16
R2KA 28 /20 - RAD - ING - Manuale - 1806.1_SK.2
1 R
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dell
'impianto
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MI
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H
4
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2K
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EN
1. INSTALLATION
INST
ALLER
1.1.11. SYSTEM FILLING
WARNING
For system filling use only clean tap water.
WARNING
If the system is filled by adding ethylene
glycol-type chemical agents you have to install on
the loading system a hydraulic trip unit in order to
separate the heating circuit from the domestic circuit.
Before powering up the boiler, fill the system as
follows:
1. slightly loosen the cap of the circulator jolly
valve (1-fig. 1) to release the air from the
system;
2. slightly loosen the cap of the jolly valve placed
on the top of the condensing block (fig. 3) to
release the air form the top of the system;
3. open the feeding tap “R” (fig. 2);
4. release all the air;
5. use pressure gauge “M” (fig. 2) to make sure
that the system pressure reaches 1.2 bar (fig.
4);
6. after performing this operation, make sure
that the loading tap “R” (fig. 2) is properly
closed.
1
M
R
fig. 1
fig. 2
fig. 3
