System Planning And Preparation - LG THERMA V HN0916T Installation Manual

GENERAL INFORMATION
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System planning and preparation

The design of the system must be planned and executed by a professional HVAC installer
according to European and National regulations and Standards. The following points should be
explicitly taken into account.
CAUTION
!
• Make sure that the minimum water flow rate as given in the Specification is never
undercut. Install a Hydraulic separator, buffer tank connected in parallel to the heating
system or a bypass valve with sufficient dimension!
• If the heat pump is installed together with an external boiler, the devices should not be
operated at the same time. If operated in parallel, take appropriate measures to prevent
hot water from entering the heat pump. If the temperature is higher than the operating
range of the heat pump it can lead to malfunctions or damage the product.
• When using an Underfloor heating system:
- Respect the maximum temperature as given by the manufacturer. An independent
overheat cut-off device is recommended.
- When using underfloor cooling, the adequacy of the underfloor system must be
approved by the manufacturer.
• General recommendations for Cooling operation:
- Use diffusion resistant insulation.
- Carefully agglutinate the joints of the insulation. If air can enter between pipe and
insulation, it will get wet and useless.
- Install a 2-way-valve to block parts of the distribution system that are not designed for
cooling. Refer to chapter 3.4.13 for information how to connect the valve.
- Install external dew point monitor (relay) in combination with dry contact. The relative
humidity shall not exceed 65%.
- Use reversible control valves (heating/cooling) for individual room control (e.g. underfloor
thermostats).
• If the unit is connected to an old piping system:
- A magnetic filter should be installed in the return pipe to protect the unit from particles
that can block the heat-exchanger and damage the unit.
- If pipe diameter is too small (<1 inch) or the pipe diameter is narrowed by scaling, it can
lead to flow noise and cause problems due to limitation of water flow rate. Install a
parallel buffer tank / hydronic separator.
• Prevention of noise must be taken into account when designing the installation.
- Calculate the sound emission and respect local laws and regulations, before installing the
unit.
- Do not install the outdoor unit at an exposed position (on top of garage, high at the wall)
- If possible, prevent installation in a corner of the house or close to other surfaces that
concentrates the sound.
- Prevent structure-borne noise. De-couple the pipes. Install the units on foundations de-
coupled from the building. Use dampers.
• Make sure that enough heat is available for Defrosting. If that cannot be ensured by the
heating system, install a buffer tank.
• Carefully follow the instructions regarding Condensate drainage and frost-free installation
of pipes.