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4.5 Limitations
Due to the operating temperatures of
direct electric water heaters the water
hardness can considerably influence
the longevity of the immersion heater
element. Please consult local water
board
for
advice
intervals.
5 Installation
5.1
Cold Water Inlet with
Inlet Control Group
5.1.1
Correctly
cylinder
Install the cylinder in an appropriate
location,
ensuring
recommendations
considered (see chapter 4.2).
5.1.2
Install the inlet group
The inlet group regulates the pressure
of the incoming mains water supply to
the cylinder and removes any debris
that might be water borne.
Note: Between the inlet group and
the cold water inlet on the cylinder
NO isolating device may be fitted,
as by doing so important safety
devices could be isolated!
5.1.3
Expansion vessel
The expansion vessel is mandatory on
all
EC-Eau
cylinders
connected directly to the cold water
inlet group, utilising the flexible hose
supplied
with
the
expansion vessel should always be
fitted
in
accordance
manufacturer's
isolating device must be fitted between
on
maintenance
site
the
all
of
the
have
been
and
can
be
vessel.
The
with
the
instructions.
No
Installation
the water cylinder and the cold water
inlet group.
Furthermore, it is recommended to
mount the vessel higher than the
cylinder to avoid having to drain the
cylinder
when
replacing the expansion vessel.
Figure 4: Connection of the expansion
vessel to the inlet group
It is important to check the
pre-charge
expansion vessel membrane
before filling the cylinder. The
pre-charge should be greater
than or equal to 3 bar.
Note: The expansion vessel must
be installed to the side of the
expansion relief valve on the inlet
group. To do this the blanking plug
must
be
removed
expansion vessel connected, as
shown in Figure 5.
maintaining
and
pressure
of
the
and
the
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