Bedienungsanleitung Benekov S51 (Seite 34 von 39) (Englisch)

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8. Boiler maintenance

NOTE: Before performing maintenance and cleaning the boiler and/or feeder mechanism, it is

necessary to make sure the boiler is disconnected from the power supply (plug pulled out of the

socket). Risk of injury!

1.) It is necessary to ensure timely refuelling. If a small amount of fuel remains in the container, it must be

refilled immediately to prevent extraction of "false air" and a smoked container.

2.) If the boiler is correctly adjusted, the ash has the form of a fine grey powder, which accumulates in the

ash tray drawer. The combustion compartment has self-cleaning design and in the course of normal

operation the boiler’s ash tray drawer has to be emptied once or twice a week. It is necessary to use

protective gloves for this activity.

3.) In continuous operation of the boiler it is recommended to clean the heat transfer area of the combustion

chamber or the exchanger fins once a week. The heat transfer surfaces can be subject to clogging,

which can greatly affect the heat transfer and thus the efficiency of the boiler. Occasional cleaning of the

inside of the grate (on a monthly basis) should not be forgotten. Its clogging impairs the flow of

combustion air to the burner nozzles. The boiler must be shut-off by the main switch at least 1 hour

before cleaning the grate. After the heating season the entire boiler must be carefully and completely

cleaned.

4.) The minerals contained in the fuel can form hard deposits during operation in the area of the burner. This

can subsequently cause a complete blockage of the screw shaft of the feeding mechanism. To avoid the

risk of this phenomenon, it is recommended to check the burner zone at least monthly and in the event

of hard deposits, mechanically remove any stuck material.

5.) It is further recommended to perform occasional external cleaning of drives and fans. Cleaning must be

done using a dry brush. The boiler must be disconnected from the power supply during this time.

6.) A refractory ceramic reflector is located above the boiler burner. It does not require any special attention.

Any fly ash deposited on the surface of the reflector can be regularly removed, but it does not affect its

function.

7.) For a reliable operation of the turnstile during fuel feeding into the screw feeder, it is necessary to

maintain proper tension of the chain, i.e. the deflection in the middle between the sprockets must be in

the range of 6 to 10 mm. If the deflection is bigger, the chain must be replaced. When checking the

tension and handling of the chain the boiler must be shut down. Risk of hand injury!

8.) In case of a screw fuel feeder blockage the two motors are protected against damage by the thermal

contact (working temperature of the fuel feeder motor is up to 85 °C), which after exceeding the

critical temperature shuts down both feeder motors and the fan(s). If this happens, the boiler must be

shut down and repaired.

9.) Since pressurising occurs in the burner area during fan operation, it is necessary to ensure perfect

tightness of the boiler (boiler door, the top cover of the boiler body, etc.).

10.) Occasionally perform a visual check of the emergency fire-fighting equipment.

11.) In the event of an emergency (electricity outage for long periods, etc.) or if fuel burns through the

increase in temperature opens the thermostatic valve and any fuel is extinguished with water from the

water main. Before restarting the boiler it is necessary to remove wet fuel, and fire the boiler in a

standard manner (see chap. 7.1.).

12.) The gearboxes are filled with synthetic oil in compliance with factory standards therefore no further

maintenance is required.

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