18
Installation instructions
FLOOR HEATING
PLANT
150
TO CONDENSATE
DRAIN
150
25
SOCKET (H min 100 mm)
*
**
FILLING PLUG INITIAL
OF THE SIPHON
SMOKE CHAMBER
The upper generatrix of the exhaust pipe must
not be at a higher level the bottom of the
smoke chamber.
CONDENSATION UPON COMMISSIONING
While the boiler is reaching the operating temperature, a good
amount of condensation can be formed due to the low
temperature of the flue gas.
In these conditions, it could be useful to have the condensation
drained into the sewer. For this purpose, the smoke chamber
is equipped with an attachment which the exhaust pipes will
be connected to according to the following notes
When the operating temperature has been reached - see notes
in chap. 3.28 “COMMISSIONING” - it is important to check
whether more condensation has been formed.
If not, after having verified the actual fuel flow rates, the operating
temperature should be increased.
The condensation drainage in the sewer must be:
- implemented as to prevent releasing gaseous combustion
products into the environment or sewer (siphoning);
- dimensioned and implemented to allow the correct
outflow of liquid waste preventing any leakage;
- installed in such a way to prevent liquid from freezing
in the intended operating conditions;
- mixed for example with household wastewater (washer,
dishwasher drainage, etc.) for the most part with basic
pH in order to form a buffer solution to then be introduced
in the sewer system.
Condensation must not stagnate in the combustion product
drainage system (for this reason the evacuation duct must slope
at least 30 mm/m towards the drain) except for a liquid seal,
present in the drainage siphon for the evacuation of combustion
products (which must be filled after assembly and must remain
at least 25 mm high with the boiler running - see fig. 17).
Do not discharge condensation through gutter drainpipes due to
the risk of turning into ice and the deterioration of the materials
usually used to make the drainpipes (consult local hygiene
regulations).
The drain fitting must be visible.
Due to the acidity level of the condensation (pH from 3 to 5)
only suitable plastic materials must be used for the drain piping
(special optional kits with neutralizer salts for acid condensation
are available).
* Minimum safety siphon set by the standard
** Minimum head with boiler running at maximum
power.
If you do not want to or cannot create a plinth, the boiler
can be mounted at ground level and a sump at least 100
mm deep can be made to house the siphon.
fig. 17
3.9 - DRAINING CONDENSATION
3.8 - CONNECTING FLUE
EXHAUST PIPE
To connect the flue gas exhaust pipe, local and national
standards must be respected.
The XC-K boiler can be attached to the chimney in different
ways; straight pipes or elbows can be used to exit from the
rear, on the left, on the right, or else vertically to enter into the
flue at a higher level.
It is recommended to insulate the pipe connecting to the chimney
to reduce heat loss and noise.
Along the section connecting the boiler to the flue there
must be suitable points for measuring flue gas temperature
and analysing combustion products.
Use only exhaust pipes suitable for the type of fuel used.
The supplier will have no contractual or extra-
contractual liability for damage caused due to
incorrect installation and use and anyway failure
to comply with the instructions provided by
the manufacturer.
When performing replacement installations, ALWAYS
replace the flue gas exhaust accessory as well.
The flue must comply with standards in force.
