Cordivari PUFFER VC VT Instrucciones De Uso página 9

General information - COMBI
This document is intended for the installer and the fi nal user. It
must therefore be handed over to the fi nal user or to the person
in charge of managing the system after the system has been
installed and started.
The heat-storage cylinders COMBI 1, 2, 3 XC/WC VT
manufactured by Cordivari S.r.l., are designed for use in those
heating system with simultaneous production of heating and
domestic hot water, with one or more heat sources typically
working on discontinuous mode.
In fact, thanks to their ability to store heat they are used in heating
systems operating on solid fuel boilers, heat pumps and solar
thermal systems.
The tank-in-tank heat-storage cylinders Combi always consist of
two cylinders of which one, the main cylinder (buffer) it is used
to store heating water (primary water), and the second one, the
inner tank, it is used to store the domestic hot water.
Combi 2 and Combi 3 are also provided respectively with 1 and 2
helical coil/s, allowing the use of the energy produced by a solar
thermal system and in general to separate hydraulically more
energy sources
The main cylinder of the Combi (the buffer, suitable to store
heating water), connected to a traditional solid fuel boiler,
guarantees the following advantages:
Allows the generator to operate smoothly, without interruptions
due to insuffi cient demand for energy from the heating system: in
these conditions, rather than stopping the combustion or overheat
the rooms, the generator can be operated continuously storing
energy in the cylinder. This energy will become available later
when the progressive exhaustion of the fuel will reduce the power
supplied from the boiler. The functioning without any interruptions
reduces smoke emissions and the fouling of the chimney, it
protects the boiler from harmful formation of condensed tar, and
increases the overall performance of the system.
• It is a "thermal fl ywheel" for the heating system and greatly
increases operator comfort, making it very similar to that of
automatic gas / diesel. In fact, the energy contained in the form
of hot water is automatically transferred to the heating system
when it is need it. This ensures even a few hours of heating when
the boiler is off, for example in the early hours of the morning.
Therefore the buffer volume of the Combi can be used only to
store the so-called technical water (the heating water of a closed
heating system).
The secondary volume (the one of the inner tank) is instead
thought to contain domestic hot water that warms up for the fact
that the secondary volume is "immersed" in the main volume
Any use of the product other than the indicated one in this
document raises the manufacturer from any sort of liability and
will avoid warranty of any kind.
2. Identifi cation of the category (Directive 97/23/EC)
According to Directive 97/23/EC the cylinders object of this
document are under the provisions stated in 'Article 3.3 of the
Directive itself. Therefore do not require CE marking. Cordivari
Ltd. guarantees, as established by the Directive, a sound
engineering practice (assured by the Quality System ISO 9001)
which ensures the safe operation and the identifi cation of the
manufacturer
3. Installation and Maintenance
• The handling of equipment whose weight exceeds 30 kg
requires the use of suitable means of lifting and carrying. To this
end, the cylinders must be handled only when empty.
BS_100_Rev_1
• The pallet that eventually comes with the device should be
removed before installation.
• If the insulation comes not mounted to the cylinders, please
note that it must be mounted before connecting the pipes.
Cordivari storage cylinders must always be installed so that they
are sheltered from atmospheric conditions, on an adequate and
solid base, verifying, before making the connections, that there is
enough space for the extraction of the devices directly connected
to it and for the usual maintenance operations.
• Always provide an adequate expansion systems, calculated
taking into account the total volume of the heating system,
including into that both for the volume of the buffer (containing
heating water) and the one of the DHW inner tank, in compliance
with rules and laws in force at the installation site, considering
also the type and power of the generator/s.
•On the domestic hot water circuit, even when laws and local
rules and regulations state that the expansion system can only
consist of appropriately sized safety valve is recommended to
install an expansion tank, closed non-toxic membrane type, to
avoid continuous opening of the safety valve .
•Where required, the connection of domestic cold water inlet to
the domestic water supply must be made by a group of hydraulic
safety conforms to EN 1487:2002, including at least one shut-off
valve, a check valve, a check valve control device, a safety valve,
a hydraulic load breaking device and all the other accessories
necessary for safe operation of the cylinders themselves.
• Ensure that the technical room, where the cylinder will be
located, have opening of suffi cient size to permit the free passage
out of the cylinder without having the need to operate demolitions
of any kind.
• Ensure that the technical room is equipped with a drain
(discharge) appropriate to the cylinder volume and any other
equipment. The warranty does not cover any costs arising from
defaults at this point.
• The installation and operation of the item covered by these
instructions must always respect the national and local rules
and regulations of the installation site in particular in relation to
prescribed safety and control accessories
•The formation of ice inside the cylinder can cause serious
damages and destroy the unit. Therefore where there is a
danger of below-zero temperatures, the heat-storage unit and
the heating system must be protected.
• Since the temperature of the domestic hot water contained
in the inner tank cannot be limited, ie it tends to raise to the
temperature of the primary circuit, to avoid the danger of burnings,
it is strongly recommended to install a thermostatic mixing valve
on the domestic hot water outlet.
• In general, heating plants producing domestic hot water, are
always subject to water treatment aiming to reduce damages
from lime scale.
In Combi cylinders these treatment becomes even more
important and necessary because of the impossibility to control
the temperature of the accumulated sanitary water. .
• In order to avoid the effects of any stray galvanic currents it is
always necessary to provide a PROPER GROUNDING of the
plants.
4. Connections
The cylinder reports on its label the generic use of its connections.
Therefore it is up to the heating system designer/installer
to evaluate, in respect of the laws and regulation in force at the
installation place, the best possible plant scheme, in compliance
with the limits (pressure and temperature), declared by the
manufacturer.
GB
CORDIVARI - 7