IDRO PRINCE
3
12-16-23-23 H
2
O - IDRO PRINCE 30-30 H
2
O - AQUOS
3
16-23-23 H
2
O - IDRON 16-22 AIRTIGHT - MIRA 16-22 - TESIS 16-23 AIRTIGHT - HIDROFIRE 22.8
39
7.9
WASHING THE SYSTEM
The connections must be easy to disconnect via pipe unions with swivel fittings.
Install suitable gate valves on the heating system pipes. A safety valve must be installed on the system.
To protect the heating system from harmful corrosion, build-ups or deposits, it is extremely important before installing the ap-
pliance to wash the system in compliance with the UNI 8065 standard (water treatment in heating systems for domestic use),
using appropriate products.
7.10 FILLING THE SYSTEM
To fill the system, the stove may be equipped with a terminal (optional) with a non-return valve (D) to manually fill the heating
system (if there is no terminal, use the filling valve on the main boiler). During this operation, the automatic bleed valve under the
top ensures that any air in the system is expelled.
To allow the valve to bleed, we recommend loosening the grey cap by a turn and leaving the red cap tight (see figure). The filling
pressure when the system is
COLD
must be
1 bar
. During operation, should system pressure drop (due to the gas dissolved in the
water evaporating) below the above indicated minimum value, the user must bring it back to the initial value, using the filling valve.
For proper stove operation when it is
HOT
, pressure in the boiler must be
1.5 bar
.
To monitor system pressure, the terminal (optional) is equipped with a pressure gauge (M).
When filling is complete, always shut off the valve.
It is normal for there to be noises and gurgling until all the air in the system has been expelled.
Fig. 45 - Terminal with filling valve (D) and
pressure gauge (M)
Fig. 46 - Manual bleed valve (located under the
top) (Idro Prince
3
16-23-23 H2O, Aquos
3
16-23-23
H2O, Idron 16-22 Airtight, Hidrofire 22.8)
Fig. 47 - Manual bleed valve (located under the
top) (Idro Prince
3
30-30 H2O)
7.11 WATER CHARACTERISTICS
The characteristics of the water used to fill the system are very important to prevent the build-up of mineral salts and the forma-
tion of incrustations along the pipes, in the boiler and in the heat exchangers.
Therefore, please ASK YOUR PLUMBER FOR HIS ADVICE CONCERNING:
Hardness of water circulating in the system, to prevent problems of incrustation and limescale, especially in
the domestic water heat exchanger. (> 25° French).
Installation of a water softener (if water hardness exceeds 25° French).
Filling the system with treated water (demineralised).
Possibly providing an anti-condensation circuit.
Installation of hydraulic shock absorbers to prevent water hammering along the fittings and pipes.
If you have very extensive systems (with a large amount of water) or which require frequent refilling, the installation of water
softening systems.
It should be remembered that incrustations drastically reduce performance due to their extremely low thermal
conductivity.