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3. installation
3.2.4 Gas connection
Make sure, using the labels on the packaging and the data
plate on the appliance itself, that the boiler is in the correct
country and that the gas category for which the boiler was
designed corresponds to one of the categories available in the
country where it will be used.
The gas supply piping must be created and measured
out in compliance with specifi c legal requirements and in
accordance with the maximum power of the boiler; you should
also make sure that the shut-off valve is the right size and that
it is connected correctly.
Check that the supplied gas corresponds to the type of gas for
which the boiler was designed (see the data plate located on
the appliance itself).
It is also important to check that the pressure of the gas
(Natural Gas or LPG) you will be using to feed the boiler is
suitable, because if it is insuffi cient the power may be reduced,
causing inconvenience for the user.
3.2.5 Water connection
The illustration below shows the connections for the water
and gas attachments of the boiler. See valves confi guration
on page 14.
Check that the maximum water mains pressure does not
exceed 6 bar; if it does, a pressure reducing valve must be
installed.
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 fl ow rate, in accordance with
the values shown in the circulation pump graph.
F
A
I
Fig. 3.8
A. Central heating Flow
B. Domestic Hot Water Outlet
C. Gas Inlet
D. Domestic Cold Water Inlet
E. Central Heating Return
F. Safety Valve Discharge
H. Drain Valve
I. Drain condensate
14
E
D
C
B
H
To calculate the size of the heating installation, refer to the
"Available pressure" graph below.
3.2.6 Graph representing the available circulation pump
o
pressure ΔT20
C
mCE
7,0
6,0
5,0
4,0
3,0
2,0
1,0
0,0
0
100
200
300
400
500
Before the equipment is used, for the fi rst time the trap
must be fi lled with water. To do this, add approximately
1/4 litre of water via the fl ue outlet before fi tting the
fl ue system, or unscrew the cap on the trap positioned
underneath the boiler, fi ll it with water and refi t it
Warning! Insuffi cient water in the trap can temporarily
cause the fl ue gas to be expelled into the surrounding
ambient air
I
EGIS HE 30
EGIS HE 24
600
700
800
900
1000 1100
1200 1300
Fig. 3.9
Fig. 3.10
l/h
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