SERVICE AND MAINTENANCE
21
7.
SERVICE AND MAINTENANCE
7.1.
Cleaning the boiler
The boiler should be maintained and cleaned once a year. To clean the boiler follow the next
steps:
▪
Switch off the main switch in the boiler panel.
▪
Disconnect the burner (if necessary).
▪
Open the boiler door.
▪
Remove the turbinators from the fire tubes.
▪
Clean the fire chamber and the fire tubes by using a proper brush.
▪
Clean the turbinators.
▪
Assemble the pieces again and close the door.
▪
Connect the burner again (if you had disconnected it).
The boiler function must be stopped before cleaning! Make sure all the devices
are stopped, and the boiler has cooled down. It is strictly prohibited to clean
the boiler while in function!
If a chemical wash is performed to clean the boiler, special fluids that do not damage INOX
steel must be used.
The following fluids are forbidden for chemical wash:
▪
Hidrochior acid up to 0,1% concentration
▪
Solution that contain MCL
▪
Clorid (MgCl
2
, NaCl 0,01-1%, CuCl up to 1%, CaCl
2
from 5% until saturation, KCl)
▪
Any fluid which may produce alkaline or phosphorus residuals.
In order to choose the correct fluid, ensure that:
▪
It is compatible with INOX steel
▪
It eliminates slag, chalk and dirty water deposits
▪
It is easily removed with water from the system
▪
It does not produce corrosive fumes
7.2.
Maintenance after long stop
It is necessary to perform a general maintenance and cleaning of the boiler after the heating
season. Check the doors and the sealing cord. Make sure the contact with the boiler is air-
tight. Check that the door is correctly regulated and closes tight. It is recommended that you
clean the chimney box of the boiler and the chimney pipes at least once a year, in order to
assure efficient and safe function of the boiler.
After long stop of the boiler, before you put in function you need to perform the following
checks:
▪
Check the condition of the electric cables and the sensors. Make sure they are not
damaged. Check that the thermometer indicates the correct temperature and all the
thermostats function properly. Make sure the bulbs are properly positioned in the case.
▪
Make a general check of the chimney and make sure it is clean and free of obstacles.
▪
Verify the pressure in the heating network and the boiler.
▪
Check that all the valves are working properly. Replace them if necessary. Pay special
attention so that all the safety equipment of the boiler functions properly!
▪
Make sure all the ball valves of the boiler and other relative equipment are open.
▪
Check the function of the pumps. They might be blocked after long stop.
▪
Check that there have been no modifications to the installation and the boiler room
(ventilation openings, chimney and doors).
▪
Check the burner function and clean from dust.
Do not empty the water of the boiler and the heating installation after the
heating season! It will corrupt all the installation and especially the boiler.
