Preparation For The Condensate Drain; Neutralising The Condensate; Water Quality Requirements - Riello Condexa PRO Series Installation, Technical And Maintenance Manual

INSTALLATION
2.10.1

Preparation for the condensate drain

The evacuation of the condensate produced by the appliance
Condexa PRO during its normal operationmust be carried out
through a siphoned condensate collector, placed under the
thermal module itself. This collector is installed as standard in
models Condexa PRO 35 P - Condexa PRO 50 P , while it is avail-
able as an accessory for models Condexa PRO 57 P ÷ Condexa
PRO 135.
The condensate coming out of the drainer must be collected for
dripping into a taped vessel connected to the sewer system, if
necessary by interposing a neutralizer (for more information see
paragraph "Neutralising the condensate"), according to the fol-
lowing procedure:
− Fit a drip tray near the condensate discharge outlet, add-
ing a condensate neutraliser if necessary
− Connect the drip collection receptacle to the local drain or
sewer system using a siphon.
The drip tray can be created by fitting a cup or simply a polypro-
pylene bend, suitable for collecting the condensate that comes
out of the appliance and any liquid leaking from the safety valve.
The connection to the local drain or sewer system must be ex-
ecuted using a siphon in order to prevent unpleasant odours
from being released back into the room from the sewer.
We advise using plastic (PP) piping for building the condensate
drainage.
0
Never use copper pipes under any circumstances, as the
condensate itself will cause them to rapidly deteriorate.
Condensate
basing
(accessory)
9
Execute the condensate drain outlet so as to prevent com-
bustion gases leaking into the environment or the drain or
sewage system by sizing the siphon (height H) as described
in Paragraph "Discharge of combustion products".
9
Always maintain a slope angle "s" of over 3° and ensure
that the diameter of any condensate drain pipe is greater
than that of the connection fitted at the drain outlet
9
Connect the condensate drain hose to a domestic water
drain in accordance with national and local legislation and
standards.
9
Fill the siphon with water before activating on the thermal
module in order not to release any combustion products
into the environment when the thermal module is first
switched on.
H
i >3%
residential discharge
Drip tray
9
The condensate drain must be suitably siphoned. Fill the
siphon with drain in order to prevent the release of com-
bustion products when the appliance is first switched on.
9
It is recommended that condensate from the thermal mod-
ule and from the flue should be channelled to the same
drain pipe.
9
The connection pipes used must be as short and as straight
as possible. Any curves or sharp bends can lead to hoses
becoming clogged and, therefore, can prevent proper con-
densate discharge
9
Size the condensate drain outlet so as to ensure the proper
drainage of waste liquids without leaks
9
The condensate drain must be connected to the drain and
sewage network in such a ways so that the condensate may
not freeze under any circumstances

2.11 Neutralising the condensate

The UNI 11528 Standard provides for mandatory neutralisation
of condensate for systems with total power of over 200 kW. For
systems with total power from 35 to 200 kW, neutralisation may
or may not be mandatory depending on the number of flats
(for residential applications) or the number of occupants (for
non-residential applications) served by the aforementioned
system.
2.11.1

Water quality requirements

It is ABSOLUTELY NECESSARY to treat the water system in order for
the heat generator to work properly and to guarantee its service
life, as well as that of all its components. This not only applies
to jobs carried out on existing installations but also on new in-
stallations.
Sludge, lime-scale and pollutants contained in the water can
cause permanent damage to the heat generator, also within a
short time and notwithstanding the quality standards of the
materials used.
Contact the Technical Assistance Service for any further informa-
tion on type and use of additives.
The heat transfer fluid (water) for the central heating circuit must
conform to the quality parameters given in the following table:
Parameters
General characteristic
PH value
Dissolved oxygen
Total iron (Fe)
Total copper (Cu)
Na2SO3
N2H4
PO4
CaCO3
Trisodium phosphate
Chlorine
Electrical conductivity
Pressure
Glycol
9
All data in the table refer to water contained in the system
after 8 weeks' operation.
26
Value Unit
Colourless, without
sediment
Min. 6.5; Max. 8 PH
< 0,05 mg/l
< 0,3 mg/l
< 0,1 mg/l
< 10 mg/l
< 3 mg/l
< 15 mg/l
Min. 50 ; Max.150 ppm
None ppm
< 100 ppm
microsiemens/
<200
cm
Min. 0.6; Max. 6 bar
Max. 40% (only
%
propylene glycol)