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Installation
A Class HP Installation a
nd User Instructions R02583
-6 09/15
Page
13
5 Installation
5.1 Cold Water Inlet with Inlet
Control Group
5.1.1 Correctly Site the Cylinder
Install the cylinder in an appropriate location,
ensuring all of the recommendations have been
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 and can be connected directly to
the cold water inlet group, utilising the flexible
hose supplied with the vessel. The expansion
vessel should always be fitted in accordance
with the manufacturer’s instructions. Isolating
device/s must not be fitted between the water
cylinder, the expansion vessel 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 maintaining and
replacing the expansion vessel.
Figure 4: Connection Of The Expansion Vessel To The
Inlet Group
It is important to check the pre-charge
pressure of the expansion vessel
membrane before filling the cylinder. This
has been factory set to 3 bar. The pre-
charge should be greater than or equal to
3bar.
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 and the
expansion vessel connected, as shown in
Figure 5.
Figure 5: Detail Showing The Connection Of The
Expansion Vessel To The Inlet Group
5.1.4 Balanced Cold Water Supply
If a balanced cold water supply is required
(recommended) a connection can be taken from
the bottom of the inlet group.
5.1.5 Drain Valve
It is also recommended to install a drain valve
in the lowest point of the cold water feed to the
cylinder. This allows the cylinder to be drained
in a controlled manner should this become
necessary.
Expansion
Vessel
Connection
Balanced
Cold Water
Supply
Expansion
Relief
Valve
Cold
Water to
Cylinder
Cold
Water
from
Mains
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