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EN
661Y1000 • F
INSTALLATION
DOMESTIC HOT WATER
CONNECTION
The installation of a safety unit
iscompulsory.
To avoid water discharge on to the
tank, the safety unit must never
be installed above the tank.
In certain countries the domestic
kits must be approved and
included a temperature and
pressure relief valve fitted in the
hot outlet.
The circuit illustrations are basic
principle diagrams only.
To avoid any risk of corrosion,
connect the stainless steel tank
directly to the earth.
Hot water can burn!
ACV recommends using
apre-set thermostatic mixer
valve in order to provide hot
water at a maximum of 60°C.
Recommendations
The tank’s cold water supply pipe must
be fitted with a safety unit that includes
at least: an isolating valve (1), anon-re-
turn valve (3), a domestic safety valve
calibrated to 10 bar (5) and an expansion
vessel (4) of suitable size.
When the operating pressure exceeds
6 bar, a pressure reducer (2) must be
installed before the safety unit.
Union fittings are recommended for the
easy dismantling of the DHW connec-
tions. Ideally, the “dielectric” version is fa-
vourable to protect theconnections from
corrosion with the presence of different
metals such ascopper and galvanised
steel.
The installation of a domestic expansion
vessel avoids discharge from the safety
valve (loss of water).
Capacity of domestic water vessels:
5 Litres: for models: 100 / 130
8 Litres: for models: 160 / 210
12 Litres: for model: 240
Refer to the manufacturer’s
technical instructions on the
expansion vessel for more details.
Connection to the DHW circuit
1. Isolating valve
2. Pressure reducer
3. Non-return valve
4. DHW expansion vessel
5. Safety valve
6. Drain down valve
7. Air vent valve
8. Hot water outlet
9. Pressure gauge
10. Earth connection
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