Unical DUA plus, Installation And User Instruction Manual

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General information
While thanking you for buying an UNICAL product we invite you to carefully read the following forewarnings:
IMPORTANT
This INSTRUCTION MANUAL, which is an integral and indispensable part of the product, must be handed over to the user by
the plumber.
Read carefully the forewarnings contained in this manual because they supply important indications concerning the
safetywhen using and maintaining the boiler. Kept the manual in a safe place for any future reference.
The boiler must be installed by qualified personnel, in compliance with all applicable laws and standards, according to the
manufacturer’s instructions given in this manual.
Incorrect installation may cause injury to persons and/or animals and damage to property. The manufacturer shall not be held
liable for any such injury and/or damage.
After removal of the packaging, which has to be sent to specific waste management sites for recycling, check that the boiler is intact and
that it has not been damaged during transport and handling. Keep the packaging out of the reach of children as it may represent a choking
and suffocation hazard. Do not install equipment which is
patently damaged and/or faulty.
Before installing the boiler, check that the technical data supplied by Unical, correspond to requirements for its correct use in the system.
Before making any service on to the boiler switch off the power supply.
In the event of failure and/or faulty functioning, switch off the boiler. Do not attempt to make repairs: contact qualified technicians.
Original parts must be used for all repairs to the boiler.
Non-observance of the above requirement may jeopardize the safety of the boiler and expose people, animals and property to danger.
To grant the efficiency of the appliance and for its proper operation it is necessary to do a periodical service according to the
UNICAL's indications and local laws in force.
The manual must be handed over with the boiler should it be sold or transferred, in order that the new owner and/or installer can consult it.
Only original accessories must be used for all boilers supplied with optional kits (including electrical ones).
This boiler must be used for the purposes for which it has been designed. Any other use shall be considered incorrect and therefore
dangerous.
Damage and/or injury caused by incorrect installation or use and/or damage and/or injury due to non-observance of the manufacturer’s
instructions shall relieve
UNICAL from any and all contractual and extracontractual liability.
To guarantee efficiency and correct functioning of the equipment it is legally binding to service the boiler once a year according to the
schedule indicated in the relative section of this manual.
In the event of long periods of inactivity of the boiler, disconnect it from the power mains and close the gas tap (Warning! In this case the
boiler’s electronic anti-freeze function will not be operative).
Should there be a risk of freezing, add anti-freeze: it is not advisable to empty the system as this may result in damage; use specific anti-
freeze products suitable for multi-metal heating systems.
N.B.: IF YOU SMELL GAS:
- do not turn on or off electrical switches and do not turn on electrical appliances;
- do not ignite flames and do not smoke;
- close the main gas tap;
- open doors and windows;
- contact a Service Centre, qualified installer or the gas supply company.
Never use flames to detect gas leaks.
WARNING
This boiler has been built for installation in the country indicated on the technical data plate, which shows, in addition to the technical
features, also the gas type for which it is prepared to work. In case these indications do not correspond to your requirements, please
contact your nearest Unical supplier. Thanks for that.
"WATER TREATMENT IN C.H. SYSTEM FOR CIVIL USE"
NOTE FOR INSTALLER AND USER
1) The frequency of the cl eaning of the D.H.W. heat exchanger is related to the hardness of the feeding water.
2) With a water hardness higher than 14°f the use of antiscaling devices, whose choice will be made on the base of water characteristics,
is suggested.
3) To increase the resistance to the scaling, a D.H.W. t
emperature adjustment very close to that one of the actual use, is suggested.
4) The adoption of a modulating room thermostat reduces the scaling danger.
5) We advise you to verify the state of cleaness of the D.H.W. heat exchanger at the end of the first year and subsequently every two
years.
PED Declaration
The appliance
DUA plus CTN 24 T - DUA plus CTN 24 E - DUA plus CTFS 24 T -
DUA plus CTFS 24 E - DUA plus RTN 24 - DUA plus RTFS 24
is not under the scope of the PED Directive 97/23/CE, because it belongs to a category lower than the 1st, on the base of the comparation
of their features with the limits shown on the table 4 of the directive. Furthermore the appliance is already covered by the Directives 90/396/
CE (GAD - Gas Appliances Directive) and 73/23/CEE (LVD - Low Tension Directive)