Metal-Fach SMART EKO-CARBON Series, Эксплуатационная и техническая документация, Страница: 21 / 38

20
Question Answer Explanation
How long can the boiler
operate on full tank? There is no simple answer. It can be assumed that the boiler
can operate for 3-4 days. The continuous burn time depends on:

fuel calorific value, heating insulation of the building

kind of installation i.e. floor heating, radiators, boiler
 boiler exchanger cleanliness, amount of ash in the ash tray

outside temperature, inside temperature, combustion quality
What is the lowest
temperature of the boiler?
The higher the temperature the better but the lowest
temperature should not fall below 60
o C.
The boiler should be adjusted in the way so that when the boiler temperature is 60oC, the fumes
temperature is 140
o C. It ensures the best efficiency of the boiler. At such temperatures, the boiler will not
„sweat” and get wet as there is no fumes gas condensation
What is the minimum return
temperature? The recommended return temperature is 10oC lower than
the feeding temperature. In practice, without any mixing valves or other mixing devices it is impossible. It is recommended to install a
four-way valve to make the boiler operate on short circulation at high temperature and the installation on
any set temperature. The protection of the boiler is still in place and equals the boiler feeding temperature.
How is the boiler protected
against freezing? The boiler is protected against freezing with the controller
software. At the temperature below 8 o C, the controller opens up the mixing valve and turns on the central heating
pump in order to prevent the water in the installation from freezing. Additionally, all the pipes that are
exposed to heat loss should be extra insulated. Check if all the windows in the vicinity of the piping are
complete and shut and there are no holes in the walls etc.
During the initial start-ups the
boiler „sweats”. It is due to condensation. Heat the boiler above 80 o C and keep this temperature for at least 6 hours. If necessary, repeat.
Why is the fuel combustion so
rapid? The chimney diameter is too big.
Air flow is too high.
Controller set is incorrect. Close the throttle on the flue.
Check the sealant on the door.
Regulate the airflow.
Regulate the controller or call the helpline.
Why is there grime in the
boiler? There are few conditions in which grime collects in the boiler
e.g. wet fuel, bad combustion conditions, oversized boiler,
low boiler temperature. In the first case, the wet fuel produces low fumes temperature causing fumes condensation. In such case,
not only does the boiler get dirty but the chimney as well.
In the second case, it is usually caused by insufficient amount of air in the combustion chamber. It is
enough to let in some more air and the flame with gases will burn completely.
In the case of an oversized boiler, the temperature is reached very quickly making the boiler idle and the
fumes gases burn out causing grime collection. The worst scenario is when the temperature is too low. If
the boiler is not connected properly, it becomes a thermostat, which means that if you want ot lower the
temperature in your house, you need to lower the boiler temperature. It is recommended to install mixing
valves.
What to do when the water in
the boiler boils ? Do not panic. Nothing serious usually happens. The reason
for that might be lack of heat reception, open ash tray door,
feeding easily burnt materials e.g. paper. In such case, when the temperature exceeds 90oC, the controller activates all the pumps( even the ones
that are switched off) and opens up the mixing valve in order to cool down the boiler. If the door is open
please close it.
It is essential not to let cold water into the installation as it may cause an explosion.
In the case of an oversized boiler, the temperature is reached very quickly making the boiler idle and the
fumes gases burn out causing grime collection. The worst scenario is when the temperature is too low. If
the boiler is not connected properly, it becomes a thermostat, which means that if you want ot lower the
temperature in your house, you need to lower the boiler temperature. It is recommended to install mixing
valves.
What is a heating curve? Heating curve is an outside temperature graph in relation to
the central heating water temperature. The heating curve is a
calculated heating temperature in relation to the outside
temperature. The heating curve graph is included in the controller manual.