Dru G20 Installation Manual Download Page 9

Page: 9 / 40

English

I NS TAL LAT ION M ANUA L

Attach the first round concentric pipe piece to the adapter using 4 self-drilling screws.

On this connection, apply a clip binding with silicon sealing ring.

In case of round pipe pieces, attach a clip binding with silicon sealing ring to each connection.

Use a self-tapping screw to fix the clip binding to the pipe on locations that cannot be reached after installation.

In case of round pipes, apply sufficient brackets, so that the weight of the pipes does not rest on the appliance.

Determine the remaining length of the wall terminal;

Make sure the wall terminal has the right dimensions.

!Caution

Make sure that the right insertion length is maintained;

Place the wall terminal with the groove/folded seam at the top;

Make sure the horizontal concentric pipe pieces are sloping towards the wall terminal, in order to prevent
rain water from entering.

Mount the rosette (mounting inner plate); if necessary, on a heat resistant intermediate plate when passing
through combustible material.

Attach the wall terminal from the outside with four screws in their respective holes.

5.4.3 Application with roof terminal

The roof terminal is a round concentric system.

5.4.3.1 Construction of concentric system with roof terminal

The concentric system with roof terminal has to comply with the following conditions:

The construction of the chosen system has to be allowed. (See the procedure described below);

First, a concentric pipe of at least 1 meter should be connected vertically to the appliance.

Depending on the construction of the concentric system, the appliance is set by:

placing the Restrictor slide and/or

removing the air inlet guide.

In the following procedure you can see how the allowability of a concentric system can be determined and
which settings are needed.

Determine the following data:
1) The number of bends required (no distinction is made between 45° and 90° bends);
2) The total number of meters of horizontal pipe length;
3) The total number of meters of vertical and/or sloping pipe length (roof terminal excluded).
With these data and Table 5 you will be able to determine whether the concentric system is allowed.
In Table 6 you can see which setting the appliance requires.

Follow the procedure described below:

In the first 2 columns of Table 5, look for the number of bends required and the total horizontal pipe length.

In the 3rd column of Table 5, look for the total vertical and/or sloping pipe length.
If you end up in a box with the letter A, B, C, or D the concentric system chosen by you is allowed.

Use Table 6 to determine which conditions apply for the Restrictor slide and/or the air inlet guide (for setting,
see section 5.7).

5.4.3.2 Placing concentric system with roof terminal

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. In case of a sloping roof with a slope up to 24°, it is also necessary to use an adhesive plate.