3 Installation
| Explanation of device types |
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Device types | Description |
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B23 | Combustion air is extracted from the installation area. |
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C13 | Concentric and/or parallel wall flue terminal |
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C33 | Concentric and/or parallel roof flue terminal |
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C43 | Devices on common supply and discharge (concentric and/or parallel) in | |||
| blocks of flats. |
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C53 | Supply and discharge in different pressure area. |
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C63 | Devices delivered without flue gas discharge materials and/or terminal. These | |||
| devices are to be installed in accordance with the applicable local guidelines. | |||
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| Remark |
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| Make sure that the flue gas discharge is positioned in a discharge area in | |||
| which discharge is allowed for the respective device type. |
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3.9.3 | Concentric connections |
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| The table gives the requirements that the concentric systems shall meet. | |||
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| Warning |
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| Mount flue gas discharge material with a fall of 5 mm per metre towards | |||
| the device. |
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| Requirements for flue gas discharge for concentric systems (C13, C33) | |||
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| Device | Diameter | Maximum length | Maximum num- |
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| ber of 90° bends |
| TWI | 80/125 | 20 | 5 |
| TWI | 80/125 | 20 | 5 |
Caution
Both conditions given in the table shall be complied with.
When using less than the maximum number of bends, it is still not allowed to use more than the maximum pipe length.
When using less than the maximum pipe length, it is still not allowed to use more than the maximum number of bends.
All this will be explained using an example.
Practical example of concentric flue gas discharge
Example
The figure shows a TWI
24 | Instruction manual TWI |
