Installation Manual Gas Fires Modore 185

APPENDICES
26
E.2.3 Bends
Be aware of the bends in your flue. They provide extra resistance
in the system and must therefore be included in the TVS and
THS.
There are 2 bend types:
45° and 90° bends from vertical to horizontal and vice versa.
(Type N)
45° and 90° bends from horizontal to horizontal (Type Q)
The first 3 type N bends (from vertical to horizontal) do not need
to be included in your calculations. The next type N bends are
each calculated as 1 horizontal meter in the THS.
For a type Q bend (horizontal to horizontal) the following applies:
90° bend in the horizontal section counts as 2 horizontal
meters in the THS.
45° bend in the horizontal section counts as 1 horizontal
meter in the THS
Extraction sections in a 45° upward pipe:
45° upward sections are calculated both vertically and
horizontally.
E GENERAL RULES FOR FLUE GAS EXTRACTION
E.1 Power-Fan
For flue configurations that do not function on natural dra, the
PowerFan can be used. For extensive installation instructions
and the operation of the PowerFan we refer to the manual of
the PowerFan.
E.2 Determining the flue gas extraction diameter
The general rule is that you must always adhere to a flue diameter
of 200/130. You always start with a vertical length of ½ meter
Except :
When the stove flue pipe connection is 150/100 mm.
when your flue only gradates vertically, in which case you
may taper directly onto the stove, to a diameter of 150/100.
E.2.1 Determining maximum vertical length:
If you have tapered your flue gas extraction as per the above,
to a diameter of 150/100, then the total maximum permitted
vertical length of your flue gas extraction is 11 meters. If you are
using a diameter of 200/130 then your maximum total length is
22 meters.
E.2.2 Determining maximum horizontal length:
In order to ascertain whether your intended extraction shall
function properly, a stove category is determined.
Aer you have determined in which category your fire falls, you
search for the corresponding calculation tables.
Each category refers to a table. Each appendix has two tables:
1. A table for horizontal outlet.
2. A table for vertical outlet
You must use the table applicable to you. You calculate your
total vertical section (TVS) as well as your total horizontal section
(THS). In the table you will find advice; TVS on the vertical axis
and THS on the horizontal axis.
An R means you have to put in a restrictor plate in your fireplace.
Figure E.1 shows you where the restrictor plate is inserted.
The fireplace comes with three dierent restrictor plates, each
a dierent size. Use the restrictor plate that gives you the best
flames for your fire.
Calculating the Total Vertical Section (TVS)
You calculate the Total Vertical Section by adding up all vertical
upward sections in the extraction gradation.
Calculating the Total Horizontal Section (THS)
You calculate the Total Horizontal Section by adding up all
horizontal parts in the extraction gradation.
Figure E.1 - Position of the restrictor