Hydraulic Installation; General Instructions; Source Circuit - GeoSmart NETZERO BW Manuel D'installation

3. Hydraulic installation

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The installation schemes included from here on should be considered simply as a guide.
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The design of the hydraulic installation must be performed by qualified personnel and in accordance
NOTE
with applicable local regulations.

3.1. General instructions

The following recommendations should be taken into consideration for proper hydraulic installation.
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Avoid excessive strain between the pipes and the heat pump connections to prevent leaks and/or transmission of vibrations.
Flexible hoses should be used for heat pump connections.
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Install cut-off valves at all the hydraulic connections to facilitate future maintenance tasks.
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Install traps at all the installation points where air pockets can form.
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Place heat insulation on all circuit pipes to prevent unnecessary heat loss. Pay special attention to the heating insulation on
the source circuit pipes, since these can reach temperatures below 0ºC, causing condensation and/or frost.
D
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uring installation work on the hydraulic circuits, take special care to prevent liquid from spilling on
DANGER!
the internal electrical heat pump components, which could cause personal injury due to electrocution
and/or poor equipment operation.
D
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o not install components that might cover the inlet or outlet of the safety valves; this could lead to a
risk of some of its components breaking and cause injuries and/or material damage.

3.2. Source circuit

The NETZERO heat pumps can be used with horizontal or vertical (A) geothermal source systems or by using ground-water (B).
Aerothermal source can also be used by replacing the geothermal collector with one or more NETZERO AU12 aerothermal units (C).
Finally, hybrid collection can be obtained by combining a geothermal collector with one or more NETZERO AU12 aerothermal units
(D).
Ground-loop application (Geothermal source systems)
Source systems with more than one circuit must be connected in parallel, so the flow rate through each one is similar.
Ground-water application (Groundwater or aquifers source systems)
Groundwater source systems must use a midway exchanger to prevent the heat pump evaporator from corrosion, freezing or getting
dirty.
Hybrid source systems
In hybrid source installations, the aerothermal collector and the geothermal collector must be connected in series so the antifreeze
mixture circulates first through the aerothermal collector and then through the geothermal collector.
On the other hand, open / close 3-way valves must be installed between the outlet and return of each collector so the collector can
be bypassed when it is not in use.
GEOSMART ENERGY 12
Installer manual NETZERO