EN
25
EN
Waste water
drainage (drains)
Mains water
inlet
Water meter
General valve
water heater tank
Pressure
reducer
Safety
unit
È
È
0000000
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 fulfils the same
role as a valve on a pressure cooker).
The safety unit therefore lets water escape when
the water heater is operational. This flow 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 fitted 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
erratically when the water
heater is not operational.
To determine the water
pressure in your house you
can find out more from
your water supplier.
Warning: the pressure limiter must never be posi-
tioned 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
