8
The fluid recommended in the installation is water and glucose antifreeze of 30%.
Note:
At reaction, and valve operation, during fluid cooling in an overheated boiler part of the new fluid is injected into
the boiler, but the part is also ejected from the boiler. It will be poured down the drain. If the antifreeze is in the
installation you must keep in mind that a certain percentage will go out and pour down the drain!
We recommend the thermal valve Caleffi type 544, 1/2" as shown in Figure 7a.
6.2.2 SLOPE PRESSURE REGULATOR 1/2" WITH MANOMETER (Fig. 7, Item 19 and Fig. 7b)
When installing the thermal valve it is required to mount the slope pressure regulator as shown in Fig. 7, Item
19. The pressure that is maintained by pressure regulator must be set at a higher pressure than the pressure
that is in the heating system. If you do not have a higher water pressure of at least 0.8 bar compared to the
pressure in the heating system thermal valve will not work or cannot inject cold water into the boiler that needs
to be cooled.
Pressure regulator should be set to 2.8 to 3 bars.
You should take into account the direction of placing the slope pressure regulator!
6.2.3 WATER FILTER OF THE BOILER INTAKE (Fig. 7, Item 20)
In front of the slope pressure regulator on water intake from water supply line it is necessary to install a filter
that will clean the water from solid objects, primarily of sand, which can damage the tap seal or seals of the
thermal valve and the slope pressure regulator.
This filter does not need to be resistant to high water temperatures due to cold water that flows through.
6.2.4 WATER FILTER OF THE BOILER OUTLET (Fig. 7, Item 21)
It is required to install the filter on the boiler outlet which will clean the hot - boiling water from dirt and solid
objects that can damage the tap seals, or seals of the thermal valve.
This filter must be resistant to water temperatures up to 150°C.
NOTES:
- After the completion of thermal valve activation, checking the pressure in the installation and filling the system
with cold water is mandatory.
- In cases where antifreeze is used, after filling the installation with water it is required to check percentage
content of antifreeze in a mixture of water and antifreeze!
- To avoid elimination of the antifreeze agent solution from the installation, it is best to have backup battery
supply of the pump with an inverter.
6.3 SAFETY VALVE (Fig. 7 and 8, Item 5 and Fig. 4, Item 6)
An R1/2" connection (Fig. 4, Item 6) is welded at the back of the boiler, under the cooktop frame, on which a
safety valve MUST be fitted. The safety valve should be 2.5 to 3 bars. You can fit it directly on the connection
or at a distance from the connection of at least 1 m, provided that there is no block valve between the boiler
and the safety valve.
In general, safety valve is not fitted in open circuits, but we advise you to fit it nonetheless, as another safety
precaution for the boiler and the system (in case of emergency).
NOTE:
If the safety valve is not fitted as described above, the warranty will not be valid.
6.4 THERMOMETER AND PRESSURE GAUGE (Fig. 1, Items 16 and 17 and Fig. 5)
Thermometer and pressure gauge are installed on the stove, on the additional lid (Fig. 1, Item 24) between the
firebox door and the ash pan door (Fig. 1, Items 16 and 17, and Fig. 5) and therefore it is not necessary to
install them.
Thermometer, Item 17, shows the temperature of water in the boiler (operating temperature) in
ºC.
Pressure gauge, Item 16, shows the pressure of water in the boiler or the system in bars.
Figure
5
Figure 6
