Condensate Outlet; Water Circuit; Exhaust Flue - Riello Condexa Pro3 Series Installation Instructions Manual

INSTALLATION

4.6 Condensate outlet

The condensate water produced by Condexa Pro3 IN-EXT a nor-
mal running conditions is evacuated into a special manifold.
Drainage must be done at atmospheric pressure, i.e. by dripping
into a connected drain-trap, as follows:
− install a drip at the condensate drainage manifold;
− connect the drip to the sewerage mains by a drain-trap;
− be ready to use a neutralizer where required (see project
cig E.01.08.929.0; ATV A 115).
There is generally no need to take any special precautions for
draining condensate.
We advise using plastic (PP) piping for building the condensate
drainage.
0
DO NOT for any reason use pipes in copper or in any other
material not specifically used for this particular scope, as
the condensing action could cause rapid degradation.
i
(*)
minimum
distance
10 mm
(*) Fill the siphons with water.
Furthermore, should the vertical part of the flue exhaust duct
have to be prolonged by more than 4 metres the condensate
drain-trap will have to be placed at the foot of the piping. The
working height of the drain-trap must be at least 30 cm. The
drain-trap outlet must then be connected up to the sewerage
mains.
9
The condensate drain must be connected to the sewerage
mains in such way as to prevent it from being frozen under
any circumstances.
9
Always install a condensate drain in the exhaust flue duct at
no more than 1 m from the boiler
i ≥ 3°
(*)
minimum
distance
300 mm
i > 3%
Civil drain
Condensate collector
(at atmospheric pressure)

4.7 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 compo-
nents. 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 Chapter 5 in which different types of plant are shown.

4.8 Exhaust flue

The chimney should be as straight as possible, sealed and iso-
lated. Should not have occlusions or narrowing.
9
The overall potential of thermal groups Condexa Pro3 IN-EXT
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).
9
The Condexa Pro3 IN-EXT series generators must be con-
nected to a exhaust pipe system in flame retardant poly-
propylene (PP) or suitable materials according to UNI EN 677
Fig. 7 and associated standards.
0
DO NOT for any reason use piping not specifically designed
for this specific scope as the condensing action could cause
rapid degradation.
9
Where collectors are used to evacuate the smoke, the pres-
ence of non-return valves within each unit stops the prod-
ucts of combustion of the active units entering the boiler
room by means of the closed unit intake ducts.
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