Dru Metro 100 - 6.5 Flue gas discharge; combustion air supply system; 6.5.1 General; 6.5.2 Application with wall terminal

6
METRO 100  INSTALLATION MANUAL
English
➠
Place the appliance on its destined location.
The gas control is mounted under the appliance, at the burner plate. It should be disconnected and placed in the
control box at a later stage. For placing the gas control in the control box, see section 6.7.
Follow the procedure described below:
➠
Disconnect the pipes of the gas control ( exible gas pipe, aluminium pilot burner pipe and thermocouple).
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Disconnect the gas control from the burner plate by unscrewing the self-tapping screw.
Caution - Make sure there is no dirt in gas pipes and connections;
- Avoid kinks in the pipes.
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Roll out the pipes in the direction of the control box.
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Roll out the ignition cable in the direction of the control box.
!Caution The data plate should remain connected to the chain.
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Place the chain with the data plate in the direction of the control box.
➠
Set the height of the appliance using the adjustable feet and
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Make the appliance level at the same time.
Caution - Do not place the appliance too tightly against the back wall; this is guaranteed by means of the wall brackets;
- Make sure the space between the appliance’s legs is kept free;
- Do not cover the appliance and/or do not wrap it in an insulation blanket or any other material.
➠
Connect the appliance to the wall using wall brackets (B) and the key bolts supplied; see  g. 3.
6.5 Flue gas discharge / combustion air supply system
6.5.1 General
The appliance is of the C11/C31 type.
The appliance is connected to a combined  ue gas discharge/combustion air supply system, hereafter referred to
as the concentric system.
The passage to the outside can be made with a wall terminal (see section 6.5.2) or a roof terminal (see section 6.5.3).
If necessary, you can also use an existing chimney (see section 6.5.4).
Caution - Only use the concentric system supplied by DRU (Ø100 / Ø150mm). This system has been tested together with the
appliance. DRU cannot guarantee a proper and safe operation of other systems and does not accept any liability for
this;
- For connecting to an existing chimney you should only use the chimney kit supplied by DRU.
The concentric system is constructed from (the connection stump of) the appliance.
If structural circumstanc es require that the concentric system is placed  rst, the appliance can later be connected
with a telescopic pipe piece.
6.5.2 Application with wa ll terminal
6.5.2.1 Construction of concentric system with wall terminal
The concentric system with wall terminal has to comply with the following conditions:
- First, a concentric pipe of at least 0.5meters should be connected vertically to the appliance;
- The total vertical pipe length may have a maximum of 4meters;
- A 90° bend is connected to the other end of the vertical part;
- When using 0.5meter of vertical pipe length, the total horizontal pipe length can have a maximum of 2meters
(excluding wall terminal, see  g.4a);
- When using a minimum of 1meter up to a maximum of 4meters of vertical pipe length, the total horizontal pipe
length can have a maximum of 3meters (excluding wall terminal, see  g.4b).
Depending on the construction of the concentric system, the appliance must receive further settings; see Table1 for
determining the conditions and section 6.8, Adjusting the appliance, for the method.
GB
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