6.3.1
Connecting the water circuit for domestic use
Warning
When making the connection, it is imperative that the standards
and corresponding local directives be respected.
Specific precautions
Before attaching the connections, flush the domestic water inlet pipes to
prevent metal or other particles from entering the appliance's tank.
Caution
Do not connect the domestic hot water connection directly to
copper pipes in order to prevent galvanic couplings in iron/copper
(risk of corrosion).
It is compulsory to fit the domestic hot water connection with a
dielectric union (provided).
Install the second dielectric union delivered on the domestic cold
water inlet.
Safety valve or safety unit
Caution
Germany: In accordance with the safety regulations, a safety
unit calibrated to 0.6 MPa (6 bar) must be fitted on the domestic
cold water inlet on the domestic hot water tank.
Belgium: In accordance with the safety regulations, a safety unit
calibrated to 0.7 MPa (7 bar), and approved by Belgaqua, must
be fitted on the domestic cold water inlet on the domestic hot
water tank.
Italy: in accordance with the safety regulations, a safety unit
calibrated to 0.7 MPa (7 bar) must be fitted in accordance with
the EN 1487 standard.
Other countries: In accordance with the safety regulations, a
safety unit calibrated to 0.7 MPa (7 bar) must be fitted on the
domestic cold water inlet on the domestic hot water tank.
Install the safety valve close to the domestic hot water tank in a place with
easy access.
Important
Safety valve: 7 bar (0.7 Mpa)
Sizing
The diameter of the safety unit and its connection to the domestic hot
water tank must be at least equal to the diameter of the domestic cold
water inlet on the tank.
There must be no cut-off devices between the safety valve or unit and
the domestic hot water tank.
Do not obstruct the discharge pipe for the safety unit or valve.
To avoid restricting the flow of water in the event of overpressure:
The safety unit discharge pipe must have a continuous, adequate
gradient.
The cross section of the discharge pipe from the safety unit must be at
least equal to the cross section of the opening on the safety unit outlet.
Isolation valves
Hydraulically isolate the primary and domestic circuits with isolation valves
to facilitate maintenance on the domestic hot water tank. The valves make
it possible to carry out maintenance on the domestic hot water tank and its
components without draining the entire installation.
6 Installation
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7740321 - v04 - 03122019
