barbas ENERGA 70-55 TUNNEL, Installation Instructions Manual

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ENERGA 70-55 TUNNEL
2.7 CHIMNEY
Every fi re needs its own chimney. Multiple connections to one main chimney is not per-
mitted. Ensure that any existing chimney is completely air-tight and in good condition. It
must be suitable to accommodate the appliance in question. Make sure your chimney
has a proper cap to prevent rain getting in and birds nesting on it.
The draught in your chimney determines how your fi re will burn. The recommended
draught is approx. 15 Pa (0.15 mbar). Your chimney should be at least 4 metres tall
from the point at which the chimney connects to the fi re. Chimneys which are well-
insulated measuring in excess of 8 metres can develop a signifi cant draught if the fi re
is raging. We therefore advise you to fi t a chimney damper or draught diverter between
the fi re and the chimney.
2.7.1 Chimneys
Ensure that any existing chimney is completely air-tight and in good condition. The
diameter of the entire chimney, including the chimney pot on the roof must have a
diameter at least equal to the diameter of the fl ue gas outlet of the appliance. See
chapter 14.
If there is no suitable chimney immediately available, we advise you to use double-
walled insulated stainless steel pipe sections. A chimney must be compliant with the
prevailing building regulations. Have a specialist carry out the building. When purchasing
such pipe sections, we advise you to fi nd out whether some form of casing of the pipes
is required.
A few points for your attention:
• chimneys must be free-standing, i.e. they must not rest on the appliance itself.
• all connections between the appliance and the chimney must be properly insulated.
• fl ammable material must be kept clear (outside the casing/insulation zone) of all
through-feeds in the fl oor or wall (remember the roof decking).
Do not make any horizontal connections. Deposits and soot will collect here (unless it is
a short horizontal connection directly behind the built-in fi re).
The chimney calculation, as in Germany, is made according to DIN 4705 parts 1 and 2
with each of the following measured values. See chapter 14.
- mass fl ow of the fl ue gasses;
- temperature of fl ue gases (at fl ue gas connection to the appliance)
- chimney draught
(nominal heat output)