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6.2.2 Cleaning of Combustion Chambers and Overall Firebox
Top, Bottom and the upper gas discharge chambers should be cleaned and checked for wear and tear of various
components. Areas and parts to look for are:
- Down draft injector
- Insulation boards
- Ceramic block in the bottom chamber
- Top combustion chamber door seal and tape seal behind glass
- Bottom combustion chamber door seal and tape seal behind glass
- Damper seal in the upper exhaust chamber
- Damper mechanism parts insider the upper gas discharge chamber.
- Seal of heat exchanger access plate
- Heat exchanger tubes
Further sections will describe the step by step process of carrying out servicing of different sections of the firebox
and the heat exchanges.
6.2.3 Firebox Lining Boards & Ceramic Block
The vermiculite boards in your Mystique burner are an important part of the burner that helps to achieve clean
and efficient burn. These boards are likely to degrade and will need replacement at stage. The life of boards will
depend upon usage, type of fuel burnt and care taken during operations and maintenance. The boards in both
the top and bottom chambers are held in place by interlocking into one another. The board should be replaced
when they are damaged enough that they no longer remain interlocked and cannot perform their intended task.
Refer the following diagram for location and sequence of assembly of boards in each top and bottom combustion
chamber.
The ceramic block placed in the bottom combustion chamber helps in minimizing fly ash entering the heat
exchanger and the main flue pipes. Placing ceramic block in the correct position is important for achieving clean
and efficient burning.
After removing the boards and the ceramic block, remove all the ash from both chambers using brush and pan.
6.2.4 Door and Other Seals
Seals in following areas should be checked and if required will need replacement periodically depending upon
usage of the Mystique burner.
- Top combustion chamber door seal and tape seal behind glass
- Bottom combustion chamber door seal and tape seal behind glass
- Damper seal in the upper exhaust chamber
6.2.5 Cleaning the Heat Exchanger
Though the ceramic block arrests most of the fly ash, some fine ash particles will enter heat exchanger and
condense suite over the period. The heat exchanger should be checked and cleaned at least once a year
depending upon usage.
- Open the bottom combustion chamber using tool provided with the fire
- Using hands, carefully pull the ceramic block out of its locator bricks at the rear of the chamber.
- Dust off the ceramic block and place in a safe place.
- Close the bottom combustion chamber door
- Remove the rear top exchanger panel
- Remove the heat exchanger cover plate
- Insert a long wire brush through this opening to clean the outer surfaces of all the tubes.
- The ash will fall down at the base of the heat exchanger.
- Open the bottom combustion chamber door
- Using a metal pan and a small brush collect the ash and dispose of at a safe place.
- Close the heat exchanger cover plate and screw back the rear panel
- Put ceramic block in the bottom combustion chamber and make sure it is pushed correctly at the rear.
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