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8.4 Water-side connection
NOTES
► For a complete overview of the system,
see §8.1.
► Connect the indoor unit to an ErP
compliant boiler.
► Open vent conversions are not suitable
for connecting to the Xtend.
► The indoor unit, outdoor unit and
existing boiler must be positioned as
close together as possible.
► The pipework distance between the
indoor unit and the boiler must be kept
as short as possible.
► The pipework must be drained down
before installation to prevent spillages
and damage to the surroundings.
► There must be a 400 µm filter installed in
the return heating line to the indoor unit,
the Intergas system filter is preered.
► Install shut-o valves between the indoor
unit and the heating circuit in order to
allow for maintenance work and other
interventions.
► Install a full flow non-return valve in the
return pipe to the boiler.
► The entire system must be equipped
with an expansion vessel. (Some boiler
models incorporate a vessel, however the
capacity should be checked against the
system volume)
► The boiler incorporates a suitable 3bar
PRV.
Installation example
Heating return
Heating flow
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