Accessories for stoves and fireplace inserts - Jøtul stoves and ...

Technical data
3G fireplaces
The third generation of stoves and fireplace inserts (3G) is
the next step to attain more effective heat recovery. Up to
now there has been a huge energy loss in open fireplaces
with efficiency of 15-20%, plain ones with glass door and
uncontrolled air inflow (40-60%) and finally contemporary
furnaces with advanced structures (more than 70%
efficiency).
2. 3.
1.
As opposed to older generations of products, 3G fireplaces
and furnaces recover heat energy from exhaust gases. It is
achieved through additional devices which are mounted
between the hearth and a smoke duct. These are available
convectors and radiators (1), water exchangers (2) and last
but not least accumulating masses HSS (3). Therefore, using
3G heat receivers allows to obtain more energy (from 4 to 12
kW) and to save up to 30% of fuel.
It is recommended to combine 3G fireplaces with electronic
flame controller ERS, which optimize the combustion
process – from kindling through refueling to end up with fire
extinction. Electronic flame controller ERS control the set
temperature and steer the amount of air inflow required for
kindling and burning process.
Chimney connection
tmax 70 o C
tmax 70 o C
tmax 40 o C
tmax 120 o C
tmax 550 o C
tmax 60 o C
tmax 120 o C
tmax 300 o C
12
13
1
7
5
14
10 11
9
3 4
8
6
400 o C
(550 o C)
2
Fireplace insert (1) is connected to the smoke duct (2) by
means of a set of transition pieces and steel pipes (3). In
order to secure a safe and stable connection, one should
use a chimney crossing (4) which permits flexible and tight
connection of the pipes with the chimney.
Fireplace insert is provided with fresh air needed for
combustion by a 100mm diameter pipe (5). By using a choke
valve with flexible regulation (6) it is possible to dose the
amount of air for a correct combustion process. Exhaust
gases are carried off the insert’s combustion chamber (1) and
led to the smoke duct (2).
Hot air distribution
Operation of heating system is based on using convection
heat. The air (7) warmed to room temperature flows under
the fireplace insert (1) and is heated up in the space between
fireplace’s body and its cover (8). Heated air flows up
towards the top part of a distributor (9) and then divides.
Next the heated air flows into the rooms through aluminum
Spiro pipes (10), galvanized pipes (11) and ducts (12). The
pipes’ and ducts’ outlets are furnished with wall grates
with regulation, which dispense the appropriate amount
of heated air into the rooms. However, there are also wall
grates without regulation (13) and these are installed on the
fireplace’s surrounding. In order to prevent the surrounding
from cracking when it is adjacent to a wall, it is necessary to
ventilate the space above the hot air distributor with the use
of the grate (14).
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