before installing the water/water heat pump, a pump test
should/must be carried out for at least 12 hours with
verification of a quasi-constantly lowered water table
(persistence) in order to provide information about
the quantity of water available. For efficient operation
of the well, during the initial start-up the nominal flow
rate must be adjusted on the heat source side. Any
appropriate components, which enable balancing are
to be installed in the pipe network here. The material
of the components used must be chosen according to
the water quality. The necessary flow rate (heat source
water rate) must meet the heat pump's requirements.
“Technical data/scope of supply” overview.
Water quality
In Germany the well must be designed and built to dIn
4021 and vdI 4640 (in other countries according to the
corresponding regulations). Wells may only be drilled
and built by drilling companies with a permit in accord-
ance with dvGW W120. The water quality of the heat
source is defined as normal groundwater. Ensure that
the suction and return pipe always extends below the
water level by sufficient depth, to ensure that oxygen
is not added to the water (risk of iron oxide deposits).
please discuss the problem of iron oxide deposits with
your well builder. during the planning the quality of the
groundwater should be checked in advance as well as
possible (e.g. by asking the competent water authority
or searching for data on existing adjacent wells) and sub-
sequently verified by water analysis in the built produc-
tion well. The following table helps to assess the water
quality.
Important
A water analysis and pump test must be carried
out before installing the water/water heat pump.
note:
Water analyses are prepared by water test labo-
ratories. Initial information about possible use of
groundwater is available from your local water
management authority. A pump test provides
information as to whether a sufficient quantity
/ rate of water is available to cover the require-
ments for the heating output of your unit. The
minimum groundwater flow rate must at least be
available as a continuous output.
“Technical data/scope of supply” overview,
“Heat source flow rate” section.
evaluation of the Water analysis
Water constituents - minimum requirement. The water
should be analysed in advance for the test values listed
below (table). An important criterion to be used for
taking water samples is the dvGW Standard, Technical
notices, leaflet W 112 and use of the technical rules
listed in it (dIn, En and ISo standards).
Designation
Limit
pH value
> 6.8
Iron level
< 0.2 mg / l
Manganese level
< 0.1 mg / l
Chloride level
< 300 mg / l
Free chlorine level
< 3 mg / l
Turbidity
none
Technical freedom
from sand
< 0.1 mg / l sand per
10 l pumped water
Important
If a value does not conform to the value listed
in the table, a water/water heat pump may not
be used. direct operation of the unit in conjunc-
tion with surface water, wastewater, industrial
wastewater or mixtures of water and alkali solu-
tions, acids or chlorine is also not allowed.
