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3.5. Hydraulic connection
3.5.1. Connection to cold water and hot water ductwork
The "cold water inlet" and "hot water outlet" connections must be fitted with dielectric connectors (supplied with the
equipment). They are intended to prevent galvanic couples and limit the risks of corrosion. Our warranty may not be
valid if these connectors are missing.
Mounting of dielectric connectors with seal or sealing paste; watch out for the torque applied when tightening (do
not apply a torque of more than 25 N.m).
To facilitate any maintenance work, plan for shut-off valves (not supplied) on the cold water inlet (before the safety unit) and
the hot water outlet.
3.5.2. Cold water connection
Stipulations to be followed:
• For areas where water hardness exceeds 40°fH, a water softener or other system limiting the hardness to 40°fH must be
provided. Using a water softener does not waive our warranty, provided that the water softener is set in accordance with best
practices and regularly checked and serviced. In this case, the water hardness must be more than 15°fH.
• Mandatory earthing of water pipes.
• Well water is not allowed.
Clean the supply ducts well before making the connection to avoid introducing any foreign bodies into the water heater tank.
The installation must be fitted with a new safety unit (not supplied) pre-set to 7 bar and compliant with standard NF
EN 1487.
No equipment (valve, pressure reducing valve) must be placed between the safety unit and the tank's cold water connection.
Water can flow from the safety unit during heating. A connection to the wastewater must be planned that is kept frost free
and which slopes continually downwards with a water trap. As water can flow from the pressure limiter discharge pipe, the
discharge pipe must be kept open to the open air.
The installation must have a pressure reducing valve (not supplied) if the supply pressure is higher than 0.45 MPa. The
pressure reducing valve must be installed at the general distribution output.
3.5.3. Hot water connection
It is strongly advised to insulate this ductwork. It is forbidden to create a DHW loop - this type of installation greatly
increases thermal losses.
Reminder of the French regulations: to limit the risks of burns, the water temperature at the discharge points must not
exceed 50°C in bathrooms or WC and 60°C in other rooms.
It is advisable to install one or more temperature limiters (not supplied).
Where the distribution ductwork is made of synthetic material (like PER), it is advisable to install a temperature limiter
at the tank outlet. The distribution temperature will be set according to the material characteristics.
In accordance with DTU 60.1, and given the cut-off value
of the thermal circuit cut-off, these devices can reach water
temperatures higher than 80°C in certain configurations.
They cannot therefore be connected directly to pipes made of
synthetic materials. In this case, a copper pipe at least 50 cm long
must be inserted at the hot water outlet of the devices.
Refer to the layout diagram (1.5) for detailed dimensions.
Identical for T.Flow
Nano
®
Front panel
49
EN
Hot water connection
Cold water connection
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