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R2KA 34 /20 - RAD - ING - Inst.Manual - 2002.1_CSA
1. INSTALLATION
INST
ALLER
1.1.12. SYSTEM FILLING
WARNING
For system filling use only clean tap water.
WARNING
If the system is filled by adding ethylene
glycol-type chemical agents it is suggested to install
a system fender on the hydronic system in order to
separate the heating circuit from the domestic circuit.
Before powering up the boiler, fill the system as
follows:
1. Make sure the circulator is not blocked;
2. Slightly loosen the cap of the circulator air
eliminator (1-fig. 10) to release the air from
the system;
3. Slightly loosen the cap of the air eliminator
placed on the top of the condensing block
(fig. 12) to release the air form the top of the
system;
4. Open the feeding tap “R” (fig. 11);
5. Release all the air;
6. Use pressure gauge “M” (fig. 11) to make sure
that the system pressure reaches 1.2 bar (fig.
13);
7. After performing this operation, make sure
that the loading tap “R” (fig. 11) is properly
closed.
2
1
M
R
INSTALLATION
fig. 10
fig. 11
fig. 12
