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SFK 56 - RAD - ING - Inst.Manual - 2007.1_CSA
1. INSTALLATION
INST
ALLER
1.1.9. WATER CONNECTION
DANGER
Make sure that the water tubes are not
used as grounding system for the electrical plant.
There are not suitable for such use.
WARNING
To prevent voiding the warranty and
to ensure the proper operation of the water
heaters, please wash the unit (if possible when
hot) with suitable descaling solution to remove the
impurities coming from tubes.
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 15 °dH. However, please check the
characteristics of the water used and install
suitable treating devices.
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 water
heaters.
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 recently
installed units. Based on the characteristics of
the inlet water, you should install suitable water
treatment devices, for residues presence please
install an inline filter.
HEATING CIRCUIT
WARNING
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
If a relief valve discharges periodically, this
may be due to thermal expansion in a closed water
supply system. Contact the water supplier or local
plumbing inspector on how to correct this situation. Do
not plug the relief valve.
WARNING
In case the water heater is installed as part
of a low temperature circuit, please install a safety
thermostat on the heating flow, which can stop the water
heater 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.
This water heater is suitable for water (potable)
heating and space. Please note the following:
Ú)
The
piping and components connected to the water heater
for the space heating application shall be suitable
for use with potable water;
Û)
Toxic chemicals, such
as used for boiler treatment, shall not be introduced
into the potable water used for space heating;
Ü)
A water heater that will be used to supply potable
water shall not be connected to any heating system
or component(s) previously used with a non-potable
water eating appliance;
Ý)
When the system requires
water for space heating at temperatures higher than
required for other uses, a means such as a mixing
valve shall be installed to temper the water for those
uses in order to reduce scald hazard potential. Please
see the typical piping diagram in the manual; and
Þ)
Water heaters for combination water/space heating
cannot be used in space heating applications only.
INSTALLATION
