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R2KA 34 /20 - RAD - ING - Inst.Manual - 2002.1_CSA
1. INSTALLATION
INST
ALLER
1.1.10. WATER CONNECTIONS
DANGER
Make sure that the tubes of the water and
heating unit are not used as grounding system for the
electrical unit. There are not suitable for such use.
WARNING
To prevent voiding the warranty and to
ensure the proper operation of the boiler, wash the unit
(if possible when hot) with suitable descaling solution to
remove the impurities coming from tubes and radiators.
WARNING
If the boiler is installed in a hydrostatic
position lower than those of the user devices (radiators,
fan coils, etc.), mount the shut-off valves on the domestic
water heating circuit to ease the performance of the
maintenance operations if necessary to only empty the
boiler.
WARNING
When connecting the equipment to water
supply, avoid excessive bending and recovery operations
from improper positioning that may damage the tubes
causing leaks, malfunction or premature wear.
WARNING
In order to avoid any vibrations and noises, do
not use tubes with small diameters or elbows with small
radius and significant cut-off of the passage sections.
DOMESTIC CIRCUIT
In order to prevent limestone build-up and damages
to the domestic water heat exchanger, the hardness
of the domestic supply water should not exceed 8.4°
dh (degrees hardness). However, please check the
characteristics of the water used and install suitable
treating devices.
The heat exchanger coil cleaning frequency depends
on the hardness of the supply water and on the
presence of solid residues or impurities inside
the water that are often present in case of recently
installed plants. Based on the characteristics of
the inlet water, you should install suitable water
treatment devices, for residues presence. Please
install an inline filter.
The pressure of the cold inlet water should be
between 7.2 psi (0.5 bar) and 150 psi (10.34 bar). In
case of greater pressure values, please install a
pressure reducer upstream from the boiler.Please
refer to local jurisdictions on the requirements for
cold inlet water pressure.
HEATING CIRCUIT
In order to avoid any scale or deposits on the primary
exchanger, the hardness of the heating circuit inlet
water should not exceed 14° dh (degrees hardness).
However, please check the characteristics of the
water used and install suitable treatment devices.
To protect the central heating system from damaging
corrosion, flakes or deposits it is important to clean
the hydronic system using cleaners such as Fernox F3
Cleaner. For long term protection against corrosion
and deposits, the use of inibitor (such as Fernox F1
inhibitor) is required after cleaning and flushing of
the hydronic system. It is important to monitor the
concentration of the inibitor during commisioning and
during servicing of unit.
WARNING
Failure to clean the central heating system
or add adequate inibitor invalidates the compliance
warranty.
Connect the boiler safety drains (heating circuit safety
valve) to a discharge funnel. The manufacturer is not
responsible for any floods due to safety valve opening
in case of unit excessive presure build up.
WARNING
In case the boiler is installed as part of a low
temperature circuit, please install a safety thermostat
on the heating flow, which can stop the boiler activity
in case of high heating flow temperature. The company
assumes no liability for damage caused to persons or for
failure to comply with these instructions.
INSTALLATION
