Cooling - Panasonic Aquarea WH-ADC0309J3E5 Planning And Installation Manual

Product Description
CAUTION
Danger of illnesses due to growth of Legionella in water
Legionella can grow in hot water tanks, and can cause infectious diseases in humans.
► Respect European and national requirements for avoiding Legionella multiplication
ATTENTION
Danger of damage to water tank due to inadequate water quality
If the contents of chloride and sulphate exceed 250 mg/l, water pretreatment is required. The
warranty is invalidated at values above 250 mg/l.
► When using the Panasonic hot water tank, make sure that the water quality conforms to
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4.4.3 Cooling

The cooling mode is switched on manually through the operating panel or the wired remote
controller or automatically through defined temperature threshold values. Switching to heating
mode is also done manually at the end of the cooling period or automatically using the defined
temperature threshold.
Space cooling is possible through surface-embedded systems such as floor and wall heaters,
cooling ceilings or particularly using fan coils. Individual heating circuits that are not suitable for
cooling mode can be disabled by control through a 2-way valve. For all transfer systems, in the
cooling mode at high humidity, the temperature on the surface could fall below the dew point,
which can cause condensation of water. This should be prevented especially in surface-embedded
systems either by using a dew point sensor to control the supply water temperature and increase
it by mixing supply water with return water as needed, or by switching the cooling mode off if
required. Fan coils can be operated with much lower supply water temperatures, compared to the
use of surface-embedded systems for cooling mode, and therefore have greater cooling capacities.
However, fan coils for cooling mode must always be fitted with a condensation drain and have
tubes with diffusion-proof heat insulation.
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(example in Germany: DVGW Worksheet W551). For domestic hot water tanks with more
than 400 litres volume as well as in buildings with more than two residential units, there
may be higher requirements than for one- and two-family houses.
Directive 98/83/EC on drinking water quality.
Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022