Depending on the type of heating system, a condensing boiler makes it possible to recover up to 10-11% more than a conventional boiler, but also with respect to the lower calorific value of methane, which is also known as natural gas.
Bleed the air from the radiators and Restore system pressure.
Restore the correct pressure value by acting on the boiler filling valve (for optimum operation, the pressure value should be within 0.8and 1 bar).When the minimum pressure value is reached (0.6 bar), boiler operation is resumed.
Burner blocking device triggered due to:
To decommission the system, disconnect the boiler from the power supply by acting on the main Switch. However, In the event of complete decommissioning, the heating and hot water production modes as well as the antifreeze protection are completely disabled. If idle for long periods, close the gas shut-off valve and cold weathercock, if present.
To activate the antifreeze function, position the two knobs as shown in the figure.
If you have encountered a problem with your heating system we recommend you consult the use and maintenance manuals. The problems might be caused on the user's side, and are easy to solve thanks to the use and maintenance manual, or they might be caused on the installer's side, in which case the service call will be more technical. As a general rule, we advise against attempting to make complex repairs on your own photovoltaic system unless you are authorised and qualified to do so. The guarantee certificate contains all the terms and conditions which apply. Normally both are enclosed with the product. We recommend you keep them in a safe place.
If you have encountered a problem with your solar heating system, first of all we recommend you consult the use and maintenance manuals. Usually, when a problem arises with the solar heating system, the causes may depend either on the user or on the installer.
We always advise against attempting to make complex repairs on your own solar heating system unless you are authorised and qualified to do so. The guarantee certificate specifies all solar heating system failures which are covered by the guarantee. Normally both are enclosed with the product. We recommend you keep them in a safe place.
If the boiler does not start when you turn on a hot water tap, make sure the flow rate at the water drawing point is sufficient. If the flow rate is sufficient, then check that the pressure on the boiler pressure gauge is at least 1 bar.
Should these two precautions not be enough for the boiler to start, then we recommend you contact the Unical Service Centre dedicated to heating systems.
To reduce costs to heat rooms if you have an independent heating system, first of all it would be advisable to have quite a recent boiler.
Indeed, technical progress is also made on durable goods, such as boilers: a sector which has witnessed surprising developments in recent years.
Unical has continuously innovated the products included in its heating catalogue, registering a large number of high technology patents in the H.V.A.C. industry.
For instance, it has introduced the widespread application of modulating timed thermostats.
Unical research in the heating systems sector has developed a series of HEAT
EXCHANGERS made of a special magnesium and silicon aluminium alloy. These heat exchangers ensure superior boiler efficiency and are covered by a 5-year guarantee.
In addition, the boilers designed and built by Unical are also environmentally-friendly: indeed, the gas burners use modulating premix systems with ultra-low CO2 emissions.
The main difference between a condensing boiler and one that does not use the condensing principle or a conventional boiler lies in the type of combustion. Indeed, the combustion of natural gas or methaneproduces heat, and since the CH4 methane molecule contains hydrogen H, the same combines with the oxygen to produce water which, considering its high temperature, is in the steam state. The combustion of Carbon C produces carbon dioxide CO2.
In condensing boilers, a special heat exchanger also acts as a condenser. Indeed, the heat exchanger is capable of cooling the fumes which are saturated with steam and which condense into water in the liquid state, using the water from the heating system at low temperature (approx. 50°) circulating through it. The fumes are expelled through purpose-designed disposal pipes which are normally connected to the heating system drain outlets.
The heat which the fumes transfer to the boiler heat exchanger in turn heats the water in the heating system which therefore benefits from this value which is normally lost. This operating mode reduces NOx and CO emissions (Nitrogen oxide and carbon monoxide) thanks to the use of particularly sophisticated combustion technologies.
Today it is possible, if not compulsory in some regions, to account for the heat used individually both for heating as well as for the production of Domestic Hot Water (DHW). For further information about accounting for the consumption of your heating system, we recommend you contact the administrator of your building.
Unical offers a complete range of Area satellites to account for the actual consumption of heating systems. One of the most popular heat meter systems is SATAL, and it is capable of solving all problems relating to the different types of systems.
A boiler is defined as being open-vented or natural draught when the appliance is connected to a chimney or a flue pipe or to a device for the discharge of combustion products outside the room in which the appliance has been installed.
These boiler models are also defined as Type B boilers.
The operating principle of an open-vented or natural draught boiler is very simple: the boiler draws combustion air from the room in which it has been installed and discharges the result of its combustion outside the same room (UNI 10642: 2005 p3.2).
There are certain installation restrictions for this type of boiler. These restrictions should be checked before installing this type of boiler.
All of our products are Eurovent & CE certified. Given that to place and trade a product on practically any market, you need to pass and acquire all Type certifications, such as EC, Unical type-approves and certifies all its products by the strictest international bodies.
Unical places particular focus on this; nevertheless, in many cases it has anticipated compulsory certification by type-approving its products in advance by choice. With a keen eye on safety, Unical is at the cutting-edge of the industry, dedicating more than 10% of its workforce to Research and Development (R&D).
To save in summer, if you have an independent heating system, if the heating programme does not necessarily have to remain active, such as in the mountains, select the "Summer" operation on the boiler panel and not just on the room timed thermostat.
Many Unical condensing boilers feature an optional function (RI.RA.) which, to enhance savings further in the management of your heating system, considering that the water originating from the waterworks in summer is warmer, makes it possible to disable special pre-heating circuits.
In appliances fitted with Regolafacile, this adjustment is carried out directly by the same.
In addition, in summer the number of daily showers increases with a predominantly cooling effect, so it is advisable to lower the temperature of the hot water outlet from the usual 45 degrees in winter to 38-39°. It will not be necessary to mix the hot water with cold water, making for true savings.
Integration with renewable energy sources: state programs are available, offering incentives/tax relief for installations to incorporate existing systems with solar systems, using Biomass or other renewable source; Unical offers an entire range of specific solutions, from a simple domestic system to heating of Swimming pools, etc.
For centralized heating systems, check the Domestic Hot Water (D.H.W.) production system, paying special attention to anti-Legionnaire's disease programmes; all our electronic temperature controllers are fitted with this programme.
To obtain definite savings on your water and heating bills, we recommend you contact your trusted Certified Operator. Without a doubt, after performing a survey and checking your annual gas consumption bills, a skilled and qualified technician will be able to recommend the best boiler for your particular requirements.
When you decide to purchase a new boiler, it is advisable to keep in mind that you are purchasing a durable asset. This means that you are making a proper investment which should pay for itself over time