Dhw Circuit - GeoSmart NETZERO BW Manuel D'installation

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The hydraulic installation must ensure that while the boiler is operation, the temperature through the
heat pump never exceeds 65ºC, since this could cause serious damage to the refrigerant circuit.
NOTE
Integrated components
The following heating / cooling circuit components are included within the heat pump.
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Variable speed and high efficiency pump (energy class A).
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Expansion vessel with a capacity of 12 litres, with pre-adjusted pressure of 1,3 bar (130 kPa).
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Safety valve loaded at 3 bar (pressure gauge) (300 kPa).
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Drain valve.
Installation instructions
Follow the instructions below to connect the heating / cooling circuit.
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Install a particulate filter in the return pipe with a mesh size no greater than 1 mm. It is recommended to install shut off valves
immediately before and after the filter to make it easier to clean or replace.
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Check that the volume of the expansion vessel integrated in the heat pump is capable of absorbing any overpressures from
the circuit. If this volume is not enough, install a supplementary external expansion vessel.
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If necessary, adjust the pressure of the expansion vessel integrated in the heat pump to guarantee that the circuit remains
pressurised at all points.
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If there is an auxiliary system integrated in the heating storage tank, install a safety valve to protect it from any overpressures.
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Heating / cooling circuit pressure should be between 0,7 and 2 bar (pressure gauge) (70 and 200 kPa).

3.4. DHW circuit

NETZERO CW Models
The NETZERO CW heat pumps are provided with an integrated inter storage tank with a capacity of 165 litres, so it does not require
the installation of an external DHW storage tank.
NETZERO BW Models
The NETZERO BW heat pumps are designed to be used with external storage systems with a midway heat exchanger that can be
either internal or external.
DHW Recirculation
This is used to control a DHW recirculation pump. The storage tanks included in the NETZERO CW models are provided with a separate
inlet for DHW recirculation. If an external storage tank without a separate inlet for DHW recirculation is used, it is recommended to
connect recirculation to the cold water inlet pipe.
Auxiliary equipment integrated in the DHW storage tank
This is used to control a support system integrated in the DHW storage tank. This can be used as support to reach higher temperatures
during normal production, to carry out legionella protection programs or as emergency equipment.
GEOSMART ENERGY 17
Installer manual NETZERO