EN
35
EN
Waste water
drainage (drains)
Mains water
inlet
Water meter
General valve
Pressure reducer
Safety unit
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Safety unit
The safety unit is a mandatory accessory. Its role
is to maintain an interior water pressure of 7 bar
(0.7 MPa) to prevent explosion (it fulls the same
role as a valve on a pressure cooker).
The safety unit therefore lets water escape when
the water heater is operational. This ow may
represent up to 3% of the volume of the water
heater cycle.
Caution: the safety unit must always be directly
connected to the tank’s cold water tank. Nothing
should be tted between the safety unit and the
water heater. (no valve, no pressure limiter, etc.).
Pressure reducer
The pressure reducer is an additional accessory
which should be installed at your water meter’s
outlet if the water pressure in your house is greater
than 5 bar (0.5 MPa)
.
It prevents the safety unit’s
valve from opening errati-
cally when the water hea-
ter is not operational.
To determine the water
pressure in your house.
You can nd out more
from your water supplier
Warning: the pressure limiter must never be
positioned between the safety unit and the cold
water inlet
General installation diagram
Example with a vertical wall-mounted water heater
Installation Manual: Overall assembly diagram
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