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00U07352240-A_ EN
01-07-2022
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1.2.4. Recommendations for hydraulic and electrical circuits
■
Hydraulic connections
The connection must comply with good engineering practices according to the regulations
in force.
Reminder: Make the assembly seals according to good engineering practices in force
for plumbing work:
-
Use suitable seals or gaskets (fibre seals, O rings).
-
Use Teflon or hemp tape.
-Use sealant (synthetic as required).
■ Characteristics of the water for the appliance
To ensure that the appliance is working correctly, the water must be filtered correctly
(see the indications at the beginning of this section) and the quantity of dissolved must
be minimised. Refer to chapter 3.6.4. For further recommendations.
The maximum authorised values are as follows:
Use glycol water if the room where the primary/secondary storage tank(s) is/are installed
is not frost-free; we recommend that this situation be temporary so as not to alter the
system's performance permanently. Do not forget to flush the system once the room
is frost-free. If glycol water is used, plan an annual control of the glycol quality. Use
monopropylene type glycol only. The recommended concentration should not exceed
40%.
If glycol is not used, trace the pipes electrically outside.
•
In certain installations, the presence of different metals can cause corrosion
problems; in this case, the formation of metal particles and sludge in the
hydraulic circuit is seen.
-Please refer to the chapter "Treatment of domestic and heating water" in our price
catalogue
•
It is also necessary to ensure that the treated water does not become aggressive
for the circuit.
MAXIMUM AUTHORISED PHYSICAL-CHEMICAL CHARACTERISTICS AUTHORISED FOR THE INSTALLATION
WATER
PH
7.5 - 9
Electrical conductivity
100 - 500 μS/cm
Total hardness
8.0 - 15.1 °f
Temperature
˂ 65°C
Oxygen content
˂ 0.1 ppm
Max. quantity of glycol
40%
Iron (Fe)
< 0.3 ppm
Chlorine ions (Cl-)
< 50 ppm
