Manual Atmos A85 (page 26 of 66) (English)

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26-EN

Operation and Maintenance Manual - EN

Setting up required output and combustion quality:

Required output is set up by parameters T4 and T6

The real output is, however, also affected by pellet diameter and an angle of the conveyor. That is why

it is necessary to know that when conveyor angle or pellet diameter were changed after set-up of the

burner, the burner must be set up again.

Quality of combustion is set up with the fan‘s air flap in such way that the flame ends at the front

edge of the combustion chamber spherical space. This means that in boiler D80P, P80 flames fill the

entire space of the combustion chamber. However, reaching of the flames as far as the spherical space

of the boiler‘s body must be prevented.

Accurate final set-up of combustion is to be done after the boiler had been in continuous operation

for 30 to 60 minutes. The best way is to use an exhaust analyzer. We recommend to set up the burner

so that surplus O2 in exhaust gas fluctuates between 7 to 10 % and average CO is less than 250 mg/

m3. Exhaust gas temperature must never drop below 110 °C and rise above 250 °C.

INFO - Although the burner has many functionalities (parameters), these only relate

to set up of the basic ones, which characterize output of the burner T4, T6 and quality

of combustion - fan‘s speed S3, air flap opening

Approximate recommended set up of the burner for separate outputs when using conveyors

DRA50 – 1.7, 2.5, 4 and 5 m, 6 mm pellets and the conveyor at an angle of 45°:

CAUTION - Parameter T4 must never be set higher than 9 s.

INFO – If necessary, when there is little space in the boiler room, you may shorten the conveyor

(screw) or its legs as you wish at any time, but in such way that the conveyor angle remains

smaller than 45°.

Minimum length of the pipe between the burner and the conveyor must be more than

30 cm. Maximum length of the pipe should not exceed 1 m.

• Parameter S1 – Allowed number of attempts for ignition with fuel supply….(2).

If parameter S1 is set to 4, the fuel will always be ignited with both the ignition elements at

the same time (Z1 + Z2) in 2 attempts for ignition with fuel supply.

CAUTION - Always after the last attempt for ignition with fuel supply given by parameter

S1, an attempt for ignition without fuel supply will follow to test the equipment. If the fuel

is not ignited after this attempt, the system will be put out of operation and the ALARM

START error message will appear.

Boiler

output

Parameter

Opening of the air

ap on the burner

fan of a boiler with

an exhaust fan

50 – 60 kW 85 s 5 s 12 s 30 % 47 mm

70 – 80 kW 85 s 8,3 s 12 s 47 % 67 mm

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Atmos A85 Manual

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