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Residual Head of the Boiler ∆T 20°C
7
6
5
4
3
2
1
0
0
100
200
300
400
For the measuring of the pipes and of the heating bodies in the
heating system, the residual head value should be calculated as a
function of the requested ow rate, in accordance with the values
shown in the circulation pump graph.
E
c x
s e
i s
e v
r p
s e
u s
e r
d
e
i v
e c
Fit the drain pipe for safety valve "F", included in the hydraulic kit.
The excessive pressure device outlet (see Figure) must be connected
to a drainage siphon which can be checked visually in order to
prevent maintenance procedures causing harm to people, animals
or property (the manufacturer shall not be held responsible for any
such damage).
Cleaning the heating system
Where the boiler is used in conjunction with an older system, various
substances and additives may be present in the water and these
could have an adverse e ect on the operation and durability of the
new boiler. Before replacing the old boiler, you must arrange for the
system to be cleaned thoroughly in order to eliminate any residue
or dirt which could compromise the correct operation of the water
heater. Make sure the capacity of the expansion vessel is suited to the
amount of water contained in the system.
Under oor heating
For appliances with under oor heating, t a safety thermostat onto
the under oor heating outlet. For the electrical connection of the
thermostat see the section on "Electrical connections".
If the outlet temperature is too high, the boiler will stop both do-
mestic hot water and the heating production and the error code
1 16 " oor thermostat contact open" will appear on the display. The
boiler will restart when the thermostat is closed during automatic
resetting.
If the thermostat cannot be installed, the under oor heating equip-
ment must be protected by a thermostatic valve, or by a by-pass to
prevent the oor from reaching too high a temperature.
EGIS PREMIUM S 25
EGIS PREMIUM S 31
500
600
700
800
900
(l\h)
Discharge of condensation
High energy e ciency produces some condensation which must
be removed. To do so, use a plastic pipe placed so as to avoid the
accumulation of any condensation inside the boiler or the discharge
pipes).
This pipe must be attached to a discharge siphon which can be
checked when required (comply with the diameters shown in the
gure below).
This condensing boiler does not have the neutralizing device for the
acidic condensate, so please take care and drain the condensate into
nonmetallic pipe.
The standards governing installation currently in force in the country
of installation must be respected, as must any local authority
regulations or those issued by public health bodies.
1000
Before the rst time the equipment is used, the siphon must be lled
with water. To do this, add approximately 1/4 litre of water via the
burnt gas outlet before tting the discharge device, or unscrew the
siphon positioned underneath the boiler, ll it with water and re t it.
Warning! insu cient water in the siphon can cause the
ue gas to be expelled into the surrounding ambient air.
Ø 15mm
(interno)
'
Ø 22 mm
installation
33
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