3. Calculate the volume of water in the heating circuit and check the
volume of the appropriate expansion vessel. Use the maximum
temperature of the circuit in heating mode or, failing that, a minimum
of 55 °C. If the volume of the integrated 10-litre expansion vessel is
not sufficient, add an external vessel to the heating circuit. Refer to
the applicable local and national regulations.
4. Connect the heating return for the indoor unit. Place the pressure
gauge and its pipe on the heating return. The pressure gauge is
supplied with the indoor unit.
5. Connect the heating flow for the indoor unit.
Caution
To avoid twisting the pipes inside the appliance, hold the nuts on
the indoor unit side using a spanner.
6.6.3
Connecting the safety valve drain pipe
1. Connect the outlet pipe to the waste water discharge.
Caution
The discharge pipe in the safety valve or unit must not be blocked.
6.7
Refrigeration connections
6.7.1
Preparing the refrigerant connections
Danger
Only a qualified professional may carry out the installation in
conformity with current legislation and standards.
To allow exchanges between the indoor module and the outdoor unit, fit 2
refrigerant connections: flow and return.
Pursuant to European Regulation 517/2014, the equipment must be
installed by a certified operator whenever the refrigerant load is in excess
of 5 tonnes of CO
2
equivalent or when a refrigerant connection is
necessary (the case with split systems, even when fitted with a quick
coupling device).
1. Install the refrigerant connection pipes between the indoor module
and the outdoor unit.
2. Respect the minimum curve radii of 100 to 150 mm.
3. Adhere to the minimum and maximum distances between the indoor
module and the outdoor unit.
4. Cut the pipes with a pipe cutter and deburr.
5. Angle the opening in the pipe downwards to ensure no particles can
get inside, while preventing oil traps.
6. If the pipes are not connected immediately, plug them to prevent
moisture from entering.
Fig.27
MW-1001199-1
4
Fig.28
MW-1001200-1
Ø32
1
6 Installation
32
7762758 - v05 - 19082020
