Potterton Promax HE Store Installation & Servicing Instructions Manual page 18

Cut the same
amount off
the Air Duct
& Flue Duct
Fig. 5c
18
Approx
1425mm
Air Duct
Flue Duct
Push Fit Adaptor
Flue Deflector
Fig. 5a
Fig. 5b
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.
Flue Dimensions
The standard horizontal flue kit allows for flue lengths
between 100mm and 685mm from elbow to terminal
(Fig. 5a).
The maximum permissible equivalent flue length is:
10 metres (60/100 system)
Flue Trim
1. The rubber flue trim supplied may be fitted to either
the outside wall or on the inner wall of installation.
Terminal Guard (Fig. 5c)
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.
Flue Deflector (Fig. 5b)
1. If required a flue deflector is available from your
Potterton stockist.
2. Push the flue deflector over the teminal end and
rotate to the optimum angle for deflecting plume.
Secure the deflector to the terminal with screws
provided.
© Baxi Heating UK Ltd 2012