In addition, it is also possible to use a split (twin pipe) system by fitting a special adaptor to the flue connector and using the aperture for the air vent intake located on the top part of the combustion chamber.
To utilise the air intake it is necessary to:
1.Remove the bottom of the air intake by cutting it with a suitable knife (see FIG. 2.8);
2.Insert the elbow into the air intake until it reaches the lower end. (There is no need to use gaskets or sealing componds).
The components marked * in FIG 2.9 are present or absent depending on the type of flue system used by the installer.
FIG. 2.8 | FU05A |
|
|
| Ø 80 mm |
|
FIG. 2.9 | FU004A | FU006A |
|
| IMPORTANT! |
COAXIAL SYSTEMS
For all flue systems, a restrictor must always be inserted into the boiler’s flue connector; the restrictor must be ø 43 or ø 41 in diameter depending on the length of piping indicated in Table 2.1.
The diagrams illustrate some of the various designs for coaxial or twin pipe flue systems.
For fur ther information on discharge/ventilation accessories,
see the FL U E PI P E AC C E S S O R I E S MANUAL.
FIG. 2.10 | FU001A |
10