65
R1K 75 - RAD - ING - Man.Inst. - 1901.1_
SK.2
_con_PA_AHS
2 Svuotamento dell'impianto_R1K 100_SK.2_EN
2. MAINTENANCE
SUPPOR
T
CENTRE
2.2.16. SYSTEM EMPTYING
It is not recommended to empty the heating system
as the changes of water generate the increase of
limestone deposits inside the exchangers. In case
it is necessary to protect against freezing the
heating circuit by adding anti-freeze liquid to the
system water, these products must be approved by
the company.
The possible limestone descaling of the elements
of the boiler must be performed by means of
the substances approved by the company, in
compliance with what has been specified in the
safety data sheet of the used product, ventilating
the environment, wearing protective clothing,
avoiding mixing different products, protecting the
device and the surrounding objects.
Whenever you need to empty the system, proceed
as follows:
› turn off the main power supply switch;
› 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;
› rotate the RS draining tap of the boiler (fig. 1)
and, if installed, of the hydraulic compressor and
of the collectors of the system;
› 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;
› if it is necessary to empty only the boiler, close
the delivery/return sectioning taps of the heating
circuit and open only the draining tap placed on
the lower part of the boiler and inserted in the
pump collector.
RS
RS
fig. 1
