5.7
Filling the installation
5.7.1
Cleaning and flushing the installation
Flushing new installations and installations less than 6 months
old
Before filling the heating installation, it is essential to remove any debris
(copper, caulking, soldering flux) from the installation.
1. Clean the installation with a powerful universal cleaner.
2. Flush the installation with at least 3 times the volume of water
contained in the central heating system (until the water runs clear and
shows no impurities).
Flushing an existing installation
Before filling the heating installation, it is essential to remove any sludge
deposits which have accumulated in the heating circuit over the years.
1. Remove any sludge from the installation.
2. Flush the installation with at least 3 times the volume of water
contained in the central heating system (until the water runs clear and
shows no impurities).
5.7.2
Filling the heating circuit(s)
The heating installation can be filled once it has been cleaned and flushed.
Important
Do not use glycol. The use of glycol in the heating circuit
invalidates the warranty.
1. Open the valves for the heating circuits on the connection plate.
2. Open the air vents.
3. Open the disconnector valve (to the FILL position) to start filling.
4. Monitor the pressure on the mechanical pressure gauge.
Important
The mechanical pressure gauge is located to the right of the
control panel and is only used when filling the indoor module with
water. After the heat pump is started on, the pressure is shown on
the display.
5. When the pressure is between 1.5 and 2 bar, close the disconnector
valve to stop filling.
6. Check for any water leaks.
7. Completely vent the indoor module and the installation for optimum
running.
Treatment of the heating water
In many cases, the heat pump and the heating system can be filled with
mains water, without treating the water.
Caution
Do not add any chemical products to the heating water without
first consulting a water treatment specialist. For example:
antifreeze, water softeners, products to increase or reduce the pH
value, chemical additives and/or inhibitors. These may cause
faults in the heat pump and damage the heat exchanger.
The water in the installation must comply with following characteristics:
Tab.22 Heating water specifications
Specifications
Unit
Total system output
≤ 70 kW
Hydrogen potential (pH)
7.5 - 9
Conductivity at 25°C
μS/cm
10 to 500
Fig.46
MW
-3
0
0
0
7
4
3
-0
2
3
5 Installation
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