NEO FIRE – Technical Manual
46
16.4
Draining of the boiler condensate
16.4.1
Water condensing
The energy efficiency added thanks to the use of the latent heat of the condensate can be up to 11% in case of
natural gas, which is the relation between the High Calorific Value (HCV) and the Low Calorific Value (LCV).
The theoretical volume of the condensate can be:
- 1.63 kg / m3
- up to 0.14 kg / kWh
Condensate outlet shall not be modified or blocked
16.4.2
Condensate neutralization treatment
For natural gas, the condensed water has a pH value around 4
It is recommended to carry out a condensate neutralization treatment before throwing them to the general
drainage of the building, or similar.
Generally, you have to make the condensed products circulate mixed with a sort of powder, which can be
calcium carbonate, hydrolyte of magnesium (salt formed by calcium hydride, CaH2, and magnesium) or similar,
in order to neutralize them, which means to increase the value of its pH so that it will be between 6.5 and 9.
It is recommended to take periodical measurements of the water pH after the neutralization treatment: when
the value measured is lower than 6.5 it is recommended to replenish with the powder.
In any case, the neutralization treatment must be carried out in conformity with the local, autonomic and
national laws.
The neutralization system should be placed at a level of height lower than the boiler condensate drain pipe. If
this is not possible, consider the installation of a condensate pump.
16.4.3
Condensate drainage
- Some boiler models should be placed on a base with sufficient height to allow the installation of the
condensate drain pipe, of the siphon and of the connection to the condensate neutralization system.
- The evacuation of the condensate to the general drainage should be carried out in a visible way, through a
visible connection, open funnel or similar.
- Due to the characteristics of the condensed water, the material of the piping must be resistant to the action
of the acid water, for example: plastics (P.V.C).
- The evacuation pipe must have a minimum slope of 30 mm / metre.
- Drainage by means of an external piping is not recommended, due to the risks of condensation and
corrosion.
16.4.4
Boiler chimney
The chimney must be made with materials that are resistant to condensed water, which is acid.
The gaskets joining the components of the chimney must be watertight.
The chimney must comply with the national and European regulations.
Summary of Contents for NEO FIRE 120
Page 1: ...TECHNICAL MANUAL OF INSTALLATION USE AND MAINTENANCE 07 2020 ...
Page 7: ...NEO FIRE Technical Manual 7 NEO FIRE 360 900 ...
Page 9: ...NEO FIRE Technical Manual 9 NEO FIRE 80 NEO FIRE 120 160 ...
Page 10: ...NEO FIRE Technical Manual 10 NEO FIRE 200 280 NEO FIRE 360 720 ...
Page 34: ...NEO FIRE Technical Manual 34 11 1 Electric drawing NEO FIRE 80 720 ...
Page 35: ...NEO FIRE Technical Manual 35 11 2 Electric drawing NEO FIRE 810 900 ...
Page 37: ...NEO FIRE Technical Manual 37 Electric drawing 1 Boiler with 3 heating circuits ...
Page 41: ...NEO FIRE Technical Manual 41 System drawing 1 Boiler and Domestic Hot Water DHWS ...
Page 58: ...NEO FIRE Technical Manual 58 System drawing D H W and heating circuit 11 11 ...
Page 59: ...NEO FIRE Technical Manual 59 System drawing of an old installation heating circuit 11 ...
Page 70: ...NEO FIRE Technical Manual 70 18 4 Position of probes and sensors ...