General Precautions; Energy-Saving Tips - Baxi NUVOLA DUO-TEC GA 16 Instruction Manual For Users And Fitters

GENERAL PRECAUTIONS

This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure. It must be connec-
ted to a central heating system and to a domestic hot water supply system according to its performance and power output. Before
having the boiler installed by a qualified service engineer, make sure the following operations are performed:
• Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings on the
packaging and the rating plate on the appliance.
• Make sure that the flue terminal draft is appropriate, that the terminal is not obstructed and that no exhaust gases from other
appliances are expelled through the same flue duct, unless the latter has been specially designed to collect exhaust gas from
more than one appliance, in compliance with current laws and regulations.
• Make sure that, if the boiler is connected to existing flue ducts, these have been thoroughly cleaned as residual products of
combustion may detach from the walls during operation and obstruct the flow of fumes.
• To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit
1.1 If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser or an
equivalent treatment system, compliant with current regulations.
1.2 Thoroughly flush the system after installation of the appliance and before use.
1.3 The materials used for the DHW circuit comply with Directive 98/83/EC.
2. Heating circuit
2.1 New system: Before installing the boiler, the system must be cleaned and flushed to eliminate residual thread-cutting swarf,
solder and any solvents, using suitable off-the-shelf non-acid and non-alkaline products that do not damage metal, plastic and
rubber parts. To protect the system from scale, use inhibitors such as SENTINEL X100 and FERNOX protector for heating circuits.
Use these products in strict compliance with the manufacturers' instructions.
2.2 Existing system: Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable
proprietary products. Recommended cleaning products are: SENTINEL X300 or X400 and FERNOX regenerator for heating cir-
cuits. Use these products in strict compliance with the manufacturers' instructions. Remember that the presence of foreign bodies
in the heating system can adversely affect boiler operation (e.g. overheating and excessive noise of the heat exchanger).
Initial lighting of the boiler must be carried out by an authorised Service Engineer who must first ensure that:
• The rated data correspond to the supply (electricity, water and gas) data.
• That the installation complies with current regulations.
• The appliance is correctly connected to the power supply and earthed.
Failure to observe the above will render the warranty null and void. The names of the authorised Service Centres are indica-
ted in the attached sheet. Prior to commissioning, remove the protective plastic coating from the boiler. Do not use any tools
or abrasive detergents to do this as you may damage the painted surfaces.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of
danger.

ENERGY-SAVING TIPS

Adjustment in the heating mode
Adjust the boiler flow temperature depending on the kind of system. For systems with radiators, set a maximum heating water
flow temperature of approximately 60°C and increase this value if the required room temperature is not reached. For systems with
radiant floor panels, do not exceed the temperature indicated by the system designer. Use the External Sensor and/or Control
Panel to automatically adjust the flow temperature to atmospheric conditions or the indoor temperature. This ensures that no more
heat than that effectively necessary is produced. Adjust the room temperature without overheating the rooms. Every extra degree
centigrade means consuming approximately 6% more. Also room ambient temperature depending on how the rooms are used.
For example, the bedroom or the least used rooms can be heated to a lower temperature. Use the programmable timer and set the
night-time room temperature at approximately 5°C lower than that during the day. There is no appreciable saving to be achieved
by setting it any lower. Only in case of a prolonged absence, such as a holiday, should the temperature setpoint be lowered. Do
not cover radiators as this prevents the air from circulating correctly. Do not leave the windows partially open to ventilate the rooms
but open them completely for a short period.
Domestic hot water
Setting the domestic hot water at the required temperature without mixing it with cold water saves a lot of money. Additional hea-
ting wastes energy and creates additional scale.
BAXI
a leading European manufacturer of hi-tech boilers and heating systems, has developed
CSQ-certified quality management (ISO 9001), environmental (ISO 14001) and health and
safety (OHSAS 18001) systems. This means that BAXI S.p.A. includes among its objectives the
safeguarding of the environment, the reliability and quality of its products, and the health and
safety of its employees.
Through its organisation, the company is constantly committed to implementing and improving
these aspects in favour of customer satisfaction.
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