Bedienungsanleitung Ulma FURNACE 20kW (Seite 9 von 10) (Englisch)

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Management & Maintenance

Cleaning of the furnace

In the ULMA FURNACE the maintenance has been

minimized i.a. by a well planned construction and the

large ash box holds approx. 30 liters. Ash emptying is

made as required. Cleaning of the tubes of the furnace

should be done at the same time the ashbox is

emptying. ( Appr. 1000 kg pellet) More frequent

intervals give increased efficiency. The giver should be

cleaned at least once per month.

Be extra attentive of to the quality of the pellets at new delivery or change of deliverer.

At new delivery a flue gas analysis should be made. Therefore we recommend a service agreement.

Contact your local installer regarding information of agreement.

The impeller should be cleaned at least 1-2 times per year with airpressure.

The tubes of the furnace should be cleaned 4-5 times per year (may vary some depending on

consumption and pellet quality) or when the flue gas temperature has risen with approx. 50 degrees

since previous cleaning.

• Turn off the burner a couple of hours before service.

• Lift up the lid on the top and clean the tubes. (Use the enclosed tube wisp.)

• Pull out the burner and clean from ash residues between the burner pipes at least two times per

year..

NOTE!

Always be careful with ash since it might be ignited. The ash should be kept in fireproof vessels.

Data about pellet firing

At installation the unit shall always be adjusted with a flue gas instrument and not only with help of

the human eye. When the installation is in place and has been gotten into shape with a flue gas

instrument, ask for a print of the check measurement from the installer. There you should be able to

read the values like CO, O2, CO2, combustion efficiency, draft, flue gas temperature etc.

Goal values:

CO2 : 11 %

CO :10 - 300 ppm

O2 : 8 – 10 %

HPa : -0,10 / -0,15 (draft)

Combustion efficiency (average): 90-92 %

Gene

ral facts about fuel pellets

A fuel pellet is per definition a”short cylindrical item” for combustion. Fuel pellets are made by

pressing of finely powdered dry fuel that is made by waste products from the forest industry. The

diameter of the fuel pellets existing on the Swedish market today, vary between 6-8 mm. The effect

on the outer environment is minimal at combustion of pellets. At the combustion in a pellet system of

for example a pellet boiler or stove the stored sun energy in the raw material is released. The

emissions of unburned hydrocarbons as well as dust are in almost all cases far below the marginal

values of the authorities. The carbon dioxide taken up and captured during the growth of the trees is

released in the process to once again be taken up by the nature. In other words a circuitry.

Combustion of pellets does not provide the atmosphere extra carbon dioxide which happens at

combustion of the fossil fuels oil, gas and coal.

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Ulma FURNACE 20kW Seite 9

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