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12 WATER CONNECTION
The cold water connection must be performed according to the scheme above. The maximum allowed pressure
in the water system is 0,4 MPa, a safety valve with a maximum pressure 0,6MPa can be used. Expansion vessel
for the 230L tank needs to have at least 12L volume and for the 300L tank 18L.
Hot water connection can be directly to tap, or can be upgraded with a circulation pump. Return from the
circulation system can be connected to the connection marked with "E" in scheme "8. Unit dimensions".
During rapid water heating, a small water leakage on the safety valve can occur. This is not due to damage but
due to normal event of water expansion. This water needs to be captured and lead into drainage.
In case of a solar system or other heat source connected to the internal heat exchanger, it must be assured that
the pressure in the heat exchanger newer exceeds 0,5MPa. It must also be assured that the water does not
exceed 80°C. Damage to internal components or heat pump can occur.
In case that the additional heat exchanger is not to be used, it needs to be filled with glycol to prevent corrosion.
It is not allowed to close both sides of the heat exchanger to enable pressure equalisation.
WARNING!
Improper installation of the unit can lead to damages or malfunction of the unit and loss of rights under
warranty.
WARNING!
When connecting the unit to the heating system it is necessary to prevent the formation of a galvanic
couple and related corrosion. To connect the unit to the heating system it is MANDATORY to use the
enclosed transition pieces, also the piping system MUST be electrically grounded. In case of failure due
to improper device connection the manufacturer will take no liability or warranty.
WARNING!
Before the unit is turned on, it needs to be filled with water and the system completely vented. To do
this, open all hot water taps and wait until water starts to flow from all of them.
WARNING!
On the back side of the unit there is a pipe connection for condensate drain. At high water usage and
high air humidity, more than a few litres of condensate water per day can occur, so this connection
must be connected to outlet drainage. This pipe needs to have a constant incline of at least 1° and must
be always clean.
WARNING!
Condensate pipe must be checked and cleaned once per month.
DANGER!
The supply socket must be positioned at least 1,5m above ground level, to avoid direct water spray
causing injuries or damage. The socket must be earthed, secured with a 16A fuse and FI relay with max.
current 0,03A. The wire cable to the socket needs to be at least 3x2,5 mm, only the heat pump can be
connected to the socket.
9
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