Technical data

© Baxi Heating UK Ltd 2010
17
Fig. 13
Fig. 14
100mm
685mm
Push Fit
Adaptor
Air Duct
Flue Duct
Cut the same
amount off
the Air Duct
& Flue Duct
Approx
1425mm
3.8.7 For Roof Terminals
1. In the case of a pitched roof 25 - 50 degrees, position the
lead tile to replace/flash over existing roof tiling. Make an
aperture in the roof suitable for the lower tube of the roof
terminal and ensure the integrity of the roof cover is
maintained. The adjustable plastic collar can either be
positioned on the lead tile or the lower tube of the roof
terminal prior to the final positioning of the vertical flue through
the tile. Check the collar is correctly located to suit required
roof pitch (either 25° to 38° or 37° to 50°). From inside the roof
adjust the flue to a vertical position and secure to the roof
structure with the clamp supplied.
2. For flat roof installations the aluminium flashing must be
incorporated into the roof covering and the appropriate
aperture made in the roof decking. The vertical flue is lowered
onto the flashing making sure the collar of the flue locates
securely with the flashing. (A mastic seal may be necessary).
From inside the roof, adjust the flue to a vertical position and
secure to the roof structure with the clamp supplied.
3.8.8 Flue Dimensions
The standard horizontal flue kit allows for flue lengths between
100mm and 685mm from elbow to terminal (Fig. 13).
The maximum permissible equivalent flue length is: 3.55
metres
NOTE: Each additional 45° of flue bend will account for
an equivalent flue length of 0.5m.
eg. 45° = 0.5m, 90° = 2 x 45° = 1m etc.
3.8.9 Flue Trim
1. The rubber flue trim supplied may be fitted to either the
outside wall or on the inner wall of installation.
3.8.10 Terminal Guard (Fig. 14)
1. When codes of practice dictate the use of terminal guards,
they can be obtained from most Plumbers’ and Builders’
Merchants.
2. There must be a clearance of at least 50mm between any
part of the terminal and the guard.
3. When ordering a terminal guard, quote the appliance name
and model number.
4. The flue terminal guard should be positioned centrally over
the terminal and fixed as illustrated.
3.8.11 Flue Deflector (Fig. 13a)
1. If required a flue deflector is available from your Potterton
stockist.
2. Push the flue deflector over the terminal end and rotate to
the optimum angle for deflecting plume. Secure the deflector
to the terminal with screws provided.
Flue Deflector
Fig. 13a