Pellet Boilers – Frequently Asked Questions
Here you can find the FAQ about our pellet boilers answered. In case your question is not answered, please contact our representative.
1. Where are Kepo pellet boilers manufactured?
Kepo pellet boilers are made in our company based in Kosjerić, Serbia. The boilers are made of 3-5mm thick boilerplate produced by Železara Smederevo. Accessories are imported from Italy, Great Britain and Switzerland.
2. Do I need accessories to put the boiler into operation?
The pellet boiler comprises all elements necessary for its installation into the central heating system: filling and emptying valves, safety valve, expansion tank, and water pump. If you wish to extend the 2-year boiler warranty to 5 years, a mixing valve with thermo head 40-70°C must be installed to ensure a much longer service life of the boiler. It is necessary to purchase flue pipes attested for pellet boilers and stoves in order to connect the boiler to the chimney.
3. How safe is it to use the boiler?
The boiler has multiple protections against overheating. The first level of protection is electronics that do not allow the water temperature to exceed 85°C. A safety thermostat, which interrupts feeding of pellets when the boiler is nearing the critical temperature, is the second level of protection. In addition, the thermostat does not allow overheating of the boiler, but reports the error and shuts the boiler down.
The electronics do not allow the system pressure level higher than 2.5bar nor lower than 0.6bar. They report the error and shut down the boiler in both cases.
If for some reason the electronics fail, the boiler has a safety valve which drains water from the system, thus relieving pressure to 3bar.
The boiler also has a safety pressure switch vacuum. Its role is to discontinue pellet feeding, prevent the possibility of smoke from penetrating out of the system, report the error and shut down the boiler in the event of a flue pipe clogging or poor gas flow through the chimney.
The boiler has a mechanical valve which reduces pressure in case it gets excessive in the combustion chamber, thus preventing any problems in the future operation of the boiler.
4. What types of boilers do you have in your offer?
Kepo offers two series of boilers: AC (automatic cleaning of the burner) and MC (manual cleaning of the burner), with 15, 20, 25, and 35kW power.
5. Does the boiler operation require a fresh air supply?
The Kepo pellet boiler is a major oxygen consumer. It is therefore necessary to provide a sufficient supply of fresh air.
It is necessary to make an air vent of at least 100cm² in the lower part of the boiler room.
It is advisable to make an air vent in the upper part of the room as well.
6. Do I need a chimney?
It is necessary to connect the boiler to an insulated chimney, 3m minimum height and ø130mm minimum diameter.
In its production program, Kepo has mountable, insulated inox chimneys. Contact us for further information on the chimneys.
You must not in any way convey flue gasses via uninsulated flue pipes from the outside of the wall or outside of the insulated area, as this will cause condensation and interfere with boiler operation and transmission of flue gasses.
7. Does the boiler have an automatic operation mode?
Yes, the boiler has the automatic operation mode that can be set in two ways: through automatic boiler control or via room thermostat.
8. What is the pellet tank volume?
- AC/MC 15 – 40kg
- AC/MC 20 – 62kg
- AC/MC 20 – 75kg
- AC/MC 25 – 120kg
9. How often do I clean the boiler?
Boiler cleaning can be done regularly and generally, the frequency depends on consumption.
Regular cleaning is done once in 3 to 7 days. General cleaning is done once a year. Boiler maintenance has a considerable impact on pellet consumption and reliable operation.
The most common causes of automatic shutdown of the boiler are poor pellet quality and irregular maintenance.
10. How important is pellet quality for proper boiler operation?
It is one of the most important factors for proper boiler operation.
Parameters are set and the boiler is put into operation in accordance with conditions at the site of installation. When the parameters are aligned with your chimney and oxygen inflow, pellet is the next thing that proper operation depends on.
Quality pellet has never been too expensive! By using quality pellet you will avoid:
- Numerous servicing costs
- Automatic boiler shutdowns as a result of poor combustion in the burner
- Huge deposits of ash in the flue pipes and more frequent boiler cleaning than planned
- Greater pellet consumption
The pellet boiler works in accordance with the principle of controlled combustion. Therefore, quality pellets are indispensable for a smooth and economical operation.
Download the PDF document Pellet Boilers – Frequently Asked Questions (100kb).