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PMEN0645 rev.0 - 04/2023
5
WATER PIPING
REFRIGERANT PIPING
◆ Domesc hot water tank
If a domesc hot water tank has been installed, perform the following operaons:
Heang coil circuit
Fill the DHW tank heang coil from the space heang circuit lling in point. Follow the instrucons
explained in the “5.3.2.1 Water lling” chapter to correctly perform the operaon.
! CAUTION
• Check that the heang coil pipes are correctly connected between indoor unit and tank before
lling the tank’s heang coil.
• Ensure the correct water quality of the indoor unit water circuit.
Domesc hot water tank and DHW circuit
1 Open the outlet water taps of the DHW installaon one aer each other, to expel all the air
from inside the water circuit.
2 Open the main DHW inlet valve in order to ll the tank. If there is a shut-down valve installed in
the DHW outlet, open it to allow circulaon through the DHW installaon.
3 When water begins to ow from the outlet water taps of the DHW installaon, close all these
taps.
4 Finally, close the main DHW inlet valve when the pressure reaches approximately 6 bars.
! CAUTION
• Check carefully for leaks in the water circuit, connecons and circuit elements.
• Check that the water pressure in the circuit is lower than 7 bars.
• A pressure and temperature relief valve should be installed at the DHW inlet connecon (See
“5.4.4.3 Addional hydraulic oponal elements (For DHW)” secon). If it is the case, manually
operate its relief valve to ensure that the water ows free through the discharge pipe.
• Fill in the circuit with tap water. The water in the heang installaon must comply with EN
direcve 98/83 EC. Non-sanitary controlled water is not recommended (for example, water
from wells, rivers, lakes, etc.)
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