Biomass Boiler Service | What is Involved

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The Wood Pellet Solutions division of Renewable Living Ltd carries our servicing on a wide range of biomass boilers – both domestic and commercial.

The following is intended as a guide only – the sequence varies from manufacturer to manufacturer.

The first sequence described is for a Pelleburn boiler from NES and the second sequence is more typical for either an Extraflame or MCZ Boiler.

Typical Biomass Boiler Service Sequence – Pelleburn Boiler from NES.

PelleBurn_model

Important: Most N.E.S. boilers have the flue on the top of the boiler. This means that you you need to have a method of dismantling the lower parts of the flue in order to get at the upper parts of the burn chamber. This is very important as it is also where most soot builds up, restricting air flow through the boiler and causing the black smoke that is usually the indicator that the boiler needs servicing.

As a matter of course with Wood Pellet Solution installations we put adjustable flue parts in order to facilitate access. However this has not always been done by other installers – so sometimes there can be a significant amount of additional work (two hours typically) required to service this type of boiler.

Please Note: When we refer to “Replace” in description below – we mean to ‘put back In Stu’ rather than ‘swap for new’

1) Remove, clean and inspect the suction fan (on top of the boiler), renew gaskets as required. Replace

2) Remove top of boiler (remove lower part of flue to access) Clean top of burn chamber.

3) Remove, clean and inspect self clean mechanism. Remove and clean turbulator springs. Replace springs and gaskets. Replace boiler top and flue. Reseal all joints with fire cement and or silicone.

4) Remove burner

5) Remove burner grate. Clear all debris from air ways, inspect and renew as required.

6) Remove and clean photo sensor / flue sensor as appropriate

7) Remove clean and inspect burner auger. Clean auger chamber of debris and foreign objects

8) Remove, clean and inspect high pressure cleaning fan

9) Replace all of the above in reverse sequence.

10) Check fuel feed auger for wear

11) Lubricate ash auger

(Optional but not usually done unless there are specific concerns – empty and clean fuel hopper removing dust and particulates)

12) Test all the above components from installer menu. Rectify any problems/failures

13) If the boiler in unknown to us, weigh pellets and calibrate auger. Adjust burner settings as needed

14) Light boiler and wait until flue is above 100°C before flue gas analysis

15) Adjust burner settings as needed

16) Clean up, and hand over to client.

Typical Service Sequence For an ExtraFlame or MCZ Wood Pellet Boiler.

Extraflame LP14 Wood Pellet Boiler

Extraflame LP14

1) Remove top of boiler (remove lower part of flue to access) Clean top of burn chamber.

2) Remove, clean and inspect self clean mechanism. Remove and clean turbulator springs. Replace springs and gaskets. Replace boiler top. Reseal all joints with fire cement and or silicone.

3)Remove base cap of flue, clean and inspect.

4) Remove, clean and inspect the suction fan (on top of the boiler), renew gaskets as required. Replace

5) Remove burner grate. Clear all debris from air ways, inspect and renew as required.

6) Remove and clean boiler ignitor

7) Remove ash box and fan access panel, clean airway

8) Replace, clean and inspect the fan

(Optional but not usually done unless there are specific concerns – empty and clean fuel hopper removing dust and particulates)

9) Test all the above components from installer menu. Rectify any problems/failures

10) Run boiler diagnostic software (Extraflame only). Rectify any problems

11) Light boiler and wait until flue is above 100°C before flue gas analysis

12) Adjust burner settings as needed

13) Clean up, and hand over to client.

Extraflame and MCZ Wood Pellet boilers are generally quicker to service as it is easier to get access to the components and you don’t need to strip the burner down.

Biomass Wood Pellet Boiler Parts

Renewable Living Ltd is able to supply parts for most types of biomass boiler and stocks spare parts for both NES Burnit Boilers and Extraflame Boilers.

Biomass / Wood Pellet Boiler – Typical Service Sequence


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