- 41 -
INSTALLATION
5 - HYDRAULIC CONNECTION
When the boiler is assembled on an old
installation, make sure that the installa-
tion is rinsed with fresh water, so as to
clear any sediment stagnating in areas
where the flow is slow.
-
To prevent circulation noises in an ins-
tallation featuring temperature controls,
the following is recommended:
- Do not fit all the radiators with tempe-
rature controls,
- Fit a differential valve,
- Use an automatic speed variation
pump.
In accordance with the decree of the Mi-
nistry of Health for the protection of the
drinking water supply, the filling system
must be fitted with a disconnecter of type
CB (non-controllable pressure zone).
Never position the isolation valve
between the safety control and the
hot water tank
.
- Bleed:
The bleed of the circulating pump features a flexi-
ble tube that can be connected to the outlet (con-
densate extraction funnel).
- Safety control (for hot water production mo-
dels):
• The safety control must be installed at a
low point (0.25 m from the floor) in order to
enable the extraction of the domestic hot water
tank by siphoning. Otherwise, use a weld with
a low point drain tap.
• It is normal for the d.h.w. safety control to
leak a little water during the pre-heating of the
hot water tank. If the cold water pressure ex-
ceeds 4 bars, the installation of a pressure-re-
ducing valve on the cold water inlet is advised.
- Isolating valve:
It is recommended to place isolation valves on
the installation’s flow-returns in order to allow
possible servicing on the boiler without having to
drain the installation.
- Safety valve:
This must be connected to the used water drain
via a siphon funnel.
- Condensate outlet:
The condensate outlet must be connected to an
accessible siphon.
- Expansion vessel:
If the installation capacity is over 100 litres, an ex-
tra expansion vessel to the boiler expansion ves-
sel will be added.
The correct operation of the boiler requires an
installation pressure of at least 1 bar.
If the installation is a renovation and uses an
open tank, this must be removed and replaced
with a closed tank (the boiler can be equipped
with one originally) to seal the circuit.
The vessel should be able to support an expan-
sion of 6% of the total water capacity of the hea-
ting circuits. But it is important to note, in order to
guarantee this expansion, that the useful capacity
of a vessel does not equal its actual capacity.
Example:
• Installation: 100 litres
• Domestic hot water tank: 5 litres
• Boiler: 2,5 litres
• Total water capacity: 107,5 litres
Conditions
: Using a vessel pre-loaded to 1 bar
(under floor boiler = ground floor
h 1 floor), heating safety
valve calibrated at 3 bars, installa-
tion filled cold at 1 bar.
• Vessel efficiency calculation (R):
+ 1) = the transformation of relative pressures into
abolute pressures
5.1 -
R
ecommendations
5.2 - Accessories to connect, install or
adjust
!
R
Safety Pressure - Filling pressure
(
)
Safety Pressure
------------------------------------------------------------------------------------
=
R
3 1
+
(
)
1 1
+
(
)
–
3 1
+
(
)
----------------------------------------
0 5
,
=
=
Содержание THI 5-25c
Страница 62: ... 77 NOMENCLATURE THI 5 25 C ...
Страница 65: ... 98 NOMENCLATURE CONTROL BOX ...
