41
GRUPPO DI
CARICAMENTO
Instructions for the installer
3.22 SYSTEM FILLING AND EMPTYING
Attention!
Do not mix the heating water with antifreeze or anti-
corrosion substances at incorrect concentrations!
This may damage the gaskets and cause noise to
develop during operation.
Immergas will not be held liable in case of damage
caused to people, animals or property due to failure
to observe the above.
Once all of the connections for the system have been set up, it is possible
to fill the circuit.
To fill the system it is possible to set up a loading valve on the system's
return pipe.
It can also be filled through the drain valve installed on the boiler
return manifold.
The boiler is equipped with an emptying valve, positioned as indicated
in the figure of parag. 2.2. This valve must
never
be used to empty the
system, since all of the dirt contained in the system may accumulate
in the boiler, jeopardising smooth operation. Accordingly, the system
must be equipped with its own emptying valve, of a suitable size for
the flow rate of the system.
3.23 BOILER FROST PROTECTION
If the flow temperature (measured at the global flow NTC) should fall
below 7°C the system pump starts operating.
If the temperature drops any further (under 3°C), all modules are
commissioned at the minimum power until the return temperature does
not reach 10°C. This device protects the boiler only. In order to protect
the system as well, it is necessary to add antifreeze liquid.
NB: The antifreeze liquid must be compatible with materials present
in the entire system and tolerable for aluminium alloys.
EXAMPLE OF SYSTEM LOADING UNIT
LOADING
UNIT
