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INSTALLATION
4.10 Water circuit
WORKING PRESSURE
The maximum working pressure of the boiler is 6 bar (600 kPa)
whilst the minimum is 0.5 bar (50 kPa)..
9
It is compulsory to install devices along the topping up/sup-
ply line as well as the water circulation system to protect the
installation from pressures exceeding 550 kPa, in conformity
to prescriptions given in the EN 60335-2-102.
9
Do not expose the exchanger to cyclic changes in pressure as
fatigue stress does a lot of harm to the system components.
Should the water system suddenly start generating changes
in pressure it is compulsory to use the protection devices to
make the boiler work at a regular pressure.
9
Installation pressure control must be done under cold con-
ditions.
FILLING UP THE BOILER
The boiler must be filled up by connecting the water from to the
mains to any part of the installation.
9
It is compulsory to use a standard filling device (EN61770
type) for coupling up to the mains specifically preventing
the back-flow of liquid from installation to water mains.
EMPTYING THE BOILER
Emptying of the system is made by acting on the discharge
valves of each unit and in some points of the hydraulic system
specific for this purpose.
For more information on the characteristics of hydraulic system
see"5 Installation diagrams" in which different types of plant
are shown.
4.11 Exhaust flue
The chimney should be as straight as possible, sealed and iso-
lated. Should not have occlusions or narrowing.
The overall potential of thermal groups Condexa Pro2 EVO Series
is more than 35 kW, so they can be installed only in rooms that
have venting opening to the outside according to actual law
(italian D.M. 12.04.1996).
Figure 8
9
The Condexa Pro2 EVO series generators must be connected
to a exhaust pipe system in flame retardant polypropylene
(PP) or suitable materials according to UNI EN 677 and asso-
ciated standards.
0
DO NOT for any reason use piping not specifically designed
for this specific scope as the condensing action could cause
rapid degradation.
The boiler must be connected to the installation with a plastic
pipe Ø160 PP . The maximum equivalent length of the smoke
installation is shown in the following table:
Installed power (kW)
150
225
300
0
In the event of installation with air intake from the premises
(both in the heating unit and externally) avoid obstructing
the passage of air under the metal cupboard.
10
Maximum pipe length in meters
With Ø 160
60
60
30
With Ø 200
-
-
60
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