Flues, Chimneys And Chimney Caps; Water Treatment System Filling; System Filling; Filling The Condensate Drain Trap - Immergas Victrix Tera 28 1 Instruction Booklet And Warning

1.22 FLUES, CHIMNEYS AND CHIMNEY
CAPS.
The flues, chimneys and chimney caps for the
evacuation of combustion products must be in
compliance with applicable standards. Chimneys
and roof-installed exhaust terminals must com-
ply with the outlet height and with the distance
from technical volumes set forth by the technical
standards in force.
Positioning the wall flue exhaust terminals. The
wall flue exhaust terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum dis-
tances specified in current technical standards.
Combustion products exhaust of natural
draught or fan assisted appliances in open-top
closed environments. In spaces closed on all
sides with open tops (ventilation pits, court-
yards etc.), direct combustion product exhaust
is allowed for natural draught or fan assisted gas
appliances with a heat input range from 4 to 35
kW, provided the conditions as per the current
technical standards are respected.
1.23 WATER TREATMENT SYSTEM
FILLING.
As already mentioned in the previous para-
graphs, a treatment of the thermal and domestic
system water is required, in compliance with the
local standards in force.
The parameters that influence the duration and
proper operation of the heat exchanger are the
water's PH, hardness, conductivity, and oxygen,
together with the system's processing residues
(any welding residues), any oil present and cor-
rosion products that can, in turn, cause damage
to the heat exchanger.
In order to prevent this from happening, you are
recommended to:
- Before installation on new systems as well as
old ones, clean the system with clean water to
eliminate solid residues contained therein.
- Clean the system with a chemical treatment:
- Clean the new system with a suitable cleaning
device (for example Sentinel X300, Fernox
Cleaner F3 or Jenaqua 300) combined with
thorough washing.
- Clean the old system with a suitable cleaning
device (for example Sentinel X400 or X800,
Fernox Cleaner F3 or Jenaqua 400) combined
with thorough washing.
- Check the maximum hardness and quantity
of filling water referring to the graphics (Fig.
32). If the contents and hardness of the water
are below the indicated curve, no specific
treatment is required; otherwise, to limit the
content of calcium carbonate, you must provide
for water-filling treatment.
- For filling, you are not allowed to use water
softened with the use of ionic-exchange resins
or distilled water.
- Should you be required to provide for water
treatment, this should be carried out by
completely desalinating the filling water. As
opposed to the complete softening process,
desalinating the water completely not only
removes hardening agents (Ca, Mg), but also
eliminates all other minerals to reduce wa-
ter-filling conductivity up to 10 microsiemens/
cm. Given its low conductivity, desalinated
water does not only prevent the formation of
lime scale, but also serves as protection against
corrosion.
- Insert a suitable inhibitor / passivator (for
example Sentinel X100, Fernox Protector F1,
or Jenaqua 100); if required, also insert appro-
priate antifreeze (such as for example Sentinel
X500, Fernox Alphi 11 or Jenaqua 500).
- Check electrical conduction of the water, which
should be higher than 2000 µs/cm in the case
of treated water and lower than 600 µs/cm in
the case of non-treated water.
- To prevent corrosion, the water system's PH
should be between 7.5 and 9.5.
- Check the maximum content of chlorides,
which should be less than 250 mg/l.
N.B.: for quantities and methods of use of wa-
ter-treatment products, refer to the instructions
provided by their manufacturer.

1.24 SYSTEM FILLING.

Once the boiler is connected, proceed with
system filling via the filling cock (Part. 26 Fig.
35). Filling is performed at low speed to ensure
release of air bubbles in the water via the boiler
and central heating system vents.
The boiler has a built-in automatic venting valve on
the pump. Check if the cap is loose. Open the radiator
vent valves.
Close radiator vent valves when only water
escapes from them.
Close the filling valve when the boiler pressure
gauge indicates approx. 1.2 bar.
N.B.: during these operations, enable the au-
tomatic vent functions on the boiler (active on
first ignition).
Water hardness °F
20
1.25 FILLING THE CONDENSATE DRAIN
TRAP.
On first lighting of the boiler, flue gas may come
out the condensate drain; after a few minutes'
operation check that this no longer occurs. This
means that the drain trap is filled with conden-
sate to the correct level preventing the passage
of flue gas.
N.B.: the graph refers to the
entire life cycle of the system.
Therefore, also consider sched-
uled and unscheduled mainte-
nance, which involves emptying
and filling the said system.
32