Radiant RKA 25, Инструкция по эксплуатации

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INSTALLATION INSTRUCTIONS
CONDENSING BOILOES WITH STORAGE - TG05A095.A0306
14
HR
HWO
CWI
G
HF
HR HWO G CWI HF
75.5 102 70 80 78 84.5
3.4 Water connections
In order to safeguard the heat
exchanger and circulation pump, it is
recommended that the system is hot-
flushed to remove any impurities
(especially oil and grease) from the
pipes and radiators.
Please ensure that all discharge and
safety pipes are connected and
terminated in line with page 17 of this
manual
Make sure that the domestic water and
central heating pipes are not used to
earth the electrical system. The pipes
are totally unsuitable for this purpose.
Isolating Valves must be installed on
the heating and D.H.W circuits. This will
facilitate all maintenance and service
operations where the boiler needs to be
drained.
■ To prevent vibration and noise coming from
the system, do not use pipes of reduced
diameter, short radius elbows or severe
reductions in the cross sections of the water
passages.
■ The increase in temperature of the hot water
storage units causes a consequent increase
in volume of the water contained in them. In
order to compensate for this increase in
volume, the appliance is fitted with an
expansion vessel specifically for the
domestic hot water system.
In order to guarantee the reliability of the
boiler and prevent permanent damage in
areas with high water inlet pressure too, a
3.5 bar pressure reducing valve should be
fitted.
■ In order to prevent scaling and eventual
damage to the D.H.W heat exchanger, the
mains water supply must not have a
hardness rating of more than 25 °F. It is
nevertheless advisable to check the
properties of the water supply and install the
appropriate treatment devices where
necessary
.
The cold water supply pressure at the inlet to the boiler should be between 0.5 and 3.5bar
The frequency of the heat exchanger coil cleaning depends on the hardness of the mains water supply and the
presence of residual solids or impurities, which are often present in the case of a new installation. If the
characteristics of the mains water supply are such that require it to be treated, then the appropriate treatment
devices must be installed, while in the case of residues, an in-line filter should be sufficient.
Fig. 2
Fig. 1