Dru 0063CT3681, Installation Manual

Page: 17 / 48

7.3.2 Roof terminal (C31)
The roof terminal can end in a sloping and a flat roof.
The roof terminal can be supplied with an adhesive plate for a flat roof or with a universally adjustable tile for a sloping
roof.
When using a roof terminal (C31), the following applies:
The construction of the chosen system has to be allowed. The working method below indicates how the permissibility is
determined of a concentric system when using a roof terminal.
1
Count the number of 45° and 90° bends required (15° and 30° bends are also allowed; these are not counted).
1
Count the total number of whole metres of horizontal pipe length.
1
Count the total number of metres of vertical and/or sloping pipe length (roof terminal excluded).
1
Find the number of required bends and the total horizontal pipe length (see table 7-3, columns 1 and 2).
1
Find the required total vertical and/or sloping pipe length (see table 7-3, row 1).
1
A box with a letter means that the chosen concentric system is permitted.
1
Determine the adjustment of the appliance (see table 7-4).
1
Adjust the appliance correctly with, for instance, a restrictor slide and an air inlet guide (see section 8.2).
I nst allation manual
1 7