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R2KA 34 /20 - RAD - ING - Inst.Manual - 2002.1_CSA
2. MAINTENANCE
SUPPOR
T CENTER
2.2.15. SYSTEM EMPTYING
HEATING SYSTEM EMPTYING
Whenever you need to empty the system, proceed
as follows:
› switch the boiler to “WINTER” mode and activate it;
› turn off the main power supply switch or unplug
the appliance;
› wait for the boiler to cool down;
› connect a flexible tube to the system emptying
outlet and connect the other end of the tube to a
suitable discharge;
› turn the discharge tap of the system ‘RS’ (fig.
38);
› open the relief valves of the radiators starting
from the one at the top and continuing
downwards;
› after draining out all water, close the relief
valves of the radiators and the emptying tap.
EMPTYING THE DOMESTIC SYSTEM
If there is freezing risk, you have to empty the
domestic system as follows:
› close the main supply tap of the water supply
network;
› Joint the water draining pipe and open the
cylinder draining tap ‘RB’ (fig. 38)
› open all cold and hot water taps;
› after completing all operations, close the
cylinder draining tap ‘RB’ (fig. 38) and all
previously opened water taps.
RB
RS
MAINTENANCE
fig. 38
