Italtherm CITY MAX 26 K, Инструкция по эксплуатации

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Green Heating Technology
19
System filling and pressuring
Once all system connections have been carried out, proceed with the filling of the heating system and of
the DHW storage. This operation should be made with care, respecting the following steps:
The operations to completely purge the air from the heating system and from the storage coil,
require the activation of the boiler, therefore the final purging must be performed, by qualified
technicians, during the first starting up.
DHW storage tank filling
1. Load the DHW expansion vessel (see "Boiler internal components" on page 48) to the aqueduct
pressure;
2. open one of the hot water taps in the DHW system;
3. gradually open the hand valve 5 installed on the boiler's cold water inlet connection;
4. when only water flows out of the tap, close it.
Heating system filling
1. Open the radiators venting devices;
2. Check that the plug of the automatic air vent, in-
corporated in the boiler circulator, is unscrewed:
if not, unscrew it and leave it unscrewed, even
afterwards, for normal operation;
3.
If it's required to fill the system with anti-freeze
solution, do this operation, then hermetically
close the connection or the valve used to put the
solution in, to allow the pressurization.
4. Gradually open the filling cock 1 ;
5. Check the correct functioning of automatic vent-
ing devices, eventually installed on the heating
system;
6. Close the radiators venting devices as soon as water flows out of them;
7. Make sure, by reading the pressure gauge 2 , that the pressure reaches the optimal value of 1.0 bar
(max 1.5 bar);
8. Close the filling cock 1 and bleed each radiator again;
9. Without activating the boiler, cold purge the storage coil, by using its manual venting valve (item 11
on page 29)
10. Repeat the venting and pressurization operations until the air is completely purged. The complete
purging needs the activation of the pump, so it's possible only during the first starting up.
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